Water Supply Conditions
The current supply conditions for Seattle's regional water system.
August 26, 2024
Last week, the 7-day precipitation totals for the period 8/19/2024 through 8/25/2024 were 2.1 inches and 2.8 inches in our Cedar River and South Fork (S.F.) Tolt River watersheds, respectively.
Chester Morse Lake at the Overflow Dike was at an elevation of 1553.2 feet, about 1.0 feet lower than last week, and about 0.9 feet above its long-term average (based on the years 1990 to 2019). The S.F. Tolt Reservoir at the S.F. Tolt Dam was at an elevation of 1749.2 feet, about 0.8 feet lower than last week, and about 2.4 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 142 million gallons per day (mgd). That is about 28 mgd less than the 169 mgd consumed during the same period last year, and less than the 167 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 summer.
As always, we continue to ask customers to use water wisely. For information about ways to save water, visit www.savingwater.org.