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Water: Public Water Systems

Community water system survey

The U.S. Environmental Protection Agency (EPA) conducted the 2006 Community Water System (CWS) Survey to obtain data to support its development and evaluation of drinking water regulations. Most of the operating characteristics of community water systems are unchanged from 1976, when the first CWS Survey was conducted. The vast majority of systems are small and privately owned, but most people are customers of large publicly owned systems. Nevertheless, there have been some important changes since the first CWS Survey. This publication reports on trends and key findings from the survey.

2006 Community Water System (CWS) Survey

The CWSS Data (Access) files are available in Microsoft Access format. To use these files you will need to have Microsoft Access software installed on your computer. You can also view the data via a free Access "viewer".
Please also visit the Microsoft Access Support site for help in using Access software. Exit EPA Disclaimer

2000 Community Water System (CWS) Survey

1995 Community Water System (CWS) Survey

For more information, contact the Safe Drinking Water Hotline at 1-800-426-4791. Hardcopies of this publication may be ordered from NCEPI or the Water Resource Center.

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

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