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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?

Today the Willamette River through Portland is cleaner than it's been in decades, thanks in large part to ratepayers’ investment in the Big Pipe project that dramatically reduced combined sewer overflows.  

With rare exceptions, our stretch of the river is clean enough for swimming, boating and other recreation.

How clean? Find out for yourself. Get the latest bacteria and temperature test results.

How often do we test:

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

Summer weekly testing: In addition, Environmental Services collects weekly samples from late May to October to measure for E. coli bacteria and temperature at five popular public entry points. Water samples are collected on Wednesdays and results posted by Friday morning – just in time for the weekend.


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