An official website of the State of Oregon
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The Oregon Water Quality Index analyzes a defined set of water quality variables and produces a score describing general water quality for a particular monitoring site in the ambient monitoring network. Scores correspond to a water quality status and are evaluated for improving or declining trends at each site. The status and trend analyses incorporate 10 years (currently water years 2012-2021) of water quality data.
View the Water Quality Index Map
Raw Data and Historical Status and Trends
Dan BrownWater Quality Monitoring Program503-693-5743
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