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







Manchester Sewage Treatment Plant

Manchester Treatment Plant

The primary source of sewage to the Manchester Treatment Plant is domestic sewage from residential and light commercial activities in the Town of Manchester. In addition, the facility receives domestic wastewater from the Manchester State Park and laboratory wastewater from the Environmental Protection Agency (EPA) laboratory in Manchester. The sewage from the Manchester Naval Fuel Depot consists of domestic sewage from on-shore facilities as well as gray water from the ships that dock at the Naval Fuel Depot.

The Manchester Treatment Plant effluent is discharged 880 feet from the shoreline of Puget Sound at a depth of 60 feet below the mean low water.

The Manchester Treatment Plant has the received the Washington State Department of Ecology, Outstanding Performance Award for 20 consecutive years. This is a record setting accomplishment.  Congratulations to the staff of Operators for an outstanding performance!

Manchester Treatment Plant award presentation

The Manchester Treatment Plant was featured in Treatment Plant Operator magazine after winning the award for 16 consecutive years. Read the article here.

Design Capacity
Average flow for the maximum month: 0.46 million gallons per day
Influent BOD5 loading for the maximum month: 832 pounds per day
Influent TSS loading for the maximum month: 832 pounds per day

[ Flow Process Diagram ]

Key Facts:

  • Treated 68 million gallons of sewage in 2015
  • The average daily flow in 2015 was 186,000 gallons of sewage
  • Removed 98 percent of the suspended solids and 98 percent of the Biochemical Oxygen Demand (BOD) before discharging the effluent into Puget Sound
  • 189,000 gallons of sludge (33 dry tons of Biosolids) were transported by truck to the Central Kitsap Treatment Plant for further processing

[ Map of Public Works Waste Treatment Facilities ]

Kitsap County Public Works
Sewer Utility Division
(360) 337-5777 or (800) 825-4940

Updated:  June 01, 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