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.

Diagram is a cross-section of landform showing groundwater and its place in the water cycle as it interacts with streams, basins, trees, and the atmosphere. Groundwater is a key part of the system. — 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

EIM groundwater search is part of our Environmental Information Management system and contains data from groundwater studies.
Well log search is a database of all records about wells on file with the state.
Geographical Information Systems (GIS) data offers access to a GIS spatial dataset of wells in Washington.

Department of Natural Resources

Washington Division of Geology and Earth Resources (WDGER) Geologic Information Portal at the Department of Natural Resources provides geological maps, data, and related information through the internet using interactive geographic information system technology.
WDGER Publications | Digital Bibliography of geologic reports | Geologic Map Index and subsurface information.

U.S. Geological Survey

U.S. Geological Survey (USGS) - Water Resources of Washington State is a page about the many groundwater investigations USGS conducts across Washington.
USGS online bibliography search offers search for reports on Washington state.
USGS NWISWeb Data for Washington contains high-quality historic data for groundwater in Washington at the U.S. Geological Survey’s National Water Information System website.

Washington State Department of Licensing Geologist/Hydrogeologist Licensing Program informs about the state licensing program for hydrogeologists or engineers who work with groundwater, including requirements and exemptions.
Online Abstracts from the Biennial Symposium on the Hydrogeology of Washington State —1995-2015 offers abstracts from posters and talks are currently available online as PDF files for Symposia 1 through 12.