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Water Quality Program

Aquatic Plant and Algae Management General Permit

The Aquatic Plant and Algae Management General Permit (permit) is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit. It covers the in-water and shoreline (including roadsides and ditch banks) treatment of native and noxious plants and algae. It also covers nutrient inactivation treatments. The permit allows the discharge of a specific list of aquatic labeled herbicides, algaecides, biological water clarifiers, adjuvants, marker dyes, and nutrient inactivation products into the freshwaters of Washington.

How to apply for the Aquatic Plant and Algae Management General Permit

Washington Fish and Wildlife Timing Table

Discharge Management Plan Template and SEPA Addendum - Use if 5 or more acres of area will be included in your permit application.

Product to Active Ingredient Conversion Table (Excel) - End of year reporting must be in pounds of active ingredient. Use this table to convert the amount of product used into pounds of active ingredient. If a product is not listed, please let us know so we can add it.

Shoreline Posting Sign Templates in Spanish

Freshwater Monitoring Data

Historical Permit Information

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Current and Pending Permit Coverages by County

Transfer Form - Use to transfer coverage to another party.

Notice of Termination Form - Use to cancel your permit coverage.

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Aquatic Pesticide Permit ListServ