Water Quality > Ground & Surface Water Quality Standards > Surface Water Quality Standards > Approved Surface Water Quality Standards

Approved Surface Water Quality Standards

On August 1, 2016, Ecology adopted revisions to Water Quality Standards for Surface Waters of the State of Washington, Chapter 173-201A WAC and sent it to the federal Environmental Protection Agency (EPA) for review.

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EPA’s review, and partial approval, of our adopted rule:

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Updates to the surface water quality standards

 

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Last updated September 2017