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Water Data Systems

Data Systems

The following data system supports the enforcement and compliance assurance program under the Clean Water Act and the Safe Drinking Water Act.

System Modernization Underway ..Learn more

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The Safe Drinking Water Information System/Federal (SDWIS/FED) version is EPA's national data base for the Public Water System Supervision program. It includes inventory, compliance, and enforcement information on the nation's 170,000 public water systems. SDWIS/FED is an exceptions based system that for the most part receives data directly from SDWIS/STATE or data transfer from a state's system. The SDWIS/STATE version was designed for the states to help implement the drinking water program and fulfill EPA's reporting requirements. The Significant Non Compliance (SNC) Exceptions Tracking System (SETS) is a sub-system of SDWIS/FED that generates/tracks significant non-compliers. SDWIS is in the initial stage of modernization by the Office of Water.

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