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Meetings & Hearings

Updates to Policy 1-11 webinar

Revision to Water Quality Program Policy 1-11

Dec. 6, 2022, 10 a.m., Online webinar

Join our informational webinar to learn about the revisions to Policy 1-11.

We are hosting a webinar to explain the draft revisions and answer questions. This is not a formal public hearing.

Tuesday, December 6

10:00 a.m. – 11:30 a.m. 
Register for webinar


  • Presentation 
  • Questions

Use the comment input form to make a comment. The public comment period is open Nov. 7, 2022 – Jan. 6, 2023. 


The Water Quality Assessment (Assessment) is the process that Ecology takes to collect data and assess the quality of surface water of the state. The Assessment fulfills Washington State’s obligation under the federal Clean Water Act to identify polluted waters (known as the 303(d) list) as well as report on the status of water quality in the state (the 305(b) list).  

Water Quality Policy 1-11 is the guiding policy that we use to assess water quality data for the Assessment. This policy explains how to submit data, the data quality necessary for inclusion in the Assessment, and how water body segments are assessed to meet surface water quality standards. The policy is comprised of two chapters.

Chapter 1: Washington’s Water Quality Assessment Listing Methodology
Chapter 2: Ensuring Credible Data for Water Quality Management

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Dec. 6, 2022, 10 a.m.
Join online
Join by phone:
    (253) 215-8782
Meeting ID:
    890 6316 9437
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Justin Donahue
Water Quality Assessment Scientist
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Comment period

Comment on the 2022 draft revisions — Updates to Water Quality Program Policy 1-11
Closes: Jan. 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.