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Surface Water Quality Standards
Overview: Learn more about the Surface Water Quality Standards and how they interact with the waters of Washington State.
Designated uses: Learn more about how designated uses have sometimes been called “beneficial uses” and include public water supply, protection for fish, shellfish, and wildlife, as well as recreational, agricultural, industrial, navigational and aesthetic purposes.
Surface water criteria: Learn more about fresh and marine water quality criteria developed to provide protection for designated uses.
Antidegradation: Learn more about how the surface water quality standards help prevent unnecessary lowering of water quality, and provide a framework to identify those waters that are designated as an “outstanding resource” by the state.
Read what people are saying about Ecology’s intent to revise the surface water quality standards.
Know your water quality standards:
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