Skip Main Navigation Skip To Navigation Content

American Community Survey

Census.govAmerican Community Survey › Data & Documentation: Documentation › Errata
Skip top of page navigation

Errata


Note

Subject

Revised Date
95

Errors Compiling 2010-2012 ACS 3-Year PUMS files in DataFerrett

Data users who developed estimates using the DataFerrett version of the 2010-2012 ACS 3-Year PUMS files from February 6, 2014 to June 2, 2014 will want to rerun critical estimates. These files were erroneously compiled due to a coding error when bringing in the records to DataFerrett. This error did not affect the PUMS CSV files and SAS datasets which can be downloaded directly from the PUMS FTP web site. The DataFerrett version of the 2010-2012 ACS 3-Year PUMS files were corrected and re-released on June 2, 2014.

June 2, 2014
94

Errors in 2010-2012 ACS 3-year and 2008-2012 ACS 5-year Subject Table S2101, Veteran Status

In the Disability Status section of the 2010-2012 ACS 3-year Subject Table S2101 Veteran Status, incorrect estimates were displayed in the line "With any disability" for the Veterans and Nonveterans columns. On February 6, 2014, there was an update in American FactFinder of this table that shows (X) in place of the incorrect estimates.

In the Poverty Status in the Past 12 Months and the Disability Status sections of the 2008-2012 ACS 5-year Subject Table S2101 "Veteran Status", incorrect estimates were displayed in the lines "Below poverty in the past 12 months" and "With any disability" for the Veterans and Nonveterans columns. On February 6, 2014, there was an update in American FactFinder of this table that shows (X) in place of the incorrect estimates.

For the correct estimates for these groups, we suggest using Detailed Table B21007 - Age by Veteran Status by Poverty Status in the Past 12 Months by Disability Status for the Civilian Population 18 Years and Over or C21007 - Age by Veteran Status by Poverty Status in the Past 12 Months by Disability Status for the Civilian Population 18 Years and Over.

February 6, 2014
93

Data Collection Error for Telephone Service Question: Counties in Georgia

The Census Bureau identified a problem in the collection of data on the availability of telephone service in the following Georgia counties in 2012: Bartow, Catoosa, Cherokee, Floyd, and Whitfield. The data collection problem occurred during computer-assisted personal interviews only.

As a result, data products containing telephone service estimates have been removed or suppressed on American FactFinder for certain geographies within the 2012 ACS 1-year data, 2010-2012 ACS 3-year and 2008-2012 ACS 5-year data. Download the list of affected geographies for the 2012 1-year, 2010-2012 3-year and 2008-2012 5-year. The data products removed or suppressed for these specific geographies are B25043, C25043, and B992513. Portions of the following data products were also affected: S0102, S0103, S0201, S0501, S0502, S0503, S0504, S0505, S0506, S2504, DP04, and CP04.

Updated:
December 17, 2013


September 19, 2013
92

Data Collection Error for Women Who Gave Birth in the Past Year: 167 Geographies in Florida, Georgia, Kansas, North Carolina, Ohio, and Texas

The Census Bureau identified a problem in the collection of data on women who gave birth in the past year in the following geographies: Rome, GA Metro Area; Durham-Chapel Hill, NC Metro Area; Columbus, OH Metro Area; Jackson County, FL; Bartow County, GA; Cherokee County, GA; Floyd County, GA; Polk County, GA; Cherokee County, KS; Crawford County, KS; Labette County, KS; Durham County, NC; Franklin County, OH; Dallas County, TX; Williamson County, TX; Durham city, NC; Columbus city, OH; Dallas city, TX; (and 149 other geographies -- Download the list of affected geographies for the 2012 1-year and the 2010-2012 3-year). The data collection problem only occurred during a portion of the computer-assisted personal interviews.

In the 2008-2012 ACS 5-year the following geographies were affected: Rome, GA Metro Area; Durham-Chapel Hill, NC Metro Area; Columbus, OH Metro Area; Jackson County, FL; Bartow County, GA; Cherokee County, GA; Floyd County, GA; Polk County, GA; Cherokee County, KS; Crawford County, KS; Labette County, KS; Custer County, MT; Fergus County, MT; Powder River County, MT; Prairie County, MT; Durham County, NC; Franklin County, OH; Dallas County, TX; Williamson County, TX; Durham city, NC; Columbus city, OH; Dallas city, TX; (and 7886 other geographies --Download the full list of 5-year affected geographies).

As a result, data products containing estimates of women who gave birth in the past year have been removed or suppressed on American FactFinder for these geographies within the 2012 ACS 1-year and 2010-2012 ACS 3-year data. The data products removed or suppressed for these specific geographies are B13002, B13002A-I, B13004, B13008, B13010, B13012, B13014, B13015, B13016, B99132, C13004, S1301, and GCT1303. Portions of the following data products were also affected: S0201, S0902, CP02, and DP02.

Updated:
December 17, 2013


September 19, 2013
91

Error in 2011 ACS 1-Year and 2009-2011 ACS 3-Year Selected Population Profiles

The Census Bureau has identified errors in some race iteration groups in the 2011 ACS 1-year Selected Population Profiles and 2009-2011 ACS 3-year Selected Population Profiles. As a result, the profiles for the affected race iteration groups have been removed from American FactFinder for the 2011 ACS 1-year and 2009-2011 ACS 3-year data releases. This issue was fixed and should not affect data year 2012.

July 11, 2013
90

Error in the calculation of the Margin of Error (MOE) in Detailed Table B20004 for the following datasets: 2007-2009 3-year, 2005-2009 5-year, 2006-2010 5-year and 2007-2011 5-year

The Census Bureau has identified errors in the calculation of the margin of error (MOE) for table B20004 - Median Earnings by Sex by Educational Attainment for the Population 25 Years and Over- that affect the 2007-2009 3-year, 2005-2009 5-year, 2006-2010 5-year and 2007-2011 5-year. All estimates for this table are correct.

An alternative formula is used when replicate estimates are in either the top or bottom open-ended categories (below $2,500 or above $250,000). The formula requires a value that was calculated incorrectly.

The majority of the MOEs are not affected. For the MOEs which are affected, the published MOE is, in general, more conservative than the actual MOE.

This error will not be corrected.

April 16, 2013
89

Corrected Estimates for Hawaii Geographies in the EEO Tabulation 2006-2010

Issue 1

On June 13, 2013, the Census Bureau corrected and re-released tables EEO-ALL01R and EEO-ALL01W from the EEO Tabulation 2006-2010.

Previous note about this error was posted March 19, 2013

Error in Estimates for Hawaii Geographies in the EEO Tabulation 2006-2010

The Census Bureau has identified errors in the EEO Tabulation 2006-2010 estimates of the number of people with the following four race and ethnicity categories: not Hispanic or Latino, Native Hawaiian and Other Pacific Islander and White; not Hispanic or Latino, Native Hawaiian and Other Pacific Islander and Asian; not Hispanic or Latino, Native Hawaiian and Other Pacific Islander, Asian, and White; and Balance of not Hispanic or Latino, which includes the balance of non-Hispanic individuals who reported multiple races or reported Some Other Race alone. The specification of the estimates referred to an invalid base reference table, resulting in an estimate of zero people in these categories. The percentages for these race and ethnicity categories are correct. These errors exist only on select tables for geographies in Hawaii, including tables EEO-ALL01R and EEO-ALL01W. Once available, we will update this note with the complete list of affected tables.

As a result, we plan to correct and re-release the tables containing these errors.

Issue 2

Also on the same day, the Census Bureau corrected and re-released the following twelve tables from the EEO Tabulation 2006-2010:

EEO-ALL07W-N1, EEO-ALL07W-N2, EEO-ALL07W-P1, EEO-ALL07W-P2, EEO-CIT07W-N1, EEO-CIT07W-N2, EEO-CIT07W-P1, EEO-CIT07W-P2, EEO-NCIT07W-N1, EEO-NCIT07W-N2, EEO-NCIT07W-P1, and EEO-NCIT07W-P2.

For table EEO-ALL07W-P2, the Census Bureau identified errors for geographies in Hawaii only. An incorrect percentage was displayed for the data row "Total, all education levels--Total, all ages--Total, both sexes" for the following three race and ethnicity categories:

  • Not Hispanic or Latino, Native Hawaiian and Other Pacific Islander and Asian
  • Not Hispanic or Latino, Native Hawaiian and Other Pacific Islander, Asian, and White
  • Balance of not Hispanic or Latino (includes the balance of non-Hispanic individuals who reported multiple races or reported Some Other Race alone)
  • The specification of the percentages in these cells was incorrect. This error occurred for all commuting flows in the table for Hawaii geographies. The percentages for other lines in this table were correct for other race and ethnicity categories. (The number estimates for these three data cells were correct on Table EEO-ALL07W-N2).

    For all twelve '07W' tables, there was a computing or server error resulting in some Hawaii geographies where the 'N2' and 'P2' tables had a different number of lines/commuting flows and/or where 'N1' and 'P1' tables were absent when the 'N2' and 'P2' tables had data. This error occurred only for some Hawaii geographies.

    Updated:
    July 11, 2013


    March 19, 2013
    88

    Error in the 2010 and 2011 American Community Survey Tables R2301 and GCT2301

    The Census Bureau has identified errors in the estimates for the percentage of people 16 to 64 years old who are in the labor force in the 2010 1-year and 2011 1-year ACS Ranking table R2301 "Percent of People 16 to 64 Who Are in the Labor Force (Including Armed Forces)" and the 2010 1-year, 2007-2010 3-year, 2006-2010 5-year, 2011 1-year, 2008-2011 3-year and 2007-2011 5-year ACS Geographic Comparison Table GCT2301 "Percent of People 16 to 64 Who Are in the Labor Force (Including Armed Forces)." As a result, on February 6, 2013 we removed the tables from American FactFinder for all geographies.

    For correct estimates, we suggest using Detailed Table B23001 "Sex by Age by Employment Status for the Population 16 Years and Over" or C23001 "Sex by Age by Employment Status for the Population 16 Years and Over." The percentage of people 16 to 64 years old who are in the labor force can be calculated by dividing total labor force estimates for people 16 to 64 by the total population 16 to 64.

    February 8, 2013
    87

    Corrected POWPUMA codes for 2010 and 2011 in PUMS files

    On March 4, 2013, the Census Bureau corrected and re-released the 2010 ACS 1-year PUMS files and the 2011 ACS 1-year PUMS files.

    The 2008-2010 and 2009-2011 3-year PUMS files, and the 2006-2010 and 2007-2011 5-year PUMS files will not be re-released. The lists of corrected 2010 POWPUMA codes [CSV 34KB] and corrected 2011 POWPUMA codes [CSV 35KB] along with the record identifiers housing unit/GQ person serial number (SERIALNO) and person key (SPORDER) can be used to update the POWPUMA codes.

