Data Management

EPA maintains drinking water data in several databases.  It uses this information to help manage environmental programs, and provides public access to the data through the Internet.  Other water-related databases are maintained in other parts of EPA.

Safe Drinking Water Information System - Federal version (SDWIS/FED): SDWIS/FED is EPA's national regulatory compliance database for the drinking water program.  It includes information on the nation's 170,000 public water systems and violations of drinking water regulations. 

• Access Drinking Water Information Online (through summary pivot tables, Envirofacts, or direct connection to the mainframe)
• SDWIS/FED Website (information for users who work with the database)

Safe Drinking Water Information System - State Version(SDWIS/State):
SDWIS/State is a data system developed by the EPA for states that aids in maintaining the quality of drinking water information.

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This site maintained by the Regulatory Development and Compliance Program. Please address any comments or questions
to the program or the webmaster.