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The City of Portland, Oregon

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


6. Morrison Bridge - River Mile 12.7

Samples from this location tested monthly

Sample Collection Date Temperature
degrees Fahrenheit
E. Coli Count
organisms per 100ml
7/3/19 68.2 12
6/4/19 64.9 17
5/16/19 61.5 22
4/9/19 48.0 920
3/14/19 44.8 10
2/6/19 44.1 49
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