Water Quality photo identifier

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.

Current Permit

Blue Lake plants

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

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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Freshwater Monitoring Data

Product to Active Ingredient Conversion Table - End of year reporting must be in pounds of active ingredient.

Aquatic Pesticide Permit ListServ