Water Supply Conditions

Below are current supply conditions for Seattle's regional water system.

February 19, 2024

Last week, the 7-day precipitation totals for the period 2/12/2024 through 2/18/2024 were 0.3 inches and 0.1 inches in our Cedar River and South Fork Tolt (SF Tolt) River watersheds, respectively.

Chester Morse Lake at the Overflow Dike was at elevation 1553.5 feet, about the same as last week, and about 0.7 feet above its long-term average (based on the years 1990 to 2019).  The South Fork Tolt Reservoir at the South Fork Tolt Dam was at elevation 1757.3 feet, about 0.4 feet higher than as last week, and about 1.3 feet above its long-term average.  Water releases from reservoir storage are actively being managed for water supply, fish habitat and flood management objectives for both the Cedar and South Fork Tolt Rivers.

Water consumption for the previous seven days averaged approximately 104 million gallons per day (mgd). That is 2 mgd more than the 102 mgd consumed during the same period last year, and greater than the 102 mgd used during the same period over the years 2010-2019.

Based on current conditions and forecasts, Seattle anticipates the regional water system will have sufficient water supply for people and fish this winter.

As always, we continue to ask customers to use water wisely.  For information about ways to save water, visit www.savingwater.org.

Related resources

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.