    Previous note about this error was posted January 17, 2013

    Errors in POWPUMA codes for 2010 and 2011 in PUMS files

    Incorrect codes for place of work public use microdata areas (POWPUMAs) were assigned for persons who worked in Babylon town and Brookhaven town, Suffolk County, New York who did not work at home. These cases received a POWPUMA code of 02800, which normally consists of Steuben and Yates Counties in New York. The correct POWPUMA code for Brookhaven is 04392. The correct POWPUMA code for Babylon, as well as most towns in Suffolk County, is 04390. Cases where people worked at home (JWTR = 11) have the correct POWPUMA codes. This affects the 2010 and 2011 records in the 2010 and 2011 1-year PUMS, 2008-2010 and 2009-2011 3-year PUMS, and the 2006-2010 and 2007-2011 5-year PUMS files. The Census Bureau is evaluating the feasibility of correcting these files and will update this note once a decision is made.

    Updated:
    March 4, 2013


    January 17, 2013
    86

    Data Collection Error for Telephone Service Question: 6 Counties in Georgia

    The Census Bureau identified a problem in the collection of data on the availability of telephone service in the following Georgia counties since 2009: Dodge, Montgomery, Telfair, Toombs, Treutlen, and Wheeler. The data collection problem occurred during computer-assisted personal interviews only. No other characteristics appear to have been affected.

    As a result, data products containing telephone service estimates have been removed or suppressed on American FactFinder for certain geographies within the 2007-2011 5-year data. Download the list of affected geographies. The data products removed or suppressed for these specific geographies are B25043, B992513, DP04, and S0201.

    December 6, 2012
    85

    Data Collection Error for Women Who Gave Birth in the Past Year: 4 Counties in Alabama

    The Census Bureau identified a problem in the collection of data on women who gave birth in the past year in the following Alabama counties: Butler, Conecuh, Covington, and Escambia. The data collection problem only occurred during a portion of the computer-assisted personal interviews. No other characteristics appear to have been affected.

    As a result, data products containing estimates of women who gave birth in the past year have been removed or suppressed on American Fact Finder for certain geographies within the 2007-2011 5-year data. Download the list of affected geographies. The data products removed or suppressed for these specific geographies are B13002, B13002A, B13002B, B13002C, B13002D, B13002E, B13002F, B13002G, B13002H, B13002I, B13004, B13008, B13010, B13012, B13014, B13015, B13016, B99132, DP02, GCT1303, S0902, and S1301.

    December 6, 2012
    84

    Corrections to documentation for ACS Public Use Microdata Sample (PUMS) Data Dictionaries

    The Data Dictionaries for the 2009 1-year, 2007-2009 3-year, 2005-2009 5-year, 2008-2010 3-year, and 2006-2010 5-year PUMS files contained the minimum value of -9,999 for variable SEMP (self-employment income) and the correct value should be -10,000. The affected Data Dictionaries have been corrected.

    The Data Dictionaries for the 2007 1-year and 2005-2007 3-year PUMS files contained the maximum value of 9,999 for variable INSP (fire/hazard/flood insurance) and the correct value should be 10,000. The affected Data Dictionaries have been corrected.

    The corrected Data Dictionaries are being released on a rolling basis along with the 2011 ACS 1-year, 3-year, and 5-year PUMS.

    October 26, 2012
    83

    Data collection error for telephone service question: 6 counties in Georgia

    The Census Bureau identified a problem in the collection of data on the availability of telephone service in the following Georgia counties since 2009: Dodge, Montgomery, Telfair, Toombs, Treutlen, and Wheeler. The data collection problem occurred during computer-assisted personal interviews only. No other characteristics appear to have been affected.

    As a result, data products containing telephone service estimates have been removed or suppressed on American FactFinder for the following geographies within the 2009-2011 3-year data: Dodge County, GA; Toombs County, GA; Vidalia, GA Micro Area; Dodge County School District, GA; PUMA5 03200, GA. The data products removed or suppressed for these specific geographies are B25043, C25043, B992513, DP04, and S0201.

    October 25, 2012
    82

    Data collection error for women who gave birth in the past year: 6 geographies in Alabama

    The Census Bureau identified a problem in the collection of data on women who gave birth in the past year in the following Alabama geographies: Butler County, Butler County School District, Covington County, Covington County School District, Escambia County, and Escambia County School District. The data collection problem only occurred during a portion of the computer-assisted personal interviews. No other characteristics appear to have been affected.

    As a result, data products containing estimates of women who gave birth in the past year have been removed or suppressed on American FactFinder for the following geographies within the 2009-2011 3-year data: Butler County, AL; Butler County School District, AL; Covington County, AL; Covington County School District, AL; Escambia County, AL; and Escambia County School District, AL. The data products removed or suppressed for these specific geographies are B13002, B13002A, B13002B, B13002C, B13002D, B13002E, B13002F, B13002G, B13002H, B13002I, B13004, B13008, B13010, B13012, B13014, B13015, B13016, B99132, DP02, GCT1303, S0902, and S1301.

    October 25, 2012
    81

    Errors in the 2010 ACS Summary File Technical Documentation

    Error in the 2010 ACS Summary File Geography File

    In data year 2010, 2 new variables (BTTR and BTBG) were added to the geography file used with the ACS Summary File. Due to their inclusion, the field size for the variable BLANK in starting position 426 decreased. The table providing the layout of the geography file in Section 2.4 of the 2010 ACS 1-year, 2008-2010 ACS 3-year, and 2006-2010 ACS 5-year Summary File Technical Documentation lists the field size of the last variable, BLANK, as 50. The correct field size is 43

    In addition, the table providing the layout of the geography file in the 2006-2010 ACS 5-year Summary File Technical Documentation mistakenly uses the layout from the 2008-2010 ACS 3-year Summary File Technical Documentation. A corrected table is now available. These errors will be corrected in the 2011 ACS Summary File Technical Documentation.

    Error in the 2010 Summary File Technical Documentation for Table B07101

    Table B07101 "Movers Between Regions in the United States" is published for the nation only. Appendix E of the 2008-2010 ACS 3-year and 2006-2010 ACS 5-year Summary File Technical Documentation lists this table as being available in both the US and PR sequences. The table should only be listed as a US sequence. This error will be corrected in the 2011 ACS Summary File Technical Documentation. In addition, the sequence file for Puerto Rico inadvertently includes empty cells for this table. Due to a reordering of the sequences, there are no "Puerto Rico Only Sequences" in the 2011 ACS Summary File.

    Update to Section C.7 "Sequences Used Only for United States Tables or Only for Puerto Rico Tables" in the 2010 Summary File Technical Documentation

    Section C.7 "Sequences Used Only for United States Tables or Only for Puerto Rico Tables" in the 2010 ACS 1-year, 2008-2010 ACS 3-year, and 2006-2010 ACS 5-year Summary File Technical Documentation states that "Puerto Rico only sequences" are blank for areas other than Puerto Rico. This statement is incorrect. When data users open up a "PR only sequence" for areas other than Puerto Rico (i.e., states), they will see values. These values correspond to the tables in the sequence that are not different between the US and PR. These tables are also provided in their corresponding US sequence. Due to a reordering of the sequences, there are no "Puerto Rico only sequences" in the 2011 ACS Summary File.

    October 25, 2012
    80

    Correction to the Narrative Profiles on American FactFinder

    On October 25, 2012, the Census Bureau corrected and re-released the 2011 ACS 1-year Narrative Profiles.

    Previous note about this error was posted October 5, 2012

    Errors in Narrative Profiles on American FactFinder

    The Census Bureau has identified errors in the 2011 American Community Survey 1-year Narrative Profiles. In some cases, the charts and graphs in the profiles displayed incorrect estimates. We have removed these profiles from American FactFinder and plan to re-release these profiles with corrected estimates on October 25, 2012. We suggest using the ACS Data Profiles to access the estimates until the Narrative Profiles are corrected and restored.

    Updated:
    October 26, 2012


    October 5, 2012
    79

    Minor errors in data collection and processing of the 2011 ACS

    The Census Bureau recently discovered several small errors in the ACS Failed Edit Follow-up (FEFU) data collection instrument and processing system. In FEFU, households who have returned a mail form but whose data failed a completeness check are called to collect the missing data. This operation is designed to improve the final quality of mail-returned questionnaires. The errors occurred in late 2011 when changes were made to correct the issues noted in Errata Note 75. The errors had minimal impact on the published estimates. The affected households are spread throughout the United States, and we have no reason to believe that the errors had a notable impact on published estimates for any specific geographic area.

    There are two types of small errors reported in this errata note. First, the wrong person was deleted for a small number of households reporting fewer household members during the FEFU interview than was reported on the household's mail return. Most interviewers were able to catch and correct this error when the final roster reconciliation was done in the interview. Second, during some FEFU interviews, the interviewer was not prompted to ask some of the questions regarding missing employment status, marital history, and home value on the household's mail return. Most interviewers were able to detect this error and account for it during the interview; however, it is possible that the error could result in more missing data for some items and lead to higher item allocation rates.

    Based on the analysis of the impact of these errors and the risks associated with correcting them, there are no plans to correct the dataset and re-release the affected data products. Errors in the FEFU operation are now corrected.

    September 20, 2012
    78

    Correction to the 2010 ACS 1-year Selected Social Characteristics in the United States (CP02) and Selected Social Characteristics in Puerto Rico (CP02PR) Comparison Profiles

    On March 8, 2012, the Census Bureau corrected and re-released the 2010 ACS 1-year Selected Social Characteristics in the United States (CP02) and Selected Social Characteristics in Puerto Rico (CP02PR) Comparison Profiles.

    Previous note about this error was posted January 26, 2012

    Errors in the 2010 ACS 1-year Selected Social Characteristics in the United States (CP02) and Selected Social Characteristics in Puerto Rico (CP02PR) Comparison Profiles

    The Census Bureau has discovered errors in one row in the 2010 ACS 1-year Selected Social Characteristics in the United States (CP02) and Selected Social Characteristics in Puerto Rico (CP02PR) Comparison Profiles available on American FactFinder. The 2006 and 2007 percentages of households with one or more people over 65 are incorrect. This error impacts all geographies.

    We will not remove these tables from American FactFinder. We plan to release corrected comparison profiles on American FactFinder in March 2012.

    Updated:
    March 8, 2012


    January 26, 2012
    77

    Correction to Selected Economic Characteristics (DP03) and Selected Housing Characteristics (DP04) Data Profiles for the following ACS products: 2010 ACS 1-year, 2008-2010 ACS 3-year and 2006-2010 ACS 5-year.

    On January 26, 2012, the Census Bureau corrected and re-released the Selected Economic Characteristics (DP03) and Selected Housing Characteristics (DP04) Data Profiles for the 2010 ACS 1-year, 2008-2010 ACS 3-year and 2006-2010 ACS 5-year.

