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Chapter 173-201A WAC

Water Quality Standards for Surface Waters of the State of Washington

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Last update: 11/27/24

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WAC Sections

PART I - INTRODUCTION
HTMLPDF173-201A-010Purpose.
HTMLPDF173-201A-020Definitions.
PART II - DESIGNATED USES AND CRITERIA
HTMLPDF173-201A-200Fresh water designated uses and criteria.
HTMLPDF173-201A-210Marine water designated uses and criteria.
HTMLPDF173-201A-230Establishing lake nutrient criteria.
HTMLPDF173-201A-240Toxic substances.
HTMLPDF173-201A-250Radioactive substances.
HTMLPDF173-201A-260Natural conditions and other water quality criteria and applications.
PART III - ANTIDEGRADATION
HTMLPDF173-201A-300Description.
HTMLPDF173-201A-310Tier I—Protection and maintenance of existing and designated uses.
HTMLPDF173-201A-320Tier II—Protection of waters of higher quality than the standards.
HTMLPDF173-201A-330Tier III—Protection of outstanding resource waters.
HTMLPDF173-201A-332Table 332—Outstanding resource water designations by water resource inventory area (WRIA).
PART IV - TOOLS FOR APPLICATION OF CRITERIA AND USES
HTMLPDF173-201A-400Mixing zones.
HTMLPDF173-201A-410Short-term modifications.
HTMLPDF173-201A-420Variance.
HTMLPDF173-201A-430Site-specific criteria.
HTMLPDF173-201A-440Use attainability analysis.
HTMLPDF173-201A-450Water quality offsets.
HTMLPDF173-201A-460Intake credits.
HTMLPDF173-201A-470Performance-based approach.
PART V - IMPLEMENTATION OF STANDARDS
HTMLPDF173-201A-500Achievement considerations.
HTMLPDF173-201A-510Means of implementation.
HTMLPDF173-201A-520Monitoring and compliance.
HTMLPDF173-201A-530Enforcement.
PART VI - USE DESIGNATIONS FOR WATERS OF THE STATE
HTMLPDF173-201A-600Use designations—Fresh waters.
HTMLPDF173-201A-602Table 602—Use designations for fresh waters by water resource inventory area (WRIA).
HTMLPDF173-201A-610Use designations—Marine waters.
HTMLPDF173-201A-612Table 612—Use designations for marine waters.