Industrial Stormwater General Permit
Submitting an application
We have transitioned to a modern work environment. To expedite application processing, please scan or take a photo of all permit forms and email them to our resource mailbox at: ecyrewqianoi@ecy.wa.gov. Also, you must mail the original, signed documents to:
Water Quality Program
PO Box 47696
Olympia, WA 98504-7696
We are currently emailing all coverage documents and permit related information to the permittee on file.
If you have any questions, contact us at the email addresses below.
Stormwater can pick up pollution from factories and businesses. Those contaminants are carried into waterways and harm fish and other aquatic life. The Industrial Stormwater General Permit (ISGP) 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.
The current permit expires Dec. 31, 2024. The new permit is effective on Jan. 1, 2025, and expires Dec. 31, 2029.
Join our email list to receive updates about this permit.
Permit documents
2020 Industrial Stormwater General Permit (expires Dec. 31, 2024)
- Current general permit (effective Jan. 1, 2020)
- Errata sheet
- Appendix 3: SWPPP certification form
- Appendix 4: Existing discharges to impaired waters
Choose "Industrial Stormwater 303(d)" from the "Report Details" drop-down. - Appendix 5: Dischargers subject to TMDL requirements
- Fact sheet (for the draft 2020 permit)
- Small Business Economic Impact Analysis
2025 Industrial Stormwater general permit (effective Jan. 1, 2025)
Permit reissuance
We are pleased to announce the reissuance of the Industrial Stormwater General Permit on Dec. 2, 2024. A formal announcement was published in the Washington State Register on Nov. 20, 2024.
Transportation facility
Public involvement
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. During the public workshops in June, we explained the proposed changes to the permit and answered questions. The public hearings began immediately following the workshops and ended after verbal testimony. Appendix C of the fact sheet shows our response to comments we received.
Related links
Contact information
Permit Administrator
Your Permit Administrator is determined by the county of the permit project.
King
Alyssa Brewer
564-669-4922
alyssa.brewer@ecy.wa.gov
Chelan, Clallam, Douglas, Grays Harbor, 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, Kitsap, Klickitat, Thurston, Walla Walla
Jasper Sogn
360-972-6524
jasper.sogn@ecy.wa.gov
Clark, Cowlitz
Joyce Smith
360-628-2138
joyce.smith@ecy.wa.gov
Ferry, Grant, Lewis, Lincoln, Mason, Okanogan, Pend Oreille, Snohomish, Stevens, Wahkiakum, Yakima
Collin Smith
564-669-9319
collin.smith@ecy.wa.gov
Pierce, Skagit, Whatcom
Melinda Wilson
360-870-8290
melinda.wilson@ecy.wa.gov
Permit Writer
Shannon McClellan
ISGP Permit Writer
360-280-8370
Shannon.McClellan@ecy.wa.gov
CNE and Enforcement Coordinator
Clay Keown
General Permit Compliance Specialist
360-480-3353
clay.keown@ecy.wa.gov