    Previous note about this error was posted January 9, 2012

    Errors in some rows of the Selected Economic Characteristics (DP03) and Selected Housing Characteristics (DP04) Data Profiles for the following ACS products: 2010 ACS 1-year, 2008-2010 ACS 3-year and 2006-2010 ACS 5-year.

    The Census Bureau has discovered errors in some rows of the Selected Economic Characteristics (DP03) and Selected Housing Characteristics (DP04) Data Profiles available on American FactFinder.

    There was a programming error with some non-numeric values in these two profiles. Some cells that should contain non-numeric values such as "(X)" or "2,500+" instead contain incorrect text or numeric values. The error mainly impacts estimates of median housing value and median income, where those values are particularly low or high.

    We have removed the Selected Housing Characteristics Data Profiles from American FactFinder for the 2010 1-year estimates, the 2008-2010 3-year estimates, and the 2006-2010 5-year estimates. We plan to release corrected versions of these tables and of the Selected Economic Characteristics Data Profiles on January 26, 2012.

    Updated:
    January 26, 2012


    January 9, 2012
    76

    Correction to 2008-2010 ACS 3-year Detailed Table B20004 and Subject Tables S1501, S2001, & S2002 for Estimates of Educational Attainment

    On January 19, 2012, the Census Bureau corrected and re-released four tables in the 2008-2010 ACS 3-year estimates in American FactFinder. We have also released corrected estimates in the 2008-2010 ACS 3-year Summary File. The affected tables were:

    • B20004, Median Earnings In The Past 12 Months By Sex By Educational Attainment For The Population 25 Years And Over
    • S1501, Educational Attainment
    • S2001, Earnings In The Past 12 Months
    • S2002, Median Earnings In The Past 12 Months Of Workers By Sex And Women's Earnings As A Percentage Of Men's Earnings By Selected Characteristics

    Previous note about this error was posted December 8, 2011

    Errors in 2008-2010 ACS 3-year Detailed Table B20004 and Subject Tables S1501, S2001, & S2002 for Estimates of Educational Attainment

    The Census Bureau has identified errors in four tables in the 2008-2010 ACS 3-year estimates. Estimates pertaining to educational attainment in these tables were incorrect. The affected tables were:

    • B20004, Median Earnings In The Past 12 Months By Sex By Educational Attainment For The Population 25 Years And Over
    • S1501, Educational Attainment
    • S2001, Earnings In The Past 12 Months
    • S2002, Median Earnings In The Past 12 Months Of Workers By Sex And Women's Earnings As A Percentage Of Men's Earnings By Selected Characteristics

    We have removed these tables from American FactFinder and removed B20004 from the 2008-2010 ACS 3-year Summary File. We plan to re-release these tables with corrected estimates on January 19, 2012.

    Updated:
    January 26, 2012


    December 8, 2011
    75

    Minor errors in data processing from 2005 through 2011

    The Census Bureau recently discovered several small errors in the ACS processing system. The erroneous code was identified and corrected in July, 2011, and data processed since then have been handled appropriately. This note briefly describes the errors and the impacted variables.

    The code errors existed in the processing of paper questionnaires included in the ACS Failed Edit Follow-Up (FEFU) operation, causing a very small amount of self-reported data from the mail questionnaires to be omitted. The FEFU operation involves follow-up phone calls for paper forms that contain incomplete responses. In many instances, the original responses were re-captured in the follow-up interview.

    The following items were affected by the errors, but had no notable impact on the published estimates at the national level: Minutes to work, Class of worker, Available to start work last week, Worked 50 or more weeks during the past 12 months, Relationship, Year moved in, and Year built. The errors appear to be spread throughout the United States, and we have no reason to believe they had a notable impact on published estimates for any specific geographic area below the national level.

    The errors also affected two items that we estimate have small, but notable, impacts on national level estimates. The errors resulted in a small underestimate (approximately 1.5 percentage points) of grandparents responsible for caring for the their grandchildren for 5 or more years. In addition, the errors affected the service connected disability rating item, resulting in a small overestimate of the "Not Reported" category (approx. 1.9 percentage points) and small underestimates for the "30 or 40 percent" (approx. 0.7 percentage points), "50 or 60 percent" (approx. 0.4 percentage points), and "70 or more percent" (approx. 0.8 percentage points) categories.

    Based on the analysis of the impact of these errors and the risks associated with correcting them, there are no plans to correct the dataset and re-release the affected data products.

    November 16, 2011
    74

    Errors in 2009 ACS 1-year Subject Table S2701, "Health Insurance Coverage Status"

    In the 2009 ACS 1-year Subject Table S2701 "Health Insurance Coverage Status", in the section "Work Experience" the "civilian noninstitutionalized population 18 years and older" and "worked full-time, year-round in the past 12 months" display incorrect estimates of the "number uninsured" and "percent uninsured". There are no plans for correcting these estimates in this table.

    For the correct estimates for these groups, we suggest using Detailed Table "B27012 - Health Insurance Coverage Status and Type by Work Experience By Sex by Age" or "C27012 - Health Insurance Coverage Status and Type by Work Experience by Age".

    September 19, 2011
    73

    Errors in HINCP and FINCP in the 2004 and 2005 ACS 1-Year and 2005-2007 3-Year Public Use Microdata Samples (PUMS) in DataFerrett

    Three of the PUMS datasets available in DataFerrett have errors in the variables HINCP (Household Income) and FINCP (Family Income). The affected datasets are the 2004 1-year PUMS, the 2005 1-year PUMS, and the 2005-2007 3-year PUMS. For these datasets, all values for HINCP and FINCP are incorrect in DataFerrett. We plan to correct the variables and re-release the files in DataFerrett.

    The PUMS files accessed through the FTP site do not contain these errors. Data users should obtain these files through the FTP site until the variables have been corrected in DataFerrett.

    September 19, 2011
    72

    Errors in the 2008 and 2009 ACS 1-year Subject Table S1811, "Selected Economic Characteristics for the Civilian Noninstitutionalized Population By Disability Status"

    In the 2008 and 2009 ACS 1-year Subject Table S1811, two lines under the "EARNINGS IN THE PAST 12 MONTHS" heading are labeled incorrectly. The lines in error describe the percentage of people with earnings of "$1 to $4,999 or loss" and "$5,000 to $14,999". The estimates released were produced using different earnings cut-offs. The estimates on those two lines actually show the percentages with earnings of "$1 to $9,999 or loss" and "$10,000 to $14,999", respectively.

    The error affects the 2008 and 2009 ACS 1-year estimates available on American FactFinder and as comma separated value (csv) files via the Census Bureau's FTP site. There are no plans to re-release these tables.

    August 11, 2011
    71

    Corrections to documentation for ACS Public Use Microdata Samples (PUMS) in DataFerrett

    On July 29, 2011, several errors were corrected in the variable descriptions and value labels associated with the ACS PUMS files in DataFerrett. The problems affected variable descriptions within the application, as well as variable labels and value labels attached to customized tables and downloadable data files.

    Correction to the PUMS variable descriptions and value labels were made to the following variables: ELEP, FULP, GASP, GRPIP, INTP, NOC, NP, NRC, PERNP, PINCP, RETP, SSIP, VALP, WATP, and WKHP. The corrections were made in DataFerrett to the 2004, 2005, 2006, 2007, 2008, and 2009 1-year PUMS; and the 2005-2007 3-year PUMS.

    Previous note about this error was posted June 20, 2011

    Errors in DataFerrett documentation for selected variables in the ACS Public Use Microdata Samples (PUMS)

    Several errors have been discovered in the DataFerrett documentation associated with the ACS PUMS files. The problem affects variable descriptions within the application, as well as variable labels and value labels attached to customized tables and downloadable data files. While the underlying data are correct, some of these documentation errors could result in flawed interpretations of ACS PUMS results when using DataFerrett. We are in the process of fully identifying the incomplete or erroneous documentation.

    PUMS variables with documentation problems include ELEP, FULP, GASP, GRPIP, INTP, PAP, PERNP, PINCP, RETP, and SSIP. The errors could affect the usage of 1-year PUMS files from 2005, 2006, 2007, 2008, and 2009, and the 2005-2007 3-year PUMS. The other ACS PUMS files in DataFerrett do not have documentation errors.

    This errata note will be updated with a full description of the problems as soon as possible. In the meantime, users of affected PUMS files from DataFerrett are encouraged to consult the PUMS Documentation page on the ACS website. The PUMS documentation on the ACS website is correct.

    Updated:
    August 11, 2011


    June 20, 2011
    70

    Errors in SMOCP in the 2005-2009 ACS 5-year Public Use Microdata Sample (PUMS) Files

    The 2005-2009 ACS 5-year PUMS has errors in the housing unit variable SMOCP (selected monthly owner costs). SMOCP is created by summing several variables associated with the monthly costs of owning a housing unit. For cases collected in 2005 and 2006, SMOCP was incorrectly calculated to include both annual mobile home costs (MHP) and monthly mobile home costs (MHP/12). As a result, SMOCP values were overestimated for all mobile homes.

    This error affects cases on the housing unit records that were collected in 2005 and 2006. Cases collected in 2007-2009 were not affected. We are reviewing feasibility of re-releasing the 2005-2009 5-year housing files in the future.

    To correct this error, use the SERIALNO variable to identify the data collection year, and then subtract MHP from SMOCP for all 2005-2006 cases where BLD=1 (mobile homes). Each case's data collection year is indicated in the first 4 digits of SERIALNO.

    April 20, 2011
    69

    Re-release of 2009 ACS 1-year Subject Tables S2702 "Selected Characteristics of the Uninsured in the United States" and S2702-PR "Selected Characteristics of the Uninsured in Puerto Rico"

    Revised: 5/13/2011

    Subject Tables S2702 and S2702-PR were re-released on AmericanFactfinder and on the Census Bureau's FTP site on May 13, 2011. These tables were removed on March 30, 2011, due to several data errors.

    The revised tables contain corrected information for the following rows:

    "White-Alone, not Hispanic or Latino"
    "Hispanic or Latino (of any race)"
    "$1 to $4,999 or loss" which is under Earnings in the Past 12 Months
    "$5,000 to $14,999" which is under Earnings in the Past 12 Months

    Rows for "Language Spoken at Home" have been removed and will not be re-released.

    Previous notes about this error were posted on:
    May 2, 2011

    Error in 2009 ACS 1-year Subject Tables S2702 "Selected Characteristics of the Uninsured in the United States" and S2702-PR "Selected Characteristics of the Uninsured in Puerto Rico"

    Revised: 5/2/2011

    On March 30, 2011, Subject Tables S2702 and S2702-PR were removed due to several data errors. These tables include selected characteristic distributions for the uninsured population in the United States and Puerto Rico. The following table rows contained incorrect information:

    "White-Alone, not Hispanic or Latino"
    "Hispanic or Latino (of any race)"
    All rows regarding "Language Spoken at Home"
    "$1 to $4,999 or loss" which is under Earnings in the Past 12 Months
    "$5,000 to $14,999" which is under Earnings in the Past 12 Months

    These tables were first introduced in the 2009 ACS 1-year data product. The errors existed in the 2009 1-year estimates on both American FactFinder and in the comma separated value (csv) files available via the Census Bureau's FTP site. Revised versions of Subject Tables S2702 and S2702-PR will be available in May 2011. The revised tables will not include rows for "Language Spoken at Home."

