About Us

The Seattle Water Supply System Operating Board is a consortium of 17 municipalities, water districts, and the City of Seattle, who partner together to meet State and Federal regulations and bring high quality drinking water to its customers. Municipalities and water districts are known as wholesale customers.

These seventeen wholesale customers have signed contracts with the City of Seattle until 2061. Today, the participants of the Seattle Water Supply Operating Board supply water to more than 1.4 million customers in the greater Seattle metropolitan region of King County, including Cascade Water Alliance, and a small portion of Snohomish County.

The Operating Board consists of seven voting members. Three members are selected from three separate categories of utility representatives (small, medium and large). Seattle has three members, and the 7th member serves as an independent member. Each elected Operating Board member serves for four years over certain policy and operational matters that affect the Seattle Water Supply System.

Operating Board members also participate in the Saving Water Partnership. The 2013-2018 water use efficiency goal of this partnership was as follows: "Reduce per capita water use from current levels so that the total average annual retail water use of the members of the Saving Water Partnership is less than 105 mgd (million gallons per day) from 2013 through 2018 despite forecasted population growth."