Phone: 503-823-7740
Fax: 503-823-6995
1120 SW 5th Ave, Suite 613, Portland, OR 97204
Phone: 503-823-7740
Fax: 503-823-6995
1120 SW 5th Ave, Suite 613, Portland, OR 97204
Since 1993, Environmental Services has been working closely with the Oregon Department of Environmental Quality (DEQ) to study the slough's sediment and to eliminate pollutants that reach the Columbia Slough. Studies show widespread, low-level contamination throughout the slough's sediments with a few isolated areas of higher contamination.
The city's cleanup approach includes:
Learn more about our efforts to clean up slough sediment in the most recent annual report or at DEQ's Columbia Slough Sediment Project.
Columbia Slough Sediment Program annual report
Columbia Slough Sediment Program annual report