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Comment Period

Chelan Use Attainability Analysis (UAA)

WAC 173-201A, Water Quality Standards for Surface Waters of the State of Washington

March 24, 2021 - May 21, 2021, 11:59 p.m.

We invite comments on the draft rule language for Water Quality Standards for Surface Waters (WAC 173-201A).

Comments due: May 21, 2021

Submit by: Online, mail, or at one of the public hearings.

We are considering a change to the aquatic life designated use of salmonid spawning, rearing, and migration on the Chelan River using a use attainability analysis (UAA). A UAA is an approved water quality tool in Washington’s surface water quality standards (WAC 173-201A-440) and is used for removing or revising a designated use for a water body only if that use is not existing or attainable. 

Documents for review

We write rules to implement and enforce state and federal environmental laws and rules.  Ecology follows a 3-phase process for rulemaking:

  1. Announcement and development
  2. Proposal
  3. Adoption

For each phase of the process, we update the rulemaking web page and notify interested parties. We also file notice in the Washington State Register. To learn more about Ecology’s rulemaking process, read the Frequently Asked Questions.


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Comment by mail

Marla Koberstein
Department of Ecology
Water Quality Program
PO Box 47600
Olympia, WA 98504-7600
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Marla Koberstein
Rulemaking Lead

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