Municipal stormwater permit reissuance

We reissued the current permits on July 1, 2019. The Phase I and Phase II permits expire on July 31, 2024.

We are beginning to work on the 2024 permit reissuance to identify issues and necessary improvements for the permits.

2024 permit reissuance 

We're working on the 2024 permit reissuance. We welcome early input to help develop the proposed draft permits.

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.
  • Summer 2023 — Formal draft permits: We will hold a formal public comment period, to include a workshop and hearing, on the draft permits.
  • July 2024 — Make permit decision.

Preliminary permit drafts for informal comment — Winter 2023

As part of our Phase I and Western Washington Phase II Municipal Stormwater Permit reissuance process, we asked for feedback on preliminary draft language proposed for two specific permit sections:

  1. Phase I Permit: Preliminary Draft - Structural Stormwater Controls Program (S5.C.7) (version updated to correct typos on page 12 and in Table 3).
  2. Western WA Phase II Permit: Preliminary Draft — New section — Stormwater Controls for Priority Developed Areas.

We accepted comments Feb. 23 – March 23, 2023. We will use the informal comments we received to develop the proposed language for the formal draft permits, anticipated for public comment in Summer 2023.

View comments submitted Winter 2023.

We hosted a virtual workshop on March 6, 2023. A copy of the workshop presentation is available online.

Preliminary permit drafts for informal comment — Fall 2022

From Oct. 17 – Dec. 2, 2022, we held an informal comment period on several preliminary draft proposals for the permits and stormwater management manuals, both eastern and western (SWMM).

We prepared several preliminary draft proposals for a 45-day informal comment period. Some of the preliminary drafts are excerpts of permit sections and not a complete representation of all the permit requirements.  

See comments submitted Fall 2022.

We held a virtual workshop on the preliminary draft sections and Stormwater Management Manual updates on Nov. 7, 2022.

Preliminary Draft Permit Topics

  1. Standard outfall reporting — mapping
    1. Template 1: GIS database (zip file will open)
    2. Template 2: GIS Shapefile (zip file will open)
    3. Template 3: Excel 
  2. Tree retention — stormwater planning or monitoring & assessment
  3. PCBs — Education and outreach, IDDE, O&M
  4. Sweeping — O&M
  5. EWA Effectiveness Studies — Monitoring & assessment
  6. Controlling runoff – Appendix 1
    1. Western WA Preliminary Draft App. 1
    2. Eastern WA Preliminary Draft Permit Construction/Post-Construction and App 1

Visit the Stormwater manual page for preliminary drafts available for comment.

Listening sessions

We hosted listening sessions on June 6 and June 13, 2022, to prepare for the 2024 reissuance of the municipal stormwater permits (Phase I, Western WA and Eastern WA Phase II) and concurrent updates to the stormwater management manuals (SWMM), both eastern and western.

The listening sessions provided an opportunity to:

  • Present our preliminary plans for the scope of changes for the 2024 permits and SWMMs.
  • Share early input we received from our stakeholders.
  • Hear further input on the proposed scope of changes.

Listening session presentations

Early input

We accepted early input until Feb. 25, 2022. 

Early input ideas help inform the scope of significant issues to be addressed in our reissuance of the 2024 permits. 

View early input comments

Collaboration opportunities

Structural Stormwater Control Policy Advisory Committee

Policy Advisory Committee Meetings were held May – December 2022, details are posted on our SSC PAC project page.

The Structural Stormwater Control (SSC) Policy Advisory Committee (PAC) — focused on recommendations regarding the Phase I SSC program requirements, and also provided recommendations on a retrofit approach for 2024 WWA Phase II Permit. 

PAC Membership:

  1. Rod Swanson, Clark County
  2. Blair Scott, King County
  3. Maureen Meehan, Pierce County
  4. Bill Leif, Snohomish County
  5. Merita Trohimovich, City of Tacoma
  6. Ingrid Wertz, City of Seattle
  7. Sheena Pietzold, WDOT
  8. Jane Dewel, Port of Seattle
  9. Jenny Gaus, City of Kirkland
  10. Larry Schaffner, Thurston County
  11. Jason Quigley, Skagit County
  12. Ken Gill, City of Shelton
  13. Peter Holte, City of Redmond
  14. Alyssa Barton, Puget Soundkeeper
  15. Aaron Clark, Stewardship Partners

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.