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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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Willamette River Recreation Index

The Big FloatPlanning Some River Recreation?

In November 2011, Environmental Services completed a 20-year program to control combined sewer overflows (CSOs) and today the Willamette River is cleaner than it's been in decades.

Environmental Services collects water samples monthly at three locations on the Willamette River to track long-term water quality trends.

From May to October, bureau staff also collect weekly samples at five river recreational areas to track E. coli bacteria and temperature at public access points.

Get the latest bacteria and temperature test results.

Test Results

Results from eight sampling locations

Willamette River Sampling

Monitoring river health in Portland

E. Coli Information

Sampling and analysis

Questions and Answers

More information about Willamette River water quality in Portland

Morrison Bridge Monitoring Station

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