Appendix 1. Minimum Technical Requirements or New Development and Redevelopment

Appendix 2. Total Maximum Daily Load Requirements

Appendix 3. Annual Report Questions for Cities, Towns and Counties

Appendix 4. Annual Report Questions for Secondary Permittees

Appendix 5. Notice of Intent for Coverage

Appendix 6. Street Waste Disposal

Appendix 7. Determining Construction Site Sediment Damage Potential

Appendix 8. Annual Report Questions for New Permittees

Appendix 9. Stormwater Discharge Monitoring

Western Washington Phase II Municipal Stormwater Permit November 11, 2011 Fact sheet

Modified Zostera japonica Management General Permit Response to comments.

Current permit, effective 2013-2018, modified in 2014

The Zostera japonica Management on Commercial Clam Beds in Willapa Bay permit is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit. It allows the use of imazamox and marker dyes on commercial clam beds (excluding geoduck), in Willapa Bay only, for control of Zostera japonica eelgrass, a Class C noxious weed.

Current Year Wastewater Treatment Plant Award Recipients

We certify stormwater treatment technologies that have undergone Technology Assessment Protocol.

We have issued a combined state agency general permit.

Presentations, fact sheets, videos, reports, manuals, and other guidance for Low Impact Development

Learn how to submit your permit documents electronically through the WQWebPortal.

We provide online access to register new and existing underground injection control (UIC) wells.

We provide guidance for developing and implementing municipal stormwater management programs.