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Most King County offices will be closed on Monday, for Presidents Day.  
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4405 Larson Ave.
Carnation, WA 98014
Administration (main control at South Treatment Plant, Renton): 206-263-1810

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Maps of Carnation Treatment Plant and Wetlands Discharge (Chinook Bend Natural Area)Driving directions and map are also available as a PDF file (409KB)

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Carnation Treatment Plant

Chinook Bend Natural Area

City of Carnation