Central Kitsap Sewage Treatment Plant

Design Capacity
Average flow for the maximum month: 6.0 million gallons per day
Influent BOD5 loading for the maximum month: 14,100 pounds per day
Influent TSS loading for the maximum month: 11,400 pounds per day

[ Flow Process Diagram ]

Key Facts:

• Treated 1.25 billion gallons of sewage in 2009

• The average daily flow in 2009 was 3.4 million gallons of sewage.

• Removed 95 percent of the suspended solids and 96 percent of the Biochemical Oxygen Demand (BOD) before discharging the effluent into Puget Sound

• Accepted 4.45 million gallons of septage from around the County

• 910 dry tons of Biosolids were transported to either Eastern or Southwestern Washington for composting or land application

[ Map of Public Works Sewage Treatment Facilities ]

This Sewage Treatment Plant is a regional facility designed to serve the central area of Kitsap County. The facility began operating in 1979 as a conventional activated sludge - secondary treatment facility. The treatment plant provides sewage service for the cities of Silverdale, Keyport, and Poulsbo, the Central Kitsap area, the Naval Submarine Base Bangor, and the Naval Undersea Warfare Engineering Station at Keyport.

The effluent from the Central Kitsap Treatment Plant is discharged to Port Orchard Bay, Puget Sound. The effluent is discharged approximately 3,200 feet offshore at a depth of 46 feet below mean low water.

Accomplishments
Washington State Department of Ecology recognized this facility as an "Outstanding Wastewater Treatment Plant" for 2006.  The "Outstanding Performance Award", also from the Department of Ecology, was received for 2007 and 2009. Congratulations to the staff and Operators for outstanding performance.

Kitsap County Public Works
Sewer Utility Division
(360) 337-5777 or (800) 825-4940
Kitsap1@co.kitsap.wa.us