    March 30, 2011

    Error in 2009 ACS 1-year Subject Tables S2702 "Selected Characteristics of the Uninsured in the United States" and S2702-PR "Selected Characteristics of the Uninsured in Puerto Rico"

    Subject tables S2702 and S2702-PR, which displayed selected characteristics of the uninsured in the United States and Puerto Rico, were removed because of two estimate errors. Under the Race and Hispanic or Latino Origin section of these subject tables, the "White-Alone, not Hispanic or Latino" and "Hispanic or Latino (of any race)" estimates were switched for all geographies. For the correct estimates for these populations, please refer to detailed table B27001H for the White Alone, not Hispanic or Latino population and B27001I for the Hispanic or Latino population.

    The error only affects the 2009 ACS 1-year estimates that were available on American FactFinder and as comma separated value (csv) files via the Census Bureau's FTP site. Revised data for Subject Tables S2702 and S2702-PR will be available in May 2011.

    Updated:
    May 13, 2011


    March 30, 2011
    68

    Re-release of the 2007-2009 ACS 3-year Public Use Microdata Sample (PUMS) Files to correct for errors in ADJINC and ADJHSG

    Prior to April 7, 2011, the 2007-2009 ACS 3-year PUMS had errors in the variables ADJINC and ADJHSG on the housing unit files. Corrected housing unit files were released on April 7, 2011.

    Previous note about this error was posted March 17, 2011

    Errors in ADJINC and ADJHSG in the 2007-2009 ACS 3-year Public Use Microdata Sample (PUMS) Files

    The 2007-2009 ACS 3-year PUMS has errors in the variables ADJINC and ADJHSG on the housing unit files. These variables are used to adjust dollar values into 2009 dollars. Each adjustment variable is a constant within each data collection year.

    The error only affects cases on the housing unit record that were collected in 2007 and 2008. Cases collected in 2008 were assigned the 2007 value, and cases collected in 2007 were assigned the 2008 value. Cases collected in 2009 are not affected, and the person-level files were not affected.

    To correct this error, use the SERIALNO variable to identify the data collection year, and replace the data with the values in the table below. Each case's data collection year is indicated in the first 4 digits of SERIALNO. The table below shows the correct values for cases in each data collection year.

    Year ADJINC ADJHSG
    2007 1051849 1034483
    2008 1014524 0996205

    We will release the corrected 2007-2009 ACS 3-year PUMS files in April 2011.

    Updated:
    April 7, 2011


    March 17, 2011
    67

    The Re-release of Selected Sequences from the 2009 ACS 1-Year Summary File

    Processing errors were discovered in the 2009 ACS 1-Year Summary File that was released on September 28, 2010. The errors affected fifteen sequences: 1, 2, 107, 108, 113, 114, 164, and 169-176. These errors occurred in both the estimate (e) and margin of error (m) files.

    Sequences 164, 169, 170, and 176 were replaced for Puerto Rico only. The other erroneous sequences were replaced for most or all areas.

    The corrected sequences were released on January 26, 2011.

    January 26, 2011
    66

    The Re-release of two of the 2008 ACS 1-year Public Use Microdata Sample (PUMS) Files

    Between November 9, 2010 and November 29, 2010, the 2008 ACS 1-year PUMS files named "csv_pus.zip" and "csv_hus.zip" erroneously contained 2009 ACS 1-Year PUMS data. These two 2008 ACS 1-Year PUMS data files were reissued on November 29, 2010. The remaining 2008 ACS 1-Year PUMS files – including the state-level files and SAS format files – were unaffected by this problem.

    December 15, 2010
    65 Corrections and enhancements to the 2003, 2004, 2005, and 2006 ACS 1-year Public Use Microdata Sample (PUMS) Files and the 2005-2007 ACS 3-year PUMS Files

    The 2003, 2004, 2005, and 2006 ACS 1-year PUMS and the 2005-2007 3-year PUMS files were revised in November 2010 to correct an error in the AGE variable and to make a number of other smaller improvements. The table below is a complete list of changes made to the revised files. The original version of this note posted in November 2010 did not describe the complete list of changes made to the revised files.

    PUMS Files Description of corrections Impacted Variables
    All Samples The age variable was corrected for persons age 65 and up. The revised files apply a modified age perturbation edit. This is the same revision that was made to the 2006 ACS 1-year PUMS files, described in Errata Note 50. For more details on how the corrections were made, see the User Note titled, "The Correction and Re-release of the 2003, 2004, and 2005 ACS 1-year Public Use Microdata Sample (PUMS) Files and the 2005-2007 3-year PUMS Files."
    2005 1-year
    2006 1-year

    Topcodes were raised for several income variables. The re-released files applied higher topcodes to several income variables, including INTP, OIP, RETP, SEMP, and WAGP. The additional detail in the new files resulted in a small number of changes to variables that are built from component income variables, including FINCP, GRPIP, HINCP, OCPIP, PERNP, POVPIP, and PINCP. The changes affect less than 2 percent of the cases in each file.
    2003 1-year
    2004 1-year
    2005 1-year
    2006 1-year
    Topcodes were raised for several housing characteristic variables. The re-released files applied higher topcodes to housing variables including CONP in all years and including MHP and RNTP in 2006. The 2006 changes in RNTP also caused a small number of changes in GRNTP and GRPIP.
    2003 1-year Errors in the family and household income variables were corrected. For approximately 15,000 cases, the personal income variables from the population file were not being summed correctly in the creation of the family and household income variables, FINCP and HINCP. The re-released files corrected this problem. The changes to HINCP also resulted in a smaller number of changes in the GRPIP variable.
    2003 1-year
    2004 1-year
    2005 1-year
    2006 1-year
    2005-2007 3-year
    Variables indicating period of military service were made consistent with new age values. The revised AGE values in the re-released files created inconsistencies with variables indicating period of military service. As a result, some values were changed for the variables MIL, MLPA, MLPB, MLPG, MLPH, MLPI, MLPJ, MPLK, and VPS. These changes affected fewer than 1,000 cases in each dataset.
    2003 1-year
    2004 1-year
    2005 1-year
    2006 1-year
    A previously documented error in the Selected Monthly Owner Costs variable was corrected. Errata 41 instructed users how to fix a problem with the SMOCP variable in the original PUMS releases. The error was corrected in the re-released files. Users do not need to apply any additional fixes. The SMOCP changes also caused changes in OCPIP.

    2005 1-year
    2006 1-year
    A previously documented error in the variable indicating presence and age of own children was corrected. Errata 40 described an error with the PAOC variable in the 2005 and 2006 1-year PUMS. The error was corrected in the re-released files.
    2006 1-year An error in the variable documenting previous state or country of residence was corrected. MIGSP values of 168 (undocumented) in the original PUMS release were changed to values of 169 "(Other Europe, not specified") in the re-release.
    2005 1-year Errors in variables indicating Census Bureau division and region were corrected for all cases in Puerto Rico. In Puerto Rico, DIVISION values were changed from 7 (indicating the West South Central division) to 0 (indicating that PR is not part of a Census Bureau division). REGION values were changed from 3 (indicating the Southern Region) to 9 (indicating that PR is not in a Census Bureau region).
    2004 1-year An error in the variable documenting when the household moved into the house or apartment was corrected. Code used to construct MV in the 2004 1-year PUMS was edited to be consistent with code used in later years. As a result, MV values for about 42,000 households were changed to be one category higher or lower than they were in the original PUMS release.
    2005-2007 3-year Inflation adjustment variables were corrected. The factor to adjust income and earnings dollar amounts for inflation (ADJINC) was corrected for the 2007 cases on the 2005-2007 files. The factor to adjust housing dollar amounts for inflation (ADJHSG) was moved from the person-level files to the housing unit-level files, which made it consistent with the documentation.
    2005-2007 3-year Occupation codes were updated to be consistent for all years. Occupational codes in the SOCP variable were edited so that 2005 cases were coded in the same way as 2006 and 2007 cases. Specifically, SOCP values of 119190 were changed to 1191XX, values of 1311XX were changed to 131XXX, and values of 231011 were changed to 2310XX. OCCP values were altered only for cases from 2005.

    Previous notes about this error were posted November 18, 2010

    Age Adjustments in the 2003, 2004, and 2005 ACS 1-year Public Use Microdata Sample (PUMS) Files and the 2005-2007 ACS 3-year PUMS Files

    The 2003, 2004, and 2005 ACS 1-year PUMS and the 2005-2007 3-year PUMS files have been revised by applying a modified age perturbation edit. This is the same revision that was made to the 2006 ACS 1-year PUMS files that is described in Errata Note #50. For more details on how the corrections were made, see the User Note titled “The Correction and Re-release of the 2003, 2004, and 2005 ACS 1-year Public Use Microdata Sample (PUMS) Files and the 2005-2007 3-year PUMS Files.”

    Several other minor corrections were made to the 2005-2007 3-year PUMS files. The factor to adjust housing dollar amounts for inflation (ADJHSG) has been moved from the person-level files to the housing unit-level files, which will make it consistent with the documentation. The factor to adjust income and earnings dollar amounts for inflation (ADJINC) has been corrected for the 2007 cases on the 2005-2007 files. The occupation code (SOCP) for the 2005 cases on the person-level file have been updated to be consistent with the new occupation codes used for the 2006 and 2007 cases.

    Updated:
    January 25, 2012


    November 18, 2010
    64 The Correction and Re-release of the 2008 ACS 1-year and 2006-2008 ACS 3-year Public Use Microdata Sample (PUMS) Files

    A small number of errors were detected in the 2008 ACS internal microdata file, leading to errors in the 2008 ACS 1-year PUMS files and the 2006-2008 ACS 3-year PUMS files. The 2008 ACS 1-year PUMS and the 2006-2008 ACS 3-year PUMS files were corrected to the extent they could be without causing a risk of disclosure.

    The following housing variables were corrected: telephone service (TEL), number of rooms (RMSP), number of bedrooms (BDSP), kitchen facilities (KIT), refrigerator (REFR), and their respective allocation flags. For more detail on these errors, see Errata Notes #53 and #54. The "speaking a language other than English at home" (HHL) variable was also corrected due to the editing error referred to in Errata Note #61.

    In addition, on the 2006-2008 3-year PUMS housing unit-level files, the variable FMVYP has been renamed FMVP so that it is consistent with the documentation and previous files.

