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- Chapter 173-200
WAC: Water quality standards for groundwater in the State of Washington
This website presents the state regulations for groundwater quality.
Specific water quality criteria for groundwater are presented in
Washington Groundwater Quality Criteria.
- Washington State Department of Health Drinking Water Program
Many of the public water supply systems in the state derive their water from groundwater wells. Visit this page to learn more about the state’s programs that oversee water quality from these systems. Don’t forget to also visit the
Drinking Water System page for access to source information about these wells.
Division of Geology and Earth Resources (WDGER) State
Geologic Information Portal
The Washington State Geological Information
Portal provides geological maps, data, and related information through the
internet using interactive geographic information system technology.
Access to information about the Washington Department of Natural Resources geology-related
publications, including an up-to-date listing of geologic reports and maps.
Many of these publications are available on-line.
- WDGER Digital Bibliography
A searchable bibliography of geologic reports published about Washington State.
- WDGER Geologic Map Index
A complete, geo-referenced index of geologic and geophysical mapping of Washington.
Interactive Geologic Quadrangle Index - Larger Scale
An interactive map of available
Washington State geologic quadrangles at the 1:500,000, 1:250,000, and 1:100,000 scales.
WDGER Interactive Geologic Quadrangle Index - 1:24,000 (7.5 minute) scale
Published and in-preparation geologic maps for 7.5-minute (and select
Northwest Center for Geologic Mapping Studies
For geologic maps from the central Puget Lowland area specifically.
The Center has recently been closed due to budget cuts, but you can still access
their maps and borehole data.
- State of Washington Water Research Center (SWWRC) Groundwater Report List
Based in Pullman, WA, the SWWRC assembles research on a wide variety of water resource topics, including groundwater issues. Search the Center's online publication list for groundwater or hydrogeochemistry reports in PDF format.
The SWWRC has also held several conferences focused on water resources in the
Northwest - see conference proceedings for
Groundwater Under the Pacific Northwest - Integrating Research, Policy, and Education, Stevenson, WA, Nov. 2-3, 2005,
and Water in the
Pacific Northwest - Moving Science into Policy and Action, Stevenson, WA,
November 7-8, 2007.
- Washington State
Department of Licensing Geologist/Hydrogeologist Licensing Program
Since 2001, most people conducting groundwater work in Washington State must
hold a valid state license as a hydrogeologist
or engineer, or work for someone who holds such a license (certain exemptions
apply). Visit the link above to learn more about the state licensing
program requirements and exemptions.
- Impacts of Climate Change on Groundwater Resources:
A Literature Review
This 2007 report was prepared by a University of Washington Climate Impact Group
technical committee, with a focus on evaluating potential changes on groundwater
conditions in the Puget Sound area that may result from a changing climate.
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- U.S. Geological Survey (USGS) - Water Resources of Washington State
The USGS is involved in a wide variety of groundwater investigations across
Washington. To search the USGS on-line report bibliography for Washington, go to
USGS on-line Bibliography search.
Alternatively, you can search by project topic, or project location, by visiting
the USGS Water Science Center Projects
and Studies page.
- USGS NWISWeb Data for Washington
High quality historic data for groundwater in Washington is available at the U.S. Geological Survey’s National Water Information System (NWIS) web site.
U.S. Environmental Protection Agency (USEPA) Region 10 Ground Water Protection Unit
Visit this web site to access information regarding the USEPA’s regional groundwater protection activities.
- Spokane Valley-Rathdrum Prairie Aquifer Study
The USGS is leading a study of one of Washington’s major aquifer systems, in
cooperation with the Washington Department of Ecology, the Idaho Department of Water Resources, the City of Spokane, and others. Visit this home page for more information about this important study.
(Ecology contact: Guy Gregory, email@example.com; 509-329-3509)
- Yakima River Basin Groundwater Study
The USGS is conducting a major study of the groundwater system of the Yakima
River Basin, in cooperation with the U.S. Bureau of Reclamation, the Washington Department of Ecology, and the Yakama Indian Nation. (Ecology contact:
Tom Mackie; firstname.lastname@example.org;
Watershed Groundwater Study
In cooperation with the Chehalis Basin Partnership and the
Washington Department of Ecology, the USGS is conducting a study of the
groundwater system in the second largest basin in Washington state.
(Ecology contact: Charles Pitz; email@example.com; 360-407-6775).
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If you have any suggestions about additional resources to add to this page, please contact: Charles Pitz (firstname.lastname@example.org).
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.