Puget Sound Beach CSO Control Projects

Now posted: information on alternative means for CSO control in each of the project areas: North Beach, South Magnolia, Murray and Barton. Learn more and provide input at upcoming public meetings or by using the feedback form.

CSO control needs in the project basins

As part of its CSO Control Program, King County has identified CSO control approaches for the four project basins along Puget Sound in Seattle. These locations are top priority because people are most likely to come in contact with water during recreational activities such as swimming.

State Department of Ecology (DOE) regulations require CSO facilities to have no more than one CSO event per year on a long term average. These CSO facilities do not meet this requirement at this time. Figures below are based on a 2008 report to DOE.

• North Beach - North Beach discharged on average 10 times each year, a total of 2.2 million gallons per year.
• South Magnolia - South Magnolia discharged on average 19 times each year, a total of 31 million gallons per year.
• Murray - Murray discharged on average 5 times per year a total of 5 million gallons off Lowman Beach.
• Barton - Barton discharged on average 4 times per year a total of 4 million gallons into Puget Sound off Fauntleroy.