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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

More Contact Info


5. Portland Boathouse Dock - River Mile 12.9

Samples from this location tested weekly from May to October

Sample Collection Date Temperature
degrees Fahrenheit
E. Coli Count
organisms per 100ml
9/28/22 64.0 20
9/21/22 64.9 14
9/14/22 66.4 26
9/7/22 71.4 3
8/31/22 73.2 8
8/24/22 73.9 9
8/17/22 73.0 5
8/10/22 74.8 24
8/3/22 77.4 5
7/27/22 74.7 10
7/20/22 71.6 6
7/13/22 70.0 10
7/6/22 66.0 4
6/29/22 66.9 4
6/22/22 59.0 21
6/15/22 53.8 160
6/8/22 58.5 28
An E. coli count less than 406 is below the health standard set by the Oregon Department of Environmental Quality. A value of 'ND' indicates a non-detection.
↓ below state health standard - ↑ above state health standard