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
2009-2018) of water quality data.
View Water Quality Index Map
Oregon Water Quality reports and documents
Reference materials
Data downloads
Basin summary tables
- North and Mid-Coast
- Willamette, Sandy, Columbia
- Umpqua, Rogue, South Coast
- Hood, Deschutes, John Day, Umatilla, Grande Ronde
- Powder, Malheur, Owyhee
- Klamath, Closed Basins
Contact
Lesley Merrick, 503-693-5724
Dan Brown, 503-693-5743