Water Quality Standards Regulations: Washington

Presented below are water quality standards in effect for Clean Water Act (CWA) purposes for this state.

EPA is posting these standards as a convenience to users and has made a reasonable effort to assure their accuracy. Also, for each document listed under "State Standards in Effect for CWA Purposes", EPA has made a reasonable effort to identify parts of the standards that are disapproved or are otherwise not in effect for CWA purposes.

On this page:

State Standards in Effect for CWA Purposes

  • [See Water Quality Standards for Surface Waters of the State of Washington, Chapter 173-201A WAC ]
    (Effective August 10, 2011)
  • [See Sediment Management Standards, Chapter 173-204 ]

Federally Proposed or Promulgated Standards

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