Palmer River Desalination

Swansea, Massachusetts

Client: Swansea Water District


  • Bidding Administration
  • Construction Administration
  • Design
  • Permitting
  • Pilot Testing
  • Program Management
  • Resident Project Representation
  • Source Investigation
  • State Funding

Project Summary

The Swansea Desalination Project includes the development of a new surface water intake in a coastal river, a new water treatment plant, a new river diffuser, storage tanks and several miles of pipelines. Hoyle, Tanner, through its Prism Environmental division, is program manager and lead engineer for this innovative project. The proposed treatment plant will treat brackish water from the Palmer River and the discharge from an existing well supply. The river water will receive microfiltration pre-treatment for the reverse osmosis desalination process. The well supply will be aerated and filtered using microfiltration to reduce carbon dioxide and remove organic precursors that result in chlorinated disinfection byproducts. The treatment plant is sized to produce 2.2 mgd. Waste streams produced will go to on-site solids dewatering lagoons and the river. Currently, the project is in final design and final permitting. Treatment pilot-testing and membrane equipment procurement have been completed.

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