Sewer / Water / Stormwater

Sewer Service

The City currently provides sanitary sewer service exclusively within its limits, managing approximately 2,900 commercial and residential accounts. The sewer system comprises 38 miles of collection pipes, five lift stations, and a Membrane Bioreactor (MBR) Wastewater Treatment Plant (WWTP). The monthly sewer utility rate covers both the collection and treatment of sanitary sewer flow. "Collection" refers to the network of pipes and lift stations that transport wastewater from the customer to the WWTP. At the treatment plant, wastewater is processed into clean water, which is then safely discharged into the Snoqualmie River. The remaining solids, or biomass, a byproduct of the treatment process, are collected and transported to an approved disposal facility.  

Water Service

The City currently serves approximately 2,978 commercial and residential customer connections within its retail water service area, which extends beyond city limits. While the city itself spans about 2.5 square miles, the retail water service area covers roughly 3.5 square miles, with a future expansion area of approximately 5.6 square miles. The city's water infrastructure includes 46 miles of water main, two storage reservoirs with a combined capacity of 2.5 million gallons (MG), one pump station, two supply connections from Seattle Public Utilities (SPU), from whom we purchase wholesale water. Additionally, the system features four pressure zones, three pressure reliefs stations, and 12 pressure reducing stations.

Stormwater Services

The City currently serves over 2,800 commercial and residential accounts, managing approximately 37 miles of storm drainage collection pipes and ditches. The system also includes 170 water quality treatment facilities (vaults, detention pipes, ponds, etc.), as well as over 2,500 public and private catch basins.