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Meetings & Hearings

Evening Workshop and Formal Hearing

Irrigation System Aquatic Weed Control General Permit

Feb. 22, 2023, 5:30 p.m., Online webinar

We invite you to attend an evening workshop and hearing on the Irrigation System Aquatic Weed Control general permit. Please see the related morning event on Feb. 21, 2023, if it works better for your schedule.

During the workshop, we will explain the proposed changes to the permit and answer questions. We will also explain key findings of the draft environmental impact statement (DEIS).

The public hearing will begin after the workshop and will end when public testimony is complete. During the hearing, you may give oral testimony on the proposed changes or the draft EIS. Written comments receive the same consideration as oral testimony.

Meeting information

Join the Webinar
Join by Phone: +1 (253) 205-0468
Meeting ID: 876 2835 0186

Tips for attending the event

  • We recommend you use the Google Chrome browser when signing in.
  • Plan to join us 10 minutes or so before the event begins, around 5:20 p.m.
  • For unstable internet, you can join by phone audio. In the Zoom meeting, click the up arrow by the mute button to select.

This is one of two opportunities to attend a formal public hearing for the Draft ISAWC permit and EIS.


We issue the Irrigation System Aquatic Weed Control permit to irrigation districts, reclamation districts, water companies, and similar entities that discharge wastewater either directly or indirectly to waters of the state.

This permit allows the regulated use of aquatic pesticides, marker dyes, and nutrient inactivation products to control the growth of aquatic plants and algae within irrigation systems, helping them maintain the capacity to convey water.

Event time icon


Feb. 22, 2023, 5:30 p.m.
Join online
Join by phone:
    1 (253) 205-0468
Meeting ID:
    876 2835 0186
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Danielle Edelman
General Permit Writer
(360) 763-2597
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Comment period

Irrigation System Aquatic Weed Control Environmental Impact Statement — Draft EIS
Closes: March 6, 2023, 11:59 p.m.
See details

Irrigation System Aquatic Weed Control General Permit — Draft Permit
Closes: March 6, 2023, 11:59 p.m.
See details

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.