Watershed Management photo identifier

Watershed Management

Watershed Management Updates by (WRIA)

This page is maintained as an archive of past information and is not being updated.

A total of 44 planning units initiated Watershed Plan development with State funding between 1998 and 2012.  Watershed plans were adopted by 33 planning groups.  A few of these groups continue to implement priority actions from their Watershed Plans.

Select a WRIA of interest from the list in the left column or from the map below to view Watershed Management efforts for the watershed.  If you don't know your WRIA you can use the select a watershed by Zip Code and then return here to select from the list or map.

Where are instream flows set around the state?

For more information

Why watersheds are important, what threatens watershed health, things you can do, local examples of watershed stewardship, contacts for more information on various watershed topics, and more, see Working for Washington's Future: Healthy Watersheds, Healthy People.


  • See county contacts on individual WRIA pages from links above.

A "watershed" is an area draining into a river, lake, or other waterbody. Ecology and other state natural resources agencies have divided the state into 62 "Water Resource Inventory Areas" or "WRIAs" to delineate the state's major watersheds.  Federal agencies frequently use an alternative watershed system based on USGS Cataloging Units or "HUCs" (Hydrological Unit Code).  The federal system is similar to the WRIA system except that the basin groupings differ and the units extend beyond the Washington state boundary into Canada, Oregon, and Idaho.









Puget Sound

Columbia River

Spokane River Basin


Instream flows

Toxics cleanup site information

Water Cleanup Plans (TMDLs)