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Western Washington MS4 Phase II 2019-2024 Permit Compliance tables were created by Phase II permittees.

They are being shared by those who created them for other permittees use as a template for your programs.

Western Washington Phase II Municipal Stormwater Permit Overview – 2024 to 2029

The timeline below provides an overview of major program deadlines for implementing permit requirements of the S5 Stormwater Management Program (SWMP) and S8 Monitoring and Assessment for Continuing City, Town, and County Permittees (By Date means “no later than…”). This is guidance only. The table paraphrases requirements and does not include all ongoing program elements. Please see the permit for additional details and related requirements.

The City of Lake Stevens created and shared this S5C7 and Appendix 12 document as a template. It can be edited to meet your jurisdiction’s needs.

Training Resources

These plans line up with the Washington Phase II permit requirements for training and are designed to give jurisdictions a direction for how to organize their training obligations. They are meant to be updated annually with the SWMP.

For each of the permits, there is a summary of training obligations and resources to meet those obligations.  This tool lists the annual report question that will need to be answered and provide some resources to obtain the necessary training.

Synthesis of Street Sweeping Research & Practices: Guiding Program Development & Implementation

This project will assist in the development of a guidance manual that will provide information and tools Permittees can use to assist with developing and/or improving their street sweeping program. This effort is timed to support Permittees with meeting the anticipated 2024-2029 Municipal Separate Storm Sewer (MS4) Permit requirements, enabling these Permittees to implement a street sweeping program by July 1, 2027.

Learn More

This web page serves as a resource page for participants in the 2024 Western Washington Ad Hoc Process. Moving forward, Western Washington permittees and stakeholders can visit this site to learn about this effort, track dates and times, and get updates – including from the various Topic Group’s efforts.

Learn More

2024-2029 Phase 2 Compliance Template

Templates 2019-2024:

Ecology Provided Timetable:

Each jurisdiction may need jurisdiction-specific adjustments/customizations (e.g., monitoring option selected, monitoring for SW WA permittees, secondary permittees, details on TMLD requirements, etc.)

The intent for sharing these templates is to aid in:

  • Communicating stormwater permit obligations among department management, staff, decision-makers, and programs,
  • Identify resource and staffing needs,
  • Assigning roles and responsibilities among departments and staff,
  • Developing work programs and budgets,
  • Tracking permit compliance, and
  • Generating annual reporting assignments