Aquatic Plant & Algae Management General Permit

We issue the Aquatic Plant and Algae Management (APAM) General Permit to allow the in-water and shoreline (roadsides, dikes/levees, and ditch banks) management of noxious weeds, native nuisance plants, and algae.

This is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit that allows the use of a specific list of aquatic-labeled herbicides, algaecides, biological water clarifiers, adjuvants, marker dyes, shading products, and phosphorus inactivation products into the freshwaters of Washington.

Para obtener más información, comuníquese con James Hovis al 564-999-3244.

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Permit reissuance

We are pleased to announce that the draft Aquatic Plant and Algae Management general permit is available for public comment. We invite comments on the draft permit documents beginning Oct. 21, 2020 until 11:59 p.m. on Dec. 7, 2020. We will publish a Response to Comments as an appendix to the fact sheet to address comments submitted during the public comment period.

How to provide comments

We will accept comments from Oct. 21, 2020 until Dec. 7, 2020, 11:59 p.m.

You may submit comments:

  • Online: Submit your comments through our online comments form (preferred method)
  • By mail:
    Danielle Edelman
    Washington State Department of Ecology
    PO Box 47696
    Olympia, WA  98504-7696
  • In person virtually: You may provide verbal comments during any of our public hearings

Workshops and hearings

During the workshop, we will explain the proposed changes to the permit and answer questions. The hearing will begin immediately following the public workshop and will end when public testimony is complete. During the hearing, you may give oral testimony and written comments on the proposed changes. Written comments will receive the same consideration as oral testimony.

We will host a workshop immediately followed by a public hearing via webinar on the following dates:

Wednesday, Dec. 2, 2020 10 a.m.
Morning APAM Workshop and Hearing Webinar*
Join the webinar

Thursday, Dec. 3, 2020 5:30 p.m.
Evening APAM Workshop and Hearing Webinar*
Join the webinar 

*The workshops and hearings offered via webinar allow individuals to view the presentation and provide testimony via computer, phone, or other mobile device. Ecology will not offer in-person hearings because of safety concerns relating to COVID-19.


Oct. 21, 2020 to Dec. 7, 2020, 11:59 pm: Formal public process (public comment and formal hearing) on the draft permit
February 2021: Decision on reissuance
March 2021: Current permit expires

Current Permit Documents

Additional documents