Reducing Combined Sewer Overflows

Approximately one third of our City has a Combined Sewer System where stormwater and wastewater are combined. During heavy rains, this system is more likely to overflow into our local waters; this is called a combined sewer overflow or CSO. Use our map to find current or recent overflows.

Since 2008, we have invested almost $1 billion to reduce CSOs. We are reducing pollution in our waters. Learn more about our commitment to CSO reduction:

Public Utilities

Andrew Lee, General Manager and CEO
Address: 700 5th Avenue, Suite 4900, Seattle, WA, 98104
Mailing Address: PO Box 34018, Seattle, WA, 98124-5177
Phone: (206) 684-3000
SPUCustomerService@seattle.gov

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Seattle Public Utilities (SPU) is comprised of three major direct-service providing utilities: the Water Utility, the Drainage and Wastewater Utility, and the Solid Waste Utility.