DWMAPS

Drinking Water Mapping Application to Protect Source Waters

* EPA was recently made aware that some searches of public water systems are returning incomplete results. EPA is working to resolve the issue as quickly as possible.


What is the Drinking Water Mapping Application to Protect Source Waters (DWMAPS)?

Welcome page of DWMAPS includes prompts to guide users through queries about their drinking water sources.Welcome page of DWMAPS includes prompts to guide users through queries about their drinking water sources.The Drinking Water Mapping Application to Protect Source Waters or DWMAPS is EPA’s online mapping tool to help you find information about drinking water in your community. This user-friendly tool provides answers to questions like:

  • Who supplies my drinking water?
  • Is the source of my drinking water polluted?
  • Are there possible sources of pollution near my drinking water that might be affecting my community's water supply?
  • How can I get involved in protecting sources of drinking water in my community?

How can DWMAPS be used to protect sources of drinking water?


DWMAPS can provide drinking water professionals, Source Water Collaboratives, watershed groups, and others with information to update source water assessments and prioritize source water protection measures in any location or watershed in the country. Specifically, DWMAPS helps users to:

  • Results of a search for all facilities with permits to discharge materials within watersheds up to 24 hours upstream of Pittsburgh, PAResults of a search for all facilities with permits to discharge materials within watersheds up to 24 hours upstream of Pittsburgh, PAIdentify potential sources of contamination in locations defined by users;
  • Find data to support source water assessments and plans to manage potential sources of contamination;
  • Evaluate accidental spills and releases, identifying where emergency response resources for accidental releases must be readily available; and
  • Promote integration of drinking water protection activities with other environmental programs at the EPA, state, and local levels.

DWMAPS does not display the actual locations of Public Water System facility intakes but contains a wide variety of data useful to protection of drinking water sources.


Access DWMAPS and User Guide


For questions regarding DWMAPS navigation, write to dwmaps@epa.gov.