Water Supply Conditions

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

December 4, 2023

Last week, the 7-day precipitation totals for the period 11/27/2023 through 12/3/2023 were 2.7 inches and 2.8 inches in our Cedar River and South Fork Tolt (SF Tolt) River watersheds, respectively.

Chester Morse Lake at the Overflow Dike was at elevation 1550.1 feet, about 0.3 feet lower than last week, and about 1.0 foot below 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 1729.1 feet, about 1.0 foot higher than last week, and about 22.2 feet below 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 approximately equal to the 104 mgd consumed during the same period last year and about 1 mgd more than the 103 mgd used during the same period over the years 2010-2019.

After an unusually dry summer and an extended seasonal outlook for a dry fall, Seattle is concerned about having sufficient water for people and fish through the end of the year. To help stretch our water supply until the return of sustained fall rains, Seattle Public Utilities activated the Voluntary Stage of our Water Shortage Contingency Plan. While we always ask customers to use water wisely, we are asking customers to voluntarily use less water than they normally would. For practical tips and information on how to save water this year, please 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

Newsletter Updates


Sign up for the latest updates from Public Utilities

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.