    For more details on how the corrections were made, see the User Note titled "The Correction and Re-release of the 2008 ACS 1-year and 2006-2008 ACS 3-year Public Use Microdata Sample (PUMS) Files."

    Previous notes about this error were posted November 18, 2010

    Additional documentation on changes made in the ACS PUMS files re-released in 2009 and 2010

    Five of the ACS PUMS files were re-released in 2009 and 2010 to address a known problem with the AGE variable. The Errata Notes accompanying these releases were Note 50 (for the 2006 1-year PUMS) and Note 65 (for the 2003, 2004, and 2005 1-year PUMS, and the 2005-2007 3-year PUMS). Notes 50 and 65 discuss edits only to the AGE variable and--in the case of the 2005-2007 3-year file--the SOCP, ADJINC, and ADJHSG variables.

    The original notes did not make clear that the re-released files also include numerous other minor corrections. This User Note documents the additional changes made to the re-released PUMS files. In all cases, the additional changes were improvements that provided additional detail or corrected for small errors discovered in the original releases.

    November 18, 2010
    63 Subject Table S2407

    A column heading is in error in single-year data from 2005, 2006, 2007, and 2008, and multi-year files from 2005-2007 and 2006-2008. The column "Private not-for-profit wage and salary workers" should have read "Employee of private company workers." The column is labeled correctly in the version of this table produced using the 2009 ACS.

    September 22, 2010
    62 Subject Tables S2402, S2404, S2408, and S2409

    The universe description of these tables is incorrect in single-year data from 2005, 2006, 2007, and 2008, and multi-year files from 2005-2007 and 2006-2008. These tables erroneously identify the universe as the "civilian employed population 16 years and over with earnings." The universe for the total, male, and female columns is the civilian employed population 16 years and over. This includes persons who have earnings as well as those who do not have earnings. The universe for median earnings (dollars), median earnings (dollars) for male, and median earnings (dollars) for female is the civilian employed population 16 years and over with earnings. Starting in 2009, "with earnings" was removed from the universe description to more accurately describe the frequency distributions.

    September 22, 2010
    61 Editing errors: 2008 ACS and 2006-2008 ACS

    Several minor errors were discovered in the 2008 ACS edit programs for a number of variables including age, citizenship status, employment status, household language, income, industry and occupation, race and Hispanic origin, real estate taxes included in mortgage payment, and second mortgage. In each case, the edit programs were not completely updated to reflect variable changes resulting from the addition of three new questions and the revision of twelve other questions in 2008. This error affects almost every table but the effect is very small. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products as well as future multiyear products. We do not plan to rerelease any of the existing 2008 ACS 1-year or 2006-2008 ACS 3-year tables on American FactFinder, or the 2008 or 2006-2008 ACS PUMS files.

    August 31, 2010
    60 Errors in data for the period of service for veterans: 2008 ACS, 2006-2008 ACS and prior years going back to the 2000 ACS (referred to then as the Census 2000 Supplementary Survey)

    An error was discovered in the processing of the ACS that has produced an overestimate of the number of veterans that served between World War II and the Korean War in the ACS from 2000-2008. Answers of "don't know" or "refused" to the period of service question were incorrectly recorded as served between World War II and the Korean War for a small number of people. We estimate that the national totals for that population are overestimated by about 8,000 veterans (about 5 percent of the veteran population) in the 2008 ACS tables, and by a similar amount in the 2000-2007 ACS tables. However, the estimated percentage of veterans that served between World War II and the Korean War did not change. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products as well as future multiyear products. We do not plan to rerelease any of the existing 1-year or 3-year ACS tables on American FactFinder, or any of the ACS PUMS files.

    August 31, 2010
    59 Errors in data for the Vietnamese population: 2008 ACS, 2006-2008 ACS and prior years going back to the 2000 ACS (referred to then as the Census 2000 Supplementary Survey)

    An error was discovered in the processing of the ACS that has produced an overestimate of the Vietnamese population in the United States in the ACS from 2000-2008. Answers of "don't know" or "refused" to the race question were incorrectly recorded as Vietnamese for a small number of people collected via mail questionnaires. We estimate that the national totals for the Vietnamese population are overestimated by approximately 170,000 people (about 10 percent of the Vietnamese population) in the 2008 ACS tables, and by a similar amount in the 2000-2007 ACS tables. We will produce tables of the Vietnamese population from the corrected 2008 ACS data and update this errata notice with the link to the tables when they are available. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products as well as future multiyear products. We do not plan to rerelease any of the existing 1-year or 3-year ACS tables on American FactFinder, or any of the ACS PUMS files.

    August 31, 2010
    58 Errors in data for the 'Samoan alone' population: 2008 ACS, 2006-2008 ACS and prior years going back to the 2000 ACS (referred to then as the Census 2000 Supplementary Survey)

    An error was discovered in the processing of the race data on some ACS mail forms from 2000 to 2008. Responses on the mail questionnaire that checked only the "Samoan" box for the race question (with no other race reported) were erroneously changed to "don't know." In these cases, race was imputed as if the respondent had not provided an answer to the race question. We estimate that the national total for the Samoan population is underestimated by approximately 23,000 people (about 15 percent of the Samoan population) in the 2008 ACS tables and by a similar amount in the 2000-2007 ACS tables. Data collected via the telephone and personal visit modes are not affected. We will produce tables of the Samoan population from the corrected 2008 ACS data and update this errata notice with the link to the tables when they are available. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products as well as future multiyear products. We do not plan to rerelease any of the existing 1-year or 3-year ACS tables on American FactFinder, or any of the ACS PUMS files.

    August 31, 2010
    57 REVISED. Errors in data for four Asian groups: 2008 ACS and 2009 ACS

    Some 2008 ACS race responses of Japanese, Korean, Vietnamese, and "Other Asian" checkboxes were processed incorrectly due to processing changes made to accommodate the race question's new layout in the 2008 questionnaire. These errors were limited to mail forms. Data collected via the telephone and personal visit modes were not affected. We estimate that this error results in the following changes to the national 2008 ACS estimates: increases for the Japanese population (less than 5 percent) and the Asian Indian and Filipino populations (less than 1 percent); and decreases for the Chinese population (less than 3 percent) and the Korean population (less than 2 percent). The Vietnamese population was also impacted by the error described in Errata Note 59, with the net affect being an increase less than half of 1 percent. Additionally, the total for all of the other Asian groups alone or in combination decreases by about 4 percent. This error does not directly impact the national total for the Asian alone population. Given these errors, the 2008 estimates for these populations will not be published in the 2009 ACS Comparison Profiles, and we advise users against making 2009 to 2008 comparisons. We do not plan to rerelease any of the existing 2008 ACS 1-year estimates or the 2006-2008 ACS 3-year estimates on American FactFinder or in the 2008 ACS PUMS files. A very small number of mail returns in 2009 were also processed in error resulting in minor effects on the 2009 ACS 1-year tabulations. No revisions are planned.

    September 27, 2010
    56 Missing data: 2008 ACS and 2006-2008 ACS

    An error was discovered in the processing of the 2008 ACS 1-year data and the 2006-2008 ACS 3-year data. About 0.5 percent of the people that should have been included in the survey in 2008 were omitted in error. These were a small percentage of cases whose data were collected via the mail mode. Data collected via the telephone and personal visit modes are not affected. The housing data and only the first person in the household were included in the processing, but all other household members were erroneously excluded. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products. We do not plan to rerelease any of the existing 2008 ACS 1-year or 2006-2008 ACS 3-year tables on American FactFinder, or the 2008 or 2006-2008 ACS PUMS files.

    August 31, 2010
    55 Drivers per Car, Truck or Van in S0801 in the 2005 through 2008 ACS

    There was an error in the calculation of "Workers per car, truck, or van" in Subject Table S0801 for 2005 through 2008 ACS. Total number of workers was used for the numerator instead of total number of workers using car, truck, or van. The correct value can be calculated taking the total number of workers for car, truck, or van in Detailed Table B08006 or C08006 and dividing by the total aggregate number of vehicles (car, truck, or van) used in commuting in Detailed Table B08015. Table 1 shows the number of workers per car, truck, or van for the U.S. for the years affected.

    Table 1. National
    Survey Year Number of workers using car, truck, or van; Aggregate number of vehicles (car, truck, or van) Number of workers per car, truck, or van
    2006-2008 121,248,284 113,074,420 1.07
    2008 124,177,220 115,709,885 1.07
    2005-2007 118,714,472 110,723,895 1.07
    2007 120,442,188 112,476,810 1.07
    2006 119,898,146 111,722,900 1.07
    2005 116,658,693 108,865,805 1.07
    July 1, 2010
    54 2008 ACS 1-year and 2006-2008 ACS 3-year estimates for number of rooms and number of bedrooms items

    An error was discovered in the 2008 ACS 1-year data and the 2006-2008 ACS 3-year data, which involved Question 7 on the housing section (number of rooms and number of bedrooms items) on the 2008 ACS questionnaire . For housing units where data were collected via a computer-assisted telephone interview or a computer-assisted personal interview, if the number of rooms was missing a value of one room and zero bedrooms was erroneously assigned (instead of being imputed from the entire distribution of responses). Approximately 3 percent of all housing units at the national level are affected. The impact is greater on vacant housing units (about 22 percent affected) than occupied housing units (about 0.3 percent affected). A headnote (including a link to this errata note) is included on all of the affected tables.

    April 12, 2010
    53 2008 ACS 1-year and 2006-2008 ACS 3-year estimates for household kitchen facilities and telephone service

    Two errors were recently found affecting the 2008 ACS 1-year data and the 2006-2008 ACS 3-year data for household kitchen facilities and telephone service. The errors involve the last two items in Question 8 on the housing section of the 2008 ACS questionnaire which asks whether the housing unit has a refrigerator and telephone service (including cell phones). The error involved the incorrect capture of the responses to those items. It affected the estimates of householders who reported no telephone service, resulting in an underestimate of "no" responses, especially for the telephone item, and an increased imputation rate for both items. The impact on the estimate of housing units with complete kitchen facilities (which is based in part on the refrigerator item) is negligible. For the telephone service item, however, the impact is more noticeable. For example, at the national level the percent of households reporting no telephone service in 2008 was 1.8 percent; however, after correcting the data capture error, the percent reporting no telephone service is approximately 2.8 percent. A headnote (including a link to this errata note) is included on all of the affected tables.

    April 12, 2010
    52 Update to the 2003 ACS PUMS Data Dictionary for MIGSP

    The 2002 codes for the Migration State or Foreign Country variable (MIGSP) was erroneously published in the 2003 ACS PUMS Data Dictionary. The Data Dictionary has been updated to reflect the correct codes and was re-released on December 28, 2009.

