Seattle Public Utilities Mami Hara, General Manager/CEO


Customer Service - phone number 206-684-3000


Information includes customer list information and the annual wholesale customer survey. For assistance, contact Terri Gregg, Wholesale Contracts Manager at (206) 684-7975. See Wholesale Water Customers.


Commercial, wholesale, Third Tier rates, Third Tier appeal process, Fire Service rates, and frequently asked questions. See Rates.


Constructing a new home or building or renovating an existing facility? Information for property owners who want new connections to Seattle’s water supply system or to upgrade existing water services. Learn about large and small water service, standard charges, street restoration, how to check for water availability, getting help installing water mains and installation requirements. Learn more about New Water Service.

  • 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.