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Construction to start next month on Rye Lake Drinking Water Filtration Plant in West Harrison

Westchester Joint Water Works will be starting construction in the next month on the Rye Lake Drinking Water Filtration Plant in West Harrison.

Julia Rosier

Sep 26, 2025, 6:12 PM

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About 100,000 Westchester residents are going to be getting cleaner drinking water.

Westchester Joint Water Works will be starting construction in the next month on the Rye Lake Drinking Water Filtration Plant in West Harrison.

It will be located on Purchase Street, near the lake and next to the Westchester County Airport.

"This is going to be the plant of the future," says Chair of WJWW Board of Trustees and Mamaroneck Town Supervisor Jaine Elkind Eney. "This means clean, safe drinking water for 100,000 Westchester County residents for generations to come."

The project has been in the works for 20 years and will be $185 million.

It'll serve multiple communities, