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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


8. Cathedral Park Boat Launch - River Mile 5.6

Samples from this location tested weekly from May to October

Sample Collection Date Temperature
degrees Fahrenheit
E. Coli Count
organisms per 100ml
9/27/23 65.5 28
9/20/23 68.2 10
9/13/23 68.2 5
9/6/23 68.9 10
8/30/23 73.0 14
8/23/23 75.4 2
8/16/23 77.9 10
8/9/23 75.2 10
8/2/23 75.7 13
7/26/23 75.9 10
7/19/23 75.2 3
7/12/23 74.3 3
7/5/23 73.4 25
6/28/23 68.9 9
6/21/23 67.3 2
6/14/23 67.6 2
6/7/23 65.5 5
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