Industrial Stormwater General Permit
Stormwater can pick up pollution from factories and businesses. Those contaminants are carried into waterways and harm fish and other aquatic life. The National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge permit helps industrial facilities comply with federal and state regulations that reduce pollution. We require most industrial sites in Washington to monitor, measure, and reduce stormwater pollution leaving their site. We use the federal Clean Water Act and state law (RCW 90.48.080) to regulate stormwater at industrial facilities.
The permit went into effect on Jan. 1, 2025 and expires Dec. 31, 2029.
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Current permit documents
Transportation facility
Public involvement during permit reissuance
We invited comments on the draft Industrial Stormwater General Permit documents from May 15 to July 15, 2024. We conducted two public workshops followed by public hearings on June 20 and 24, 2024. Appendix C of the fact sheet shows our response to comments or you can view the comments in our online database.
Related links
Contact information
Permit Administrator - by county of permit project
King (except city of Seattle)
Alyssa Brewer
564-669-4922
alyssa.brewer@ecy.wa.gov
City of Seattle, Chelan, Clallam, Douglas, Island, Jefferson, Kittitas, Pacific, San Juan, Skamania, Spokane, Whitman
Max Graham
564-200-2505
max.graham@ecy.wa.gov
Adams, Asotin, Benton, Columbia, Franklin, Garfield, Grant, Grays Harbor, Kitsap, Skagit, Thurston, Walla Walla
Jasper Sogn
360-972-6524
jasper.sogn@ecy.wa.gov
Cowlitz
Joyce Smith
360-628-2138
joyce.smith@ecy.wa.gov
Ferry, Lincoln, Mason, Okanogan, Pend Oreille, Snohomish, Stevens, Wahkiakum, Yakima
Collin Smith
564-669-9319
collin.smith@ecy.wa.gov
Clark, Lewis, Klickitat
Jen Smith
360-584-8214
Jen.smith@ecy.wa.gov
Pierce, Whatcom
Melinda Wilson
360-870-8290
melinda.wilson@ecy.wa.gov
Shannon McClellan
Permit Writer
360-280-8370
Shannon.McClellan@ecy.wa.gov
Clay Keown
CNE Coordinator
360-480-3353
clay.keown@ecy.wa.gov