Aquatic Mosquito Control General Permit

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Permit reissuance

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.

Learn more about the permit reissuance.

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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Permit reissuance

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.

Mosquito sitting on a leaf

Draft permit documents

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. 

Hearing opportunities

Current permit documents

Permit coverage information

Mosquito control resources