Data sources and partners: Drinking water
August 29, 2025
US Environmental Protection Agency, DWMAPS
The Drinking Water Mapping Application to Protect Source Waters, or DWMAPS, is the U.S. Environmental Protection Agency’s online mapping tool to help you find information about protecting sources of drinking water. DWMAPS provides easy access to information about drinking water providers, sources of drinking water, potential sources of contamination, polluted waterways, and watershed protection projects.
DECinfo Locator
DECinfo Locator is an interactive map that lets you access Department of Environmental Conservation documents and public data about the environmental quality of specific sites in New York State, as well as outdoor recreation information. This tool and available information are maintained by the DEC.
Riverkeeper Water Quality Portal
Use this interactive map to explore water quality throughout the Hudson River watershed with data that Riverkeeper and our partners collect. Dive into when and where it is safe to swim and boat, how clean your drinking water is, and the health of the region's fish.
Related campaigns
Protecting Hudson River watershed drinking water at the source
Riverkeeper ensures that drinking water sources stay clean and safe through vigilant advocacy and conservation efforts
New York City drinking water
The water supply for 9.5 million New Yorkers depends on keeping our watersheds clean and protected
Emerging and unregulated contaminants
Toxic chemicals can harm the health of people, wildlife, aquatic ecosystems