Aquatic Mosquito Control General Permit

This permit is for government entities and individuals who plan to use larvicides or adulticides to control mosquitoes. This permit does not apply to homeowner use of insecticides for residential control of mosquitoes.

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.

Para obtener más información, comuníquese con Chelsea Morris al 360-407-6563.

Mosquito control programs are important to public health. They are multifaceted and include surveillance, source reduction, and a variety of methods to control larval and adult mosquitoes. The use of pesticides to manage mosquito populations is controlled by many agencies and regulations. In addition to Ecology’s Aquatic Mosquito Control General Permit, the following are examples of agencies and laws that regulate the use of pesticides to control mosquito populations.

  • Federal Environmental Protection Agency
  • Washington State Department of Agriculture
  • Federal Insecticide, Fungicide, and Rodenticide Act
  • Washington Pesticide Control Act
  • Washington Pesticide Application Act

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The current permit goes into effect July 5, 2019, and expires July 4, 2024.

Current permit and related documents

Permit reissuance - 2019

We reissued the 2015 permit to authorize the use of an additional tool — deltamethrin — to control mosquitoes in Washington. Other revisions include updates to reporting requirements and edits to improve the readability of the permit.

We held a public comment period from March 6, 2019, through April 19, 2019. We held two workshops, both immediately followed by a public hearing, on April 9 and April 10, 2019. We published a Response to Comments as an appendix to the Fact Sheet, to address comments submitted during the public comment period.

You may view comments received on the draft permit.


Additional documents