Manchester Wastewater Treatment Plant

The primary source of wastewater 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 wastewater from the Manchester Naval Fuel Depot consists of domestic wastewater 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.

Accomplishments
The Manchester Treatment Plant has the received the Washington State Department of Ecology, Outstanding Performance Award for 11 consecutive years.  This is a record setting accomplishment.  Congratulations to the staff of Operators for an outstanding performance!

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 72  million gallons of wastewater in 2007
• The average daily flow in 2007 was 196,000 gallons of wastewater
• Removed 97 percent of the suspended solids and 97 percent of the Biochemical Oxygen Demand (BOD) before discharging the effluent into Puget Sound
• 227,000 gallons of sludge (38 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
Waste Water Division
(360) 337-5777 or (800) 825-4940
openline@co.kitsap.wa.us