South Bend Water Treatment Plant

City of South Bend, 
Washington

South Bend Water Treatment Plant

Service Type: 
Project Highlights: 
  • New 600-gpm microfiltration plant.
  • Multiple-barrier approach to water treatment.
  • First municipal, lowpressure membrane water treatment plant in the State of Washington.
South Bend low-pressure membrane water treatment plant
Carollo provided pilot testing, planning design, and construction services to the City of South Bend for the first low-pressure membrane water treatment plant in the State of Washington.

The City of South Bend was operating an aging pressure filtration plant. The Washington State Department of Health determined that the process was not achieving any disinfection/removal credit and deemed South Bend to be out of compliance with the Surface Water Treatment Rule.

South Bend hired Carollo to perform a pilot-testing program to evaluate low-pressure membrane filtration to meet the current and proposed future regulations. Following successful pilot testing and a subsequent predesign report, South Bend retained Carollo to provide planning, design, and construction services for a new 600-gpm microfiltration plant on a site adjacent to the its existing water treatment facility.

The new treatment plant processes include:

  • Pre-filtration.
  • A raw water pumping station.
  • Skid-mounted microfiltration units.
  • A CT basin and clearwell.
  • A finished water pumping station.

This new plant will provide a multiple-barrier approach to treatment. Designed for a future expansion capacity of up to 900-gpm, the South Bend Water Treatment Plant will be the first municipal low-pressure membrane water treatment plant in the State of Washington. Carollo provided pilot testing, planning design, and construction services to the City of South Bend for the first low-pressure membrane water treatment plant in the State of Washington.