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8/7/2019 Water Quality Standards Details <br />� } DEPAATME <br />ECOL Washington State Water Quality Atlas <br />State a( WA <br />Water Quality Standards for Surface Waters of the State of Washington <br />Disclaimer: The Department of Ecology continues to improve the mapped depiction of the Surface <br />Water Quality Standards. However, the map may contain errors and the information displayed <br />does not replace the official rules available in Chapter 173-201A of the Washington Administrative <br />Code. <br />USE DESIGNATIONS <br />WAC: 173-201A-600 (1)(a)(ii) <br />Description: All lakes and all feeder streams to lakes (reservoirs <br />with a mean detention time greater than fifteen <br />days are to be treated as a lake for use <br />designation); <br />Aquatic life use: Core summer salmonid habitat <br />Recreation use: Extraordinary primary contact recreation <br />Water supply uses: Domestic, Industrial, Agricultural, Stock, Wildlife <br />Habitat <br />Miscellaneous uses: Harvesting, Commerce and Navigation, Boating, <br />Aesthetics <br />CRITERION <br />Temperature: 160C (60.8°F) <br />Supplemental spawning: None <br />Dissolved Oxygen (DO): 9.5 mg/L <br />pH: pH shall be within the range of 6.5 to 8.5, with a <br />human -caused variation within the above range of <br />less than 0.2 units <br />Turbidity: 5 NTU over background when the background is 50 <br />NTU or less; or <br />A 10 percent increase in turbidity when the <br />background turbidity is more than 50 NTU <br />hUps://fortress.wa.gov/ecy/waterqualityatlas/wq_standards. html?id= l 7 1 /2 <br />