East Grove Street Water Treatment Plant

Weston & Sampson is helping the Town of Middleborough, Massachusetts, replace its aging East Grove Street Water Treatment Plant with a new 500-gallon-per-minute facility designed to treat iron, manganese, and PFAS.

Our 2022 evaluation determined that the existing plant had reached the end of its useful life and that the source well exceeded Massachusetts PFAS6 limits. Following treatment pilot studies, our team designed a 9,500-square-foot facility incorporating biological treatment for iron and manganese and granular activated carbon (GAC) for PFAS removal.

The new plant includes treatment areas, DPW administrative space, a laboratory, and staff facilities. The project also includes rehabilitation of the historic pump house and a vehicle storage facility. Design considerations included floodplain mitigation, historic restoration, archaeological investigations, hazardous building materials assessment, and MassDOT permitting.

Construction of the new WTP began in June 2025, with WES Construction as the contractor. Construction is currently underway, with the new facility anticipated to come online in September 2027. Weston & Sampson is supporting the town throughout construction by providing construction administration and State Revolving Fund (SRF) funding assistance.

Iron, Manganese, and PFAS Piloting

In 2023, Weston & Sampson conducted a three-month pilot comparing biological and greensand treatment for iron and manganese. Biological treatment was selected for its effectiveness and consistency with the town’s existing operations. A separate six-month pilot compared ion exchange resin and GAC for PFAS removal, with GAC selected for full-scale design.

Location

Middleborough, MA

Industry

Municipal

Services

Water, Architecture & Facilities

Iron, Manganese, and PFAS Piloting

Weston & Sampson is helping Middleborough replace its aging East Grove Street Water Treatment Plant with a new facility designed to remove iron, manganese, and PFAS. Services include treatment piloting, design, construction administration, and funding assistance, with startup anticipated in September 2027.