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Drinking Water Mapping Application (DWMA) - Public Version

Published by U.S. EPA Office of Water (OW) | U.S. Environmental Protection Agency | Catalog Last Checked: May 06, 2026 at 12:50 AM | Dataset Last Updated: December 15, 2006 at 12:00 AM
The Drinking Water Mapping Application (DWMA) is a web-based geographic information system (GIS) that enhances the capabilities to identify major contaminant risks to public drinking water supplies. The DWMA includes functionality for both surface and ground-water based public water systems, including a well visualization tool (under development), non-point source and non-NHD data layer analyses, and multi-program analyses.

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