Analyze Trends: EPA/State Drinking Water Dashboard

The Safe Drinking Water Act (SDWA) ensures the quality of Americans' drinking water by regulating public water systems (PWS). Under SDWA, EPA sets standards for drinking water quality and oversees the states, federally-recognized tribes, and territories that implement the drinking water program. EPA and the other implementing authorities have authority to initiate enforcement responses against individual PWS that violate drinking water standards.


The SDWA Dashboard provides an overview of the SDWA regulatory activities of EPA and the implementing states, tribes, and territories. The dashboard provides an easy-to-use summary of key activities to answer questions like: which PWS are regulated, how many PWS have been inspected, how many systems have had alleged violations identified and enforcement action taken, and how many systems have returned to compliance. Users should not use the SDWA Dashboard to learn the up-to-the-minute compliance status of particular violations. For that information, contact the implementing authority (EPA, state, tribe, or territory) that regulates your specific PWS, or contact your local PWS directly.

See important information about the data. Use the "View More" menus at the top of each section to see additional charts. Access and download detailed data by clicking on bars of each chart.

National Drinking Water Activity Dashboard

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Common Questions

Where do the data come from?Where are the dashboard terms defined?What caveats should I know about the data in the SDWA dashboard?What is a public water system?What are the various types of SDWA violations shown in the dashboard?What is the state's role in ensuring compliance with SDWA Public Water System Supervision Program requirements?How do primacy agencies respond to noncompliance?What does "serious violator" mean?

About the Data

EPA is aware that the completeness and accuracy of state data are variable, and without investigation and program knowledge, data can be misleading or misinterpreted. Often, there is important context around data that must be taken into account to provide an accurate picture. For example, not all activities and violations may be required to be reported to EPA, and current year data may still be in the process of being reported.


Activities and Violations

Data shown in the State Dashboards are based on data reported to EPA and may not reflect all compliance monitoring/inspections, enforcement or the full extent of noncompliance within a state. State environmental agencies may have more information on activities and noncompliance within their state on their agency websites.

Enforcement actions considered "enforcement sensitive" (in development) are counted on the charts; however, they are not listed in the drilldowns.

Chart Legends

"State" in chart legends refers to a state, territory, EPA region that directly implements the drinking water program for Indian country, or tribe that EPA has approved for treatment as a state (to date, the Navajo Nation), depending on your menu selection.

Current Year

The most recent federal fiscal year may not show a complete dataset because it has not yet been verified or the year is not completed.

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