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. In this map, scores are color-coded to indicate water quality status, and evaluated for improving or declining trends at each site. The status and trend analyses incorporate 10 years (currently water years 2011-2020) of water quality data.
View Water Quality Index Map
2020 Data Summary
2019 Data Summary
2018 Data Summary
2017 Data Summary
North and Mid-Coast
Willamette, Sandy, Columbia
Umpqua, Rogue, South Coast
Hood, Deschutes, John Day, Umatilla, Grande Ronde
Powder, Malheur, Owyhee
Klamath, Closed Basins
Dan Brown, Water Quality Monitoring Program503-693-5743