Chester Morse Lake is part of the 90,000-acre Cedar River Watershed - a protected source of water in the foothills of the Cascade Mountains.
The watersheds that provide our drinking water are protected and monitored for anything that could threaten water quality.
The water supply from the South Fork of the Tolt River is part of the 12,500-acre Tolt River Watershed - including 8,400 acres of protected, City-owned land.
The Tolt Water Treatment Facility uses filtration and ozonation to provide high quality drinking water to about 450,000 people in King County.
The Cedar Water Treatment Facility uses ozonation and ultraviolet light (UV) disinfection to provide high quality drinking water to about 850,000 people in King County.
Water operations staff are at work 24 hours a day to ensure a dependable, safe drinking water supply.
Seattle’s water quality laboratory conducts sampling and testing of the water supply every day of the year.
The Beacon Hill Reservoir is one of eight water reservoirs covered during the last 15 years to protect the water supply – providing the added benefit of new park land.
Water crews maintain 1,800 miles of pipelines, 18,000 fire hydrants, and many other water facilities in Seattle and King County.
About 1.3 million people in King County depend on Seattle to provide their drinking water.
Seattle Public Utilities adjusted drinking water rates in January of 2014 to pay for investments in the water supply system. Seattle Public Utilities has no increase in drinking water rates for 2015. Seattle water still costs less than a penny per gallon even with the rate increase. 2014-2015 rates were approved by the City Council in November 2011.