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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

More Contact Info

More Information on River Sampling

Find out more about Willamette River watershed

Learn more about watershed health conditions of the mainstem area of the Willamette River through Portland

E. coli Sampling: Learn More

The methodology behind Willamette River water quality sampling

History: Willamette River Sampling

Monitoring river health in Portland

Test Results

Results from eight sampling locations

U.S.G.S. Monitoring Station: Morrison Bridge

View data from the U.S. Geological Survey's Willamette River monitoring station at the Morrison Bridge