Link to Kitsap County's Mission Statement
Public Works - Sewer Utility Division
614 Division Street, Port Orchard, WA  MS-27
Phone:(360)337-5777 * Fax:(360)337-5678






call before you dig - click here for all the information







Central Kitsap Wastewater Treatment Plant

Central Kitsap Wastewater Treatment Plant

Central Kitsap Treatment Plant Resource Recovery & Process Improvement Project
The Central Kitsap Treatment Plant Resource Recovery & Process Improvement Project in Brownsville was completed in fall of 2015. This project addresses necessary repairs and rehabilitation of outdated and undersized sewage treatment equipment and also allows for the recovery of energy by capturing methane gas for co-generation of heat and electricity. More information on the project is available here.

Central Kitsap Treatment Plant tour videoTreatment Plant Tour: Video
In collaboration with BKAT-TV, the Kitsap County Sewer Utility completed a 12-minute documentary highlighting the treatment process at the Central Kitsap Treatment Facility north of Silverdale.
Click here to watch

Tours are available to the public!
Visit the Kitsap County Public Works SEEK website to request a tour of CKTP or other Kitsap County Public Works facilities.

CKTP tour

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 1.2 billion gallons of sewage in 2015

  • The average daily flow in 2015 was 3.4 million gallons of sewage

  • Removed 94 percent of the suspended solids and 95 percent of the Biochemical Oxygen Demand (BOD) before discharging the effluent into Puget Sound

  • Accepted 4.2 million gallons of septage from around the County

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

[ Map of Public Works Wastewater Treatment Facilities ]

The Central Kitsap 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.

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
Kitsap1: 360.337.5777

Updated:  June 28, 2016

Customer Comment Form

GovDelivery Signup

Construction Contact icon
Sewer Utility Capital Improvement Projects
Sewer Service Maps

Smoke Testing
Capital Facilities Plan for 2017-2022
Five Year Rate Plan
The Road Report
Document Library
Get Adobe Acrobat Reader