    December 28, 2009
    51 Summary File Number 146 for Puerto Rico

    An error was discovered in the 2007 and 2008 ACS 1-year, 2005-2007 ACS 3-year, and 2006-2008 ACS 3-year Summary Files for Puerto Rico. The sequence number 146 that contains Detailed Table B98011 HOUSING UNIT COVERAGE RATE is not available for Puerto Rico and a comma should have been included to indicate the missing table. This error occurred in all three sets of data: estimate (e), margin of error (m) and standard error (s). These corrected Summary Files were released on December 28, 2009.

    December 28, 2009
    50 Age Adjustments in the 2006 ACS Single-Year Public Use Microdata Sample (PUMS) Files

    The 2006 ACS 1-year PUMS have been revised by applying a modified age perturbation edit to these files. Age perturbation is one of several disclosure avoidance techniques used in the creation of the ACS PUMS files. It disguises original data by randomly adjusting the reported ages for a subset of individuals. As discussed in Errata Note #47, this technique in some previous years of ACS PUMS processing resulted in inconsistent sex ratios for selected age groups, especially ages 65 and over. The modified age perturbation edit was applied to people aged 65 and over to reduce inconsistencies among this group. The revised file estimates for people 65 years and older align closer to the ACS full sample by single year of age for sex ratios, social security participation, labor force participation, person income and home ownership. The sex ratio inconsistencies for persons aged 65 and over will not be seen in the 2006-2008 ACS 3-year PUMS files since the 2006 ACS 1-year PUMS files have been revised. The spreadsheet [XLS 21KB] displays sex ratio estimates from the ACS full sample and from the PUMS files for the affected years.

    The original 2006 PUMS files have been removed and replaced with the revised 2006 1-year PUMS files. To request the original 2006 PUMS files, please send an e-mail to acso.users.support@census.gov with "Request Original 2006 PUMS files" in the subject line.

    December 18, 2009
    49 2008 ACS 1-year Public Use Microdata Sample (PUMS) Files

    A formatting error was discovered in the 2008 ACS 1-year PUMS files released on October 30, 2009. The affected variables FINCP, HINCP , PERNP and PINCP were displayed in scientific notation. The incorrect format caused unintentional rounding of these values. This formatting error has been corrected and the revised 2008 ACS 1-year PUMS files were re-released on November 3, 2009. After correction, the variables WAGP, SEMP, INTP, SSP, SSIP, PAP, RETP, and OIP sum correctly to PINCP, variables WAGP and SEMP sum correctly to PERNP, and PINCP summed across family members or household members will equal FINCP and HINCP respectively.

    November 10, 2009
    48 2008 ACS Detailed Table B25109 Median Value by Year Householder Moved Into Unit

    Due to a tabulation error, the Margin of Error (MOE) for select geographies in Detailed Table B25109 is incorrect. The corrected tables will be available in American FactFinder on September 29, 2009. For a list of affected geographies and their correct MOE, go here.

    September 24, 2009
    47 Sex Ratios in the 2003 through 2006 ACS Single-Year and Multiyear Public Use Microdata Sample (PUMS) files

    UPDATE: The 2006 ACS 1-year PUMS files were re-released on December 18, 2009. See Errata Note #50 for details.

    Disclosure avoidance techniques were applied to the 2003 through 2006 ACS 1-year PUMS files to protect the confidentiality of responses. One of these techniques resulted in some inconsistent ratios for the number of men to the number of women (sex ratio) for people age 65 and over. Table 1 below displays 2006 ACS data from Detailed Table B01001 (Sex by Age) for ages 60 and over for the nation and the corresponding data from the 2006 PUMS file. An example of the inconsistency is shown in the 65-66 age group, where the sex ratio estimate is 88, but the ACS PUMS data indicate a sex ratio estimate of 98. The disclosure avoidance technique has been modified to avoid this distortion of age data in future releases of the ACS PUMS files.

    Table 1. 2006 ACS — National
      Detailed Table B01001 PUMS
    Age Group Male Female Sex Ratio Male Female Sex Ratio
    60 and 61 years 2,697,559 2,918,530 92 2,706,706 2,910,160 93
    62 to 64 years 3,773,329 4,179,658 90 3,777,403 4,170,440 91
    65 and 66 years 2,096,170 2,382,333 88 2,135,698 2,176,246 98
    67 to 69 years 2,745,928 3,146,519 87 2,729,950 3,305,076 83
    70 to 74 years 3,835,107 4,730,629 81 3,789,906 4,739,463 80
    75 to 79 years 3,168,881 4,323,137 73 3,130,906 4,301,794 73
    80 to 84 years 2,210,627 3,544,895 62 2,224,316 3,553,166 63
    85 years and over 1,549,962 3,456,816 45 1,602,828 3,504,538 46


    The sex ratio inconsistencies may continue to be seen in any multiyear PUMS files that include the 2005 or 2006 ACS 1-year PUMS, since for the time being, these files remain unmodified due to disclosure risks. This includes the 2005-2007, 2006-2008, 2005-2009, and 2006-2010 Multiyear ACS PUMS files. Table 2 below displays 2005-2007 ACS 3-year data from Detailed Table B01001 (Sex by Age) for ages 60 and over for the nation and the corresponding data from the 2005-2007 3-year ACS PUMS file. Again, looking at the 65-66 age group, the sex ratio estimate is 88, but the ACS PUMS data indicate a sex ratio estimate of 95.



    Table 2. 2005-2007 ACS — National
      Detailed Table B01001 PUMS
    Age Group Male Female Sex Ratio Male Female Sex Ratio
    60 and 61 years 2,818,664 3,043,113 93 2,814,489 3,043,093 93
    62 to 64 years 3,755,146 4,134,836 91 3,761,936 4,136,284 91
    65 and 66 years 2,107,291 2,385,729 88 2,132,081 2,254,679 95
    67 to 69 years 2,750,719 3,174,849 87 2,739,532 3,265,054 84
    70 to 74 years 3,847,793 4,722,629 82 3,814,172 4,726,550 81
    75 to 79 years 3,188,205 4,344,880 73 3,162,983 4,325,507 73
    80 to 84 years 2,212,983 3,554,244 62 2,214,522 3,554,766 62
    85 years and over 1,542,871 3,432,917 45 1,583,384 3,471,096 46


    February 18, 2010
    46 Subject Table S2101 and Base Table B21002 for years prior to 2007, period of military service

    Due to an editing error, veteran's period of service (VPS) was being incorrectly assigned for some individuals. The majority of the errors misclassified some people who reported only serving during the Vietnam Era as having served in the category "Gulf War and Vietnam Era." The remainder of the errors misclassified some people who reported only serving between the Vietnam Era and Gulf War as having served in the category "Gulf War." These errors have been resolved for the 2007 tabulations.

    September 23, 2008
    45 Hanford CA and San Francisco-Oakland CA Urban Areas

    During the processing of data products for the urban areas we discovered the geographic boundaries were incorrect for two of these areas, Hanford CA (code 36703) and San Francisco-Oakland CA (code 78904). Therefore, we are unable to release data products for these urban areas at this time. We are correcting the geographic boundaries in our data files now, and will release the data products as soon as possible.

    August 26, 2008
    44 ACS 2007 data tables removed or altered for Gainesville city, FL and Clearfield county, PA

    There was an unusually large amount of missing data for the group quarters populations in Gainesville city, FL and Clearfield county, PA.  The large amount of missing data coupled with the current edit and imputation procedures resulted in incorrect estimates for residence 1 year ago, earnings, and income for both the group quarters population and the total population.  This spreadsheet file [XLS 31KB] contains the full list of tables, table lines, and geographic areas that will not be released due to this problem.

    August 26, 2008
    43 Phrasing Change to Two Categories in C02003 and B02003

    There was an error in the phrasing for two categories in Table C02003 for the 2005 ACS and the 2006 ACS, and Table B02003 for the 2004 ACS. The data were not affected. The category "Two or more races including Some other race" was revised to read "Two races including Some other race." The category "Two or more races excluding Some other race" was revised to read "Two races excluding Some other race, and three or more races." Please note that the tables prior to 2006 will not be corrected.

    July 14, 2008
    42 ACS 2006 — Summary File - Correction to Sequence 0139

    The ACS Summary File was re-run and re-released because it was discovered that C06010PR was missing from the summary file and the accompanying documentation. In general all Puerto Rico based tables have a non-Puerto Rico counterpart with the exception of C06010PR, which resulted in the missing table. Table C06010PR was placed in sequence 0139, which breaks the ACS summary file rule of forcing collapsed tables to be in the same sequence as the base table (B06010PR is in 0140). The reason that this was done is that there wasn't enough space in sequence 0140 to include C06010PR and still maintain our cell width limit, so we placed it in the nearest logical sequence that fits all of our other rules so as to minimize the total affect on the files that have already been published.

    May 12, 2008
    41 ACS 2000-2006 — PUMS variable SMOCP

    Mobile home costs were omitted in the calculation of selected monthly owner costs (SMOCP) for mobile home owners. In 2003 through 2006 these mobile home costs included costs for personal property taxes, site rent, registration fees, and license fees; in addition to these costs, in 2000 through 2002, these mobile home costs also included installment loan payments. Therefore, the omission of mobile home costs from selected monthly owner costs in 2000, 2001, and 2002 resulted in a larger understatement of selected monthly owner costs for mobile home owners than the omission caused in 2003, 2004, 2005, and 2006. The user can calculate the selected monthly owner costs for mobile home owners by adding the variable MHP (mobile home costs) to SMOCP (selected monthly owner costs) for all cases on which BLD = '01' (mobile homes) to arrive at the selected monthly owner costs for mobile home owners.

    May 7, 2008
    40 ACS 2005 and 2006 - PUMS variable PAOC and Detailed Table B23003 on American Fact Finder (AFF): Update to Errata 39

    The variable PAOC was designed to indicate for women 16 years and over, the presence of an own child in the household (a son or daughter under age 18 and never married). An error was found in the programming of this variable that resulted in the inconsistent identification of women in subfamilies having a child, producing an underestimate of the numbers of women with own children usually in the 1 percent to 2 percent range for each of the states.

    This problem affected the PUMS file and several estimates in Detailed Table B23003. As a result, the PUMS files for 2005 and 2006 will be re-issued with the corrected PAOC variable, and the B23003 tables for 2005 and 2006 have been removed from the AFF along with necessary changes to ACS Summary File. These tables will not be re-issued, but the programming will be corrected for future releases. Please note that the PUMS files and data products for the years prior to 2005 will not be corrected.

    PAOC is also a small part of the editing procedure used to create the employment status recode (ESR). A review concluded that this error affected ESR and some other variables

    April 2, 2008
    39 ACS 2006 - PUMS variable PAOC

    The variable PAOC was designed to indicate for women 16 years and over, the presence of an own child in the household (a son or daughter under age 18 and never married). An error was found in the programming of this variable that resulted in the inconsistent identification of women in subfamilies having a child, producing an underestimate of the numbers of women with own children.

