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P.O. Box 42560
1111 Washington ST SE
Olympia, WA 98504-2560
Phone: (360) 902-1800

NPDES Permit

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NPDES PERMIT FOR AQUATIC NOXIOUS WEED CONTROL



​The Washington State Department of Agriculture holds the Aquatic Noxious Weed Management National Pollutant Discharge Elimination System (NPDES) General permit issued by Ecology under authority of the federal Clean Water Act.

This permit is for use of herbicides to control some aquatic noxious weeds in Washington State. The permit addresses use of herbicides to control marine weeds (such as Spartina), and freshwater emerged weeds (such as purple loosestrife).

 

Integrated Management

The Aquatic Noxious Weed Control General Permit controls freshwater and marine noxious weeds in Washington. It covers the indirect discharge of herbicides, adjutants, and marker dyes into estuaries, marine areas, wetlands, along lake shorelines, rivers, streams, and other wet areas. Learn more about this permit by visiting Washington State Department of Ecology's Webpage.

Integrated Pest Management is a decision making process using the most appropriate control method, or a combination of those methods, to control a targeted weed species with the least impact to the environment and with the greatest impact to the weed.

Integrated Pest Management Plan for Freshwater Emergent Noxious and Quarantine Listed Weeds. [PDF]

Learn How to Apply

Watch the video below to learn how to apply for NPDES permit coverage with the Aquatic Noxious Weed Control General Permit using SAW. You can also click here to watch the video.

Additional Video Links

Click the links below for additional resources mentioned in the video.

Washington State Secure Access Website (SAW)

Washington State Noxious Weed Control Board webpage on noxious weed lists

Washington State Department of Ecology webpage on finding your Water Resource Inventory Area (WRIA)
 

Shoreline Posting Permit

Shoreline Post Sign templates fror the Aquatic Noxious Weed Control NPDES Permit are located in the buttons below. Versions are downloadable in English and Spanish.

 

 

Environmental Impact Statements