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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


7. Morrison Bridge - River Mile 12.7

Samples from this location tested monthly

Sample Collection Date Temperature
degrees Fahrenheit
E. Coli Count
organisms per 100ml
10/3/17 61.7 23
9/6/17 70.0 4
8/2/17 74.8 5
7/12/17 71.6 1
6/15/17 57.7 8
An E. coli count less than 406 is below the health standard set by the Oregon Department of Environmental Quality
↓ below state health standard - ↑ above state health standard