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


3. Willamette Park Boat Launch - River Mile 15.7

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 63.1 80
9/20/23 68.2 11
9/13/23 67.3 16
9/6/23 67.8 11
8/30/23 70.2 100
8/23/23 75.2 4
8/16/23 77.0 18
8/9/23 74.8 4
8/2/23 74.7 9
7/26/23 75.9 12
7/19/23 75.0 72
7/12/23 73.8 5
7/5/23 74.1 23
6/28/23 69.8 15
6/21/23 66.2 16
6/14/23 67.1 30
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