Municipal stormwater permit reissuance

We reissued the Municipal Phase I and Phase II Stormwater Permits on July 1, 2024. The permits expire on July 31, 2029.

2024 permit reissuance 

The Phase I and Phase II Municipal Stormwater Permits have been reissued. A Response to Comments (RTC) addresses comments submitted during the public comment period.The RTC is an appendix to the fact sheet and is with the 2024 Permit documents. Find the current permit documents on each of the permit pages:

Permit reissuance process 

  • Spring 2022 — Listening sessions: We shared our early thinking on proposed changes and gathered additional input.
  • Fall 2022 / Early 2023 — Preliminary drafts of permit sections: We provided preliminary drafts of specific permit sections for informal comment.
  • Aug. - Nov. 2023 — Formal draft permits: We held a formal public comment period, to include workshops and hearings on the draft permits.
  • Nov. 2023 - June 2024 — Considered comments: We considered the comments received, prepared written responses to the comments, and developed revisions to the final versions of the permits.
  • July 1, 2024 — Reissued Phase I and Phase II Municipal Stormwater Permits

Formal permit drafts - comment period

We invited comments on the formal draft Phase I, Western WA and Eastern WA Phase II Municipal Stormwater General Permits from Aug. 16, 2023, to Nov. 10, 2023. View the formal comments

Formal draft reissuance documents

Reissuance process details

Stakeholder-run collaboration — ad-hoc groups

Some Phase I and Phase II permittees are engaging in a collaborative process to discuss and recommend permit changes. Permittees are engaging with one another, as well as environmental stakeholders and other interested parties. This is not an agency-led effort so please contact the Stormwater Center below for more information.

Contact for ad-hoc groups:

More information regarding the ad-hoc groups is on the Washington Stormwater Center website.