Industrial Stormwater General Permit

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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 regulations that reduce pollution. We require most industrial sites in Washington to monitor, measure, and reduce stormwater pollution leaving their site.

The current permit went into effect on Jan. 1, 2020, and expires Dec. 31, 2024.

Join our email list to receive updates about this permit.

Permit reissuance

We invited comments on the draft Industrial Stormwater General Permit permit documents from May 15 to July 15, 2024. We will publish a Response to Comments as an appendix to the fact sheet to address comments submitted during the public comment period.

Transportation facility

Draft permit documents

Comment Period

We accepted comments online, by mail, and during our public hearings from May 15 to July 15, 2024. You can view comments we recieved on our online comment form.

Workshops and hearings 

During the workshops on June 20th and 24th, we explained the proposed changes to the permit and answered questions. The hearings began immediately following the public workshops.

View the workshop presentation. (PDF)

Timeline

Spring 2024: Formal public comment period on the draft permit
Winter 2024: Decision on permit issuance

Current applications and forms and historic permit documents