Eastern Washington Stormwater Group

Information sharing and networking for Phase II Municipal Stormwater Permittees including Asotin, Asotin County, Clarkston, Pullman, Spokane, Spokane County, Spokane Valley, Moses Lake, Wenatchee, East Wenatchee, Douglas County, Chelan County, Ellensburg, Yakima, Yakima County, Selah, Union Gap, Sunnyside, Pasco, Kennewick, Richland, West Richland, Walla Walla County, City of Walla Walla, and Washington State University.


EWSG Chair: Shilo C. Sprouse, CSI, CESCL, CIty of Pullman 509-338-3140

Upcoming Meetings

Regular Meetings are scheduled for the 2nd Thursday of every month.

Documents and Presentations

Eastern Washington Stormwater Group By-Laws (May 10, 2018)

Eastern Washington Stormwater Group Ground Rules (May 10, 2018)

City of Yakima - Stormwater Underground Injection Control Retrofit Program (May 23, 2013)

Announcing the public comment period for the SWMMEW

Ecology is pleased to announce the release of the Draft Stormwater Management Manual for Eastern Washington (SWMMEW) for public comment.