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

1120 SW 5th Ave, Suite 613, 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
5/4/22 52.0 49
4/5/22 51.4 29
3/3/22 47.7 180
2/2/22 41.7 12
1/6/22 44.4 230
12/1/21 51.1 26
12/1/21 51.1 26
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