Aquatic Mosquito Control General Permit
The draft Aquatic Mosquito Control General Permit is currently available for public comment. Comments will be accepted until Dec. 29, 2023, 11:59 p.m.
We issue this permit to allow the discharge of insecticides into state waters to control mosquitoes. It is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit.
The current permit went into effect July 5, 2019, and expires July 4, 2024.
Español: Para obtener más información, comuníquese con Shawn Ultican al 360-870-3492.
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We are pleased to announce that the draft Aquatic Mosquito Control General Permit is available for public comment. We invite comments on the draft permit documents beginning Nov. 15, 2023 until 11:59 p.m., Dec. 29, 2023. After the close of the comment period, we will publish a Response to Comments as an appendix to the fact sheet to address comments submitted during the public comment period.
Draft permit documents
- Draft Aquatic Mosquito Control General Permit
- Fact Sheet
- Draft Permit Application (Notice of Intent)
- Draft Signage Template (for public notifications)
- Small Business Economic Impact Analysis
- State Register Notice
- SEPA Checklist
- SEPA Determination of Non-Significance
How to provide comments
We will accept comments from Nov. 15, 2023, until 11:59 p.m., Dec. 29, 2023.
You may submit comments on the draft permit through the following methods:
Online: Submit your comments through our online comment form. (preferred method)
By mail: Shawn Ultican
Washington State Department of Ecology
PO Box 47696
Olympia, WA 98504-7696
In person: Comments are accepted during any of our public hearings
To comment on the SEPA Determination of Non-Significance (DNS), visit the Statewide SEPA Register and follow commenting instructions.
Workshops and Hearings
We will host two online workshops and hearings during the public comment period. During the workshops, we will explain the proposed changes to the permit and answer questions. The hearings will begin after the public workshops and will end when public testimony is complete. During the hearings, you may give oral testimony and written comments on the proposed changes. Written comments will receive the same consideration as oral testimony.
- Current Permit (effective July 5, 2019)
- Fact Sheet: Our detailed explanation of the permit
- Appendix B: Response to public comments on the 2019 permit
- Interactive map (WDFW): Areas with restricted larvicide and adulticide use
- Small Business Economic Impact Statement
- Check WDFW's Areas of Restricted Larvicide and Adulticide Use map, select the “Mosquito Control” tab above the map.
- Consult our guidance on Best Management Practices for Mosquito Control.