Welcome to Sammamish Plateau Water and Sewer District

The Sammamish Plateau Water and Sewer District provides water services to over 17,000 customers and sewer services to nearly 11,000 customers, and serves a total population base of over 54,000 residents. The 29 square mile service area includes the northern portion of the City of Issaquah, over half of the City of Sammamish and areas of unincorporated King County, including Klahanie. The District was formed by the vote of the people over 60 years ago, and continues to manage and protect its groundwater resources on behalf of the customers it serves.


Media Release: Local water contamination found, but Sammamish Plateau water is safe

Your Water is Safe: Questions and Answers about PFOA


Surplus Property for sale:

Tamarack Division 1 Lot 14 at 246 211th Pl NE

Old Shop Site at 215th Lane SE