Groundwater resources

Looking for information related to the health of underground aquifer resources? We work with many entities and agencies that conduct research and provide additional information related to the use and health of groundwater. You'll find useful links for local information, wells, maps, drinking water, and hydrogeology here.

Click to enlarge groundwater model.

Local information

Our local groundwater information page will help you find information available in your county or jurisdiction.

Data, wells, and maps

Drinking water

Department of Health

  • The Drinking Water Program at Washington State Department of Health oversees water quality in public water-supply systems in the state that derive their water from groundwater wells.
  • Drinking Water System Data at the Department of Health provides basic data about public water systems, such as its address, population, connections, and source information.


Department of Natural Resources

U.S. Geological Survey

Professional education