Skip to Main Content View Text-Only

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
6/6/18 62.8 10
5/10/18 59.9 15
4/12/18 50.2 120
3/15/18 48.4 20
2/1/18 46.4 110
1/18/18 46.4 34
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