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  • 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.

Rates for drinking water, information includes: the base service charge per month per meter, and the general service commodity charge per CCF.

All Water Rates


  • What do your sewer and drainage rates pay for?
  • Protecting local waterways from sewage overflows…
  • Preventing flooding, landslides, and sewer backups…
  • Maintaining, repairing, and replacing pipes and pumps…
  • Protecting local waterways from pollution…
  • Protecting local waterways from stormwater runoff…
  • Relocating sewer and drainage pipelines for major projects.

All properties 10,000 square feet and larger are assigned to rate categories based on how much impervious surface is contained on the parcel. Each rate category is assigned a rate which is multiplied by the parcel area (in 1,000s of square feet) to calculate the total charge, or bill. Information includes rate schedule, rate increase frequently asked questions, and how to apply for a stormwater utility credit.

Drainage Rates


For non-residential and multifamily residential customers, sewer bills are based on actual water usage at all times of the year.

Sewer Rates


  • What do your solid waste rates pay for?
  • Curbside collection of garbage, food and yard waste, and recycling...
  • Transfer of garbage and yard waste/ food waste at our recycling and disposal stations...
  • Processing of recyclables and yard waste/ food waste...
  • Transport and disposal of garbage at the landfill in Oregon...
  • Monitoring historic landfills...
  • Managing household hazardous waste disposal...
  • Encouraging waste reduction, recycling, composting, and reuse...
  • Keeping neighborhoods clean and free of graffiti.

Rates depend on the type and size of container, pick-up frequency, and whether the material is compacted.

Commercial Garbage Rates


Food and yard waste is not allowed in commercial garbage. Rates depend on the type and size of container, pick-up frequency, and whether the material is compacted. Information includes charges for monthly container rates and compacted rates.

Commercial Compost Rates