    This problem affects PUMS and may possibly affect other data products. It is currently under review and any updates will be posted as soon as they are available.

    February 11, 2008
    38 ACS 2006 - Subject tables: S0102, S0103, S0102PR, and S0103PR

    Errors were discovered with the median age estimate in four subject tables. However, each of the corrected estimates is within the 90% margin of error of the original estimate. These four subject tables have been corrected and updated data are available on American FactFinder (AFF.)

    December 13, 2007
    37 ACS 2006 - Selected Population Profile: S0201PR - Update to Errata 35

    The 17 iterated Selected Population Profiles (SPP) [XLS 15KB] in Puerto Rico that were missing on American Factfinder (AFF) are now available.

    Also, the error discovered with the medians in the SPPs for 9 new iteration groups [XLS 14KB] has been corrected and updated data are available on AFF.

    October 15, 2007
    36 ACS 2006 - Selected Population Profile: S0201PR

    We discovered that 17 iterated Selected Population Profiles (SPP) [XLS 15KB] ]in Puerto Rico are currently missing on American Factfinder (AFF). However, these tables are available on the ftp site. These tables will be available on AFF very soon.

    Also, an error has been discovered with the medians in the SPPs for 9 new iteration groups [XLS 14KB]. This error will be corrected and updated on AFF very soon.

    October 4, 2007
    35 ACS 2006 - Subject Table: S0506 Selected Characteristics of the Foreign-born Population by Region of Birth: Latin America

    We discovered an error in the calculation of the median age in the column of this table for 'Other Central Americans'. Currently, an "X" is displayed in this cell of the table. The S0506 table with the correct value for this cell will appear in the third ACS2006 data release on September 27, 2007.

    September 12, 2007
    34 Errata note on 2004 and 2005 S2406 table in American FactFinder (AFF)

    For the 2004 and 2005 ACS, the percent of "Self-employed in own not incorporated business workers and unpaid family workers" in "Sales and office occupations" was incorrectly calculated in Table S2406, resulting in an underestimation of this percentage. No other data products were affected by this error. This error has been corrected for future releases of the ACS data files.

    To calculate this percentage in the 2004 and 2005 Table S2406, divide the number of persons who are in "Sales and office occupations" within the "Self-employed in own not incorporated business workers and unpaid family workers" category as shown in Detailed Table B24060 by the total number of persons in the "Sales and office occupations" category as shown in Detailed Table B24060, then multiply that number by 100.

    For guidance in calculating the standard error around this percentage, see page 19 of the ACS Accuracy of the Data (2006) document [PDF 185KB]

    August 28, 2007
    33 ACS 2004 and 2005 Median Family Income Data - Update to Errata 26

    Some of our data products for 2004 and 2005 contained an error which caused median family income's to be understated when they are over $90,000. The 2004 data will not be corrected. The data for 2005 has been corrected and is now available on AFF and on the ftp site. No states were affected by this error; but a small number of counties, townships, cities, and other sub-state geographic entities across the U.S. were affected.

    June 18, 2007
    32 Tables B25111 and B25113 replaced from the American FactFinder

    Some of the median gross rent estimates shown in tables B25111 and B25113 were incorrectly calculated. For these two tables, the error caused the median gross rent estimates in high rent areas to be understated. These tables have been replaced on the American FactFinder with the corrected median estimates and associated standard errors. No other data products were affected.

    May 3, 2007
    31 ACS 2005 data tables removed or altered for Cumberland and Penobscot counties

    This note is related to errata note 30. After further investigation, we have determined the same problem in the collection of the 2005 travel time to work data affected travel time estimates for Cumberland County, New Jersey and Penobscot County, Maine. No other characteristics appear to have been affected. The data tables containing travel time estimates for Cumberland County, New Jersey and Penobscot County, Maine have been removed or altered on the American FactFinder. For each table, an explanatory note is provided for the users. The spreadsheet file referenced in Note 30 below contains the list of all affected tables along with a description of the action taken for each table. For further information, please contact the Journey-to-Work and Migration Statistics Branch at 301-763-2454.

    March 29, 2007
    30 ACS 2005 data tables removed or altered for Coweta County, Georgia

    We have discovered a problem in the collection of the 2005 travel time to work data for Coweta County, Georgia. No other characteristics appear to have been affected. The data tables containing travel time estimates for Coweta County have been removed or altered on the American FactFinder. For each table, an explanatory note is provided for the users. The spreadsheet file [XLS 28KB] contains the list of all affected tables along with a description of the action taken for each table.

    This problem is currently under review and users will be notified as soon as corrected data are available.

    October 20, 2006
    29 Description of the Effects of Corrections to an Error in the ACS 2005 Data Edits

    A minor error was recently discovered in the 2005 ACS sample data. The error affected the data for only 13 sample housing units and 25 sample persons. These 13 sample housing units are in 13 different states (none are in Puerto Rico).

    Due to the nature of the data products tabulations, many tables from the August 29 ACS income and poverty release were affected. However, each of the corrected estimates is within the margin of error of the original estimate. Furthermore, almost all of the corrected estimates represent less than a 1% change from the original estimate. The data products from the August 29 data release that are affected will be re-issued on October 19. All data products included in the October 3rd data release have been corrected in time for that release. There was no effect on the data products released on Aug. 15. And the data products to be released on Nov. 14 (the final ACS data release for this year) are being corrected and verified now. These changes will affect 101 detailed tables (and certain other data products derived from these tables) across 145 geographic entities, about 2% of the roughly 7,000 geographic areas for which the 2005 ACS data products are published. However, many of these geographic areas will have changes in only a few data tables. The spreadsheet file of release 2 corrections [XLS 334KB] contains detailed information on the geographic areas and the data tables affected by this error.

    October 3, 2006
    28 Subject Table Note Error on American FactFinder (AFF)

    The conditional notes for the following subject tables are incorrect: S0102, S0102PR, S0103, S0103PR, S0502, S0502PR, S0503, S0504, S0602, S0803, S0803PR, S0901, S0902, S1001, S1703.

    The note: "Table is not available for the selected geography if the population for the selected subject falls below a threshold of 65,000.," for S0102,S0103, S0502, S0503, S0504, S0602, S0803, S0901, S0902, S1001, and S1703 should read:

    Table is not available for the selected geography if the population for the selected subject falls below a threshold of 1,000,000. Additionally, the population within a geographic area for the selected subject must meet a threshold of 65,000.

    The note: "Table is not available for a selected Puerto Rico geography if the population for the selected subject falls below a threshold of 65,000." for S0102PR,S0103PR, S0502PR, and S0803PR should read:

    Table is not available for a selected Puerto Rico geography if the population for the selected subject falls below a threshold of 1,000,000. Additionally, the population within a geographic area for the selected subject must meet a threshold of 65,000.
    October 3, 2006
    27 Replicate Weights on the 2005 Public Use Microdata Sample Files

    The variables WGTP1...WGTP80 and PWGTP1....PWGTP80 were inadvertently left off of the August 29, 2006 release of the data files and the data dictionary. Replicate weights are being provided with the 2005 PUMS for the first time. Please reference the PUMS Accuracy of the Data (2005) [PDF 160KB] for more information on replicate weights. The corrected files were released on September 11, 2006.

    September 12, 2006
    26 Errata Note on median family income for August 29th Data Release

    Some of our data products for 2005 contain an error that causes median family incomes to be understated when they are over $90,000. We are correcting this problem now, and we will let you know when the corrected data are available on AFF and on the ftp site. No states were affected by this error; but, a small number of counties, townships, cities, and other substate geographic entities across the U.S. were affected.

    August 29, 2006
    25 DRIVESP (used in computing "Workers per car, truck, or van")

    "Workers per car, truck, or van" is the derived measure used to indicate carpooling or vehicle efficiency. It is calculated by dividing the total number of workers who reported using a "car, truck, or van" by the number of "Total vehicles used." The values of number of vehicles for individual workers (DRIVESP) are derived from the JWRIP (ridership variable) as follows:

    IF JWRIP = 1 (Drove alone) THEN DRIVESP = 1.000 vehicles;
    ELSE IF JWRIP = 2 (In a 2-person carpool) then DRIVESP = 0.500 vehicles;
    ELSE IF JWRIP = 3 (In a 3-person carpool) THEN DRIVESP = 0.333 vehicles;
    ELSE IF JWRIP = 4 (In a 4-person carpool) THEN DRIVESP = 0.250 vehicles;
    ELSE IF JWRIP = 5 or 6 (In a 5- or 6- person carpool) THEN DRIVESP = 0.200 vehicles;
    ELSE IF JWRIP = 7 - 10 (In a 7-or-more person carpool) THEN DRIVESP = 0.143 vehicles;
    ELSE DRIVESP = blank (nonworker or worker who does not drive to work).

    The sum of DRIVESP is the estimated number of "Total vehicles used" by those workers who used a "car, truck, or van." Thus, "workers per car, truck or van" is the sum of all workers who reported using a "car, truck, or van" (JWTR = 1) divided by the sum of DRIVESP for all such workers.

    August 29, 2006
    24 B24081, B24082, B24091, B24092

    The Class of Worker status "unpaid family workers" may have earnings. Earnings reflect any earnings during the 12 months prior to the ACS interview. The Class of Worker status reflects the job or business held the week prior to the ACS interview, or the last job held by the respondent.

    Aug 15, 2006
    23 Statistical Area Definitions (Data Profiles, Selected Population Profiles, Detailed Tables, Subject Tables, and Geographic Comparison Tables)

    Current residence, residence 1 year ago (migration), and place of work tabulations use the November 2004 Statistical Area Definitions for Metropolitan Statistical Areas, Metropolitan Divisions and Principal Cities, Micropolitan Statistical Areas, Combined Statistical Areas, New England City and Town Areas (NECTA), Combined NECTAs, and NECTA Divisions and Principal Cities. For more information on Statistical Area Definitions, see http://www.census.gov/population/metro/data/metrodef.html.

    Aug 15, 2006
    22 Detailed Tables B084xx and B085xx series and Subject Table S0804 ("Workplace Geography" tables )

    These tabulations are produced to provide estimates of workers at the location of their workplace. Estimates of counts of workers at the workplace may differ from those of other programs because of variations in definitions, coverage, methods of collection, reference periods, and estimation procedures. The ACS is a household survey that provides data pertaining to individuals, families, and households.

    These workplace-based tabulations are only available for States; Counties; Places; County Subdivisions in selected states (CT, ME, MA, MI, MN, NH, NJ, NY, PA, RI, VT, and WI); Combined Statistical Areas; Metropolitan and Micropolitan Statistical Areas, and their associated Metropolitan Divisions and Principal Cities; Combined New England City and Town Areas; New England City and Town Areas, and their associated Divisions and Principal Cities.

