The U.S. Census Bureau is committed to providing high quality data in a prompt and efficient manner to our customers. Automated retrieval programs (commonly called "robots" or "bots") have caused delays that can negatively impact other customers' timely access to information. Therefore, excessive robot activity on Census websites is prohibited.
The U.S. Census Bureau blocks robot activity considered excessive, malicious, or degrading service to others in any way. For example, robots attempting to access or download survey information multiple times per second will be limited. Also, Robots using an IP address (for example, 146.142.xx.xx) instead of the official Census URL (such as www.census.gov or data.census.gov) may not receive data promptly at prescribed times. The U.S. Census Bureau reserves the right to block robot activity missing owner information. Please note that blocking and rate limiting may occur in real time.
