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


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
9/19/18 63.7 12
9/12/18 67.8 4
9/5/18 68.7 6
8/29/18 69.6 3
8/22/18 72.9 17
8/15/18 75.0 26
8/8/18 76.1 27
8/1/18 76.1 23
7/24/18 75.7 21
7/18/18 73.9 17
7/11/18 69.6 29
7/3/18 70.3 6
6/27/18 70.7 13
6/20/18 66.0 31
6/13/18 62.6 41
6/6/18 64.4 4
5/30/18 61.7 13
5/23/18 62.4 30
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