    Aug 15, 2006
    21 ACS educational attainment variable SCHL of Data Dictionary for Survey Year 1999-2004 Public Use Microdata Sample Files

    The data dictionary shows incorrect category labels for the educational attainment variable (SCHL). The educational attainment question changed on the 1999 ACS questionnaire, which changed the response categories and eliminated the choice of "Vocational, technical, or business school degree." The PUMS data dictionary incorrectly shows labels for categories 10 and 11 as "Some college, but no degree" and "Vo/Tech/Bus school degree," respectively. The correct data dictionary labels for categories 10 and 11 are "Some college, but less than 1 year" and "1 or more years of college, no degree," respectively.

    May 18, 2006
    20 Base Table B16009 "Poverty Status in the Past 12 Months by Age by Language Spoken at Home for the Population 5 Years and Over," 2004 American Community Survey

    There was an error in the designation of the categories "Income in the past 12 months below poverty level" and "Income in the past 12 months at or above poverty level." Data for the category "below poverty" were shown for the category "at or above poverty" and vice versa. The corrected table was released on February 23, 2006.

    March 6, 2006
    19 Subject Table S2201 for the 2004 American Community Survey, "Food Stamps".

    There was a calculation error in the data for the category "With children under 18 years," in Subject Table S2201. Because of the error, the incorrect percent was shown for this category. The table has been corrected as of February 23, 2006 and only the corrected version is now available.

    Feb 22, 2006
    18 Subject Table S2303 for the 2004 American Community Survey, mean and median earnings for full-time, year-round workers 16 years and over with earnings.

    There was a calculation error in the data for the median and mean earnings categories for full-time, year-round workers 16 years and over with earnings, in Subject Table S2303. Because of the error, these categories displayed earnings data for all workers 16 years and over with earnings, rather than for the intended subset of workers who worked full time, year round. The table will be corrected on February 23, 2006.

    Feb 16, 2006
    17 Subject Table S2302 for the 2004 American Community Survey, "Employment Characteristics of Families".

    There was a calculation error in the data for the categories "Both husband and wife in labor force," and "Husband in labor force, wife not in labor force," in Subject Table S2302. Because of the error, data for households in which the husband was unemployed were excluded from the calculations for each of these categories. The table will be corrected on February 23, 2006.

    Feb 16, 2006
    16 Imputation of citizenship status shown in data files, including American Community Survey (ACS) detailed table P131 for 2000-2003, B99051 for 2004, and ACS PUMS files 2000-2004.

    There is an error in the way the imputation flag for citizenship was set. This error led to an understatement of the number of people for whom citizenship was imputed. People who had their place of birth (i.e., country of birth) imputed as the United States, Puerto Rico, Guam, the U.S. Virgin Islands, or the Northern Marianas should also have had their citizenship flag set to imputed. However, this did not occur. This error will be corrected in future releases of the ACS data files.

    Jan 11, 2006
    15 2003-2004 PUMS data for veterans, 2003 ACS PUMS Ancestry code change.

    Re-release of 2003 ACS PUMS:

    1. The file has been re-run to correct inconsistencies in the data for veterans.
    2. Ancestry code 593 (Other Sub-Saharan African) was changed to 587 (Other Sub-Saharan African).

    Re-release of 2004 ACS PUMS:

    1. The file has been re-run to correct inconsistencies in the data for veterans.
    Jan 2, 2006
    14 Removal of "Other Pacific Islander" data line in the 2004 single year and multi-year profile.

    The "Other Pacific Islander" estimate in the 2004 single year and multi-year profiles has been removed from the American Factfinder website. Once revisions are complete, this estimate will be available again on American Factfinder.

    Summer 2005
    13 Removal of PCT004 and PCT005

    Due to an error, American Community Survey core tables PCT004 and PCT005 were not restricted to the correct population subgroup for the years 2000, 2001, 2002, and 2003. Therefore, these core tables have been removed from the American Factfinder website. Once revisions are complete, these tables will be available again on American Factfinder.

    Winter 2004
    12 Modification Made in 2003 Weighting Method

    To ensure high quality data, we continuously review the estimates produced by the American Community Survey. Whenever anomalies are discovered, we investigate to learn and find out its causes and make methodological changes, as appropriate, to improve the ACS estimates. These changes in methodology may result in large differences in ACS estimates for a small number of geographic areas. Since ACS weighting is controlled at the county level, small changes in methodology are more likely to affect sub-county estimates. For example, a modification in the weighting methodology to improve sub-county estimates resulted in an unexpected large drop in the estimates of housing units for Anaheim, California. This modification was implemented in 2003. The large drop in the housing unit estimate occurred in 2003 from levels estimated in 2001 and 2002.

    Implemented in 2003
    11 Average family size, average household size of owner-occupied unit, and average household size of renter-occupied unit in the 2000 to 2001 Supplementary Survey Margin of Error

    We discovered a calculation error that caused a gross underestimation of Average Family Size, Average Household Size of Owner-occupied Unit, and Average Household Size of Renter-occupied Unit in the 2000 to 2001 Supplementary Survey Margin of Error. This error only occurred in the following geographic areas:

    • Houston City, Harris County pt., Texas
    • Harris County, Texas
    • Franklin County, Ohio
    • Broward County, Florida
    • Bronx County, New York

    The profiles have been corrected as of December 3, 2002 and only the corrected versions of these profiles are available.

    Dec 3, 2002
    10 Median Family Income in the 2000 to 2001 Margin of Error

    We discovered a calculation error which caused a gross underestimation of Median Family Income in the 2000 to 2001 Margin of Error. This error only occurred in the Primary Metropolitan Statistical Areas (PMSA). The profiles have been corrected as of November 13, 2002 and only the corrected versions of these profiles are available.

    Nov 13, 2002
    9 Revised Estimates for Census 2000 Supplementary Survey

    The American Community Survey is continuously introducing methodological improvements to maximize the quality of the estimates. Based on results from the survey evaluation program we continue to make changes and improve the estimation methodology. The difference in the estimates from previous releases is a result of revised edits, and reweighting the data using an improved estimation methodology.

    The 109 core tables have been corrected as of November 7, 2002 and only the corrected versions of these tables are available.  Over the next few months, the noncore tables will be updated as well, but until then there may be inconsistencies within the Census 2000 Supplementary Survey data.

    Users may find inconsistencies in estimates for areas which are in the American Community Survey as well as in the Supplementary Surveys. The 2000 American Community Survey estimates are currently being revised and will be replaced shortly.

    Nov 7, 2002
    8 Household and Family Tables

    The household and family tables [PDF 25KB] were tabulated using the housing unit weight instead of the person weight of the householder used in the previous release. As a result of this change, the number of households will equal the number of occupied housing units but will not equal the number of householders, as it was the case in the previous release. This change results in more consistent data. This change affects 31 summary tables, the tabular and narrative profiles, and the Median Household Income rank table.

    Nov 7, 2002
    7 Year Structure Built

    In the previous release of table H031 and the Profile of Selected Housing Characteristics the label designations for the two most recent year-built categories were specified incorrectly. The correct label specifications are "1999 or later" and "1995 to 1998" rather than "2000 or later" and "1995 to 1999".

    May 2, 2002
    6 Median Rooms

    This current release of Median Room data has changed from the previous release, and table H021 and profile table 4, Profile of Selected Housing Characteristics, have been corrected as of March 25, 2002. Only the corrected versions of these tables are available.

    In computing median rooms, the whole number is used as the midpoint of the interval; thus the category "3 rooms" is treated as an interval ranging from 2.5-3.5 rooms. Linear interpolation is used to estimate median rooms between the lower and upper bounds of a specified interval. Median rooms is rounded to the nearest tenth.

    In the previous release of the American Community Survey data, the midpoint, rather than the lower value of the interval, was incorrectly used as the starting value for the derivation of median rooms. For the category "3 rooms," we previously used the interval 3.0-4.0 rooms.

    May 2, 2002
    5 Household and Family Tables

    The American Community Survey household and family tables [PDF 25KB] were reweighted using the person weight of the householder instead of the housing unit weight used in the previous release. Because of this change, the number of households will equal the number of householders, which was not previously the case. This change affects 31 summary tables, the tabular and narrative profiles, and the Median Household Income rank table.

    May 2, 2002
    4 The Agriculture, Forestry, Fishing and Hunting Sector

    This current release of Industry and Occupation data has changed from the previous release, and tables P066, P067 and P068, as well as profile table 3, Profile of Selected Economic Characteristics, and the narrative profiles, have been corrected as of March 25, 2002. Only the corrected versions of these tables are available. The American Community Survey Industry data follow the guidelines issued in Clarification Memorandum No. 2, "NAICS Alternate Aggregation Structure for Use by U.S. Statistical Agencies," issued by the Office of Management and Budget.

    May 2, 2002
    3 Narrative Profiles released in August 2001

    Narrative Profiles released in August 2001 contained an error. In the first section (POPULATION), the sentence beginning "For people reporting one race..." had percentages with the total population as the denominator. The profiles released in November 2001 have recomputed percentages with the population reporting one race as the denominator. The race and Hispanic origin percentages in the following sentences were correct.

    November 20, 2001
    2 The Agriculture, Forestry, Fishing and Hunting Sector

    The Agriculture, Forestry, Fishing and Hunting Sector in the previous release did not comply with 1997 North American Industry Classification System (NAICS). This current release of Industry and Occupation data has changed from the previous release, and tables P066, P067 and P068 have been corrected as of November 20, 2001. Only the corrected versions of these tables are available. However, the industry data in the current release do not strictly adhere to the coding structure guidelines recently issued by the Office of Management and Budget. Future industry products will follow NAICS classification structure as designated in the May 15, 2001, NAICS Clarification Memorandum No. 2, "Alternate Aggregation Structure for Use by U.S. Statistical Agencies."

    November 20, 2001
    1 Median Gross Rent, Median Value, and Median Selected Monthly Owner Costs

    Processing errors were discovered in the median tables H061 (Median Gross Rent), H074 (Median Value) and H085 (Median Selected Monthly Owner Costs). This also affects the Profile of Selected Housing Characteristics, and the last paragraph (Housing Costs) of the Narrative Profile. The tables have been corrected as of August 28, 2001 and only the corrected versions of these tables are available.

    August 28, 2001

    [PDF] or PDF denotes a file in Adobe’s Portable Document Format. To view the file, you will need the Adobe® Reader® Off Site available free from Adobe.    [Excel] or the letters [xls] indicate a document is in the Microsoft® Excel® Spreadsheet Format (XLS). To view the file, you will need the Microsoft® Excel® Viewer Off Site available for free from Microsoft®.    This symbol Off Site indicates a link to a non-government web site. Our linking to these sites does not constitute an endorsement of any products, services or the information found on them. Once you link to another site you are subject to the policies of the new site.

    Source: U.S. Census Bureau | American Community Survey Office | Email ACS | Last Revised: June 27, 2014
    Give us your feedback on this website!