Water Supply Conditions
The current supply conditions for Seattle's regional water system.
February 2, 2026
Last week, the 7-day precipitation total for the period 1/26/2026 through 2/1/2026 was 4.03 inches in the Cedar River watershed and 2.87 inches in the South Fork (S.F.) Tolt River watershed.
Chester Morse Lake at the Overflow Dike was at an elevation of 1554.7 feet, about 0.7 feet higher than last week and about 2.1 feet higher than 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 1757.3 feet, about 1.2 feet higher than last week and about 1.7 feet higher than 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 S.F. Tolt Rivers.
Water consumption for the previous seven days averaged approximately 106 million gallons per day (mgd). That is less than the 107 mgd consumed during the same period last year, and more 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. As always, we continue to ask customers to use water wisely. For information about ways to save water, visit www.savingwater.org..