The U.S. Environmental Protection Agency (EPA) conducts the Community Water System (CWS) Survey to obtain data to support the development and evaluation of drinking water regulations. The vast majority of systems are small and privately owned, but most people are customers of large publicly-owned systems. This report identifies trends and key findings from the survey.

• Water system size
• Water source
• System ownership category
• Treatment practices
• Storage and distribution
• Financial characteristics

 The available surveys were conducted in 2006, 2000, and 1995.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

2006 Survey

• 2006 Community Water System Survey Volume I: Overview (PDF)February 2009, EPA-815-R-09-001 
• 2006 Community Water System Survey Volume II: Detailed Tables and Methodology (PDF)May 2009, EPA-815-R-09-002
• 2006 Community Water System Database (zip file)(1 pg, 3 MB)

2000 Survey

• 2000 Community Water System Survey Volume I: Overview (PDF)December 2002, EPA 815-R-02-005a
• 2000 Community Water System Survey Volume II: Detailed Tables and Survey Methodology (PDF)December 2002, EPA 815-R-02-005b
• 2000 Community Water System Database (zip file)(1 pg, 2 MB)

1995 Survey

• 1995 Community Water System Survey Volume I: Overview (PDF)January 1997, EPA 815-R-97-001a
• 1995 Community Water System Survey Volume II: Detailed Survey Result Tables and Methodology (PDF)January 1997, EPA 815-R-97-001b
• 1995 Community Water System Survey Database (zip file)(1 pg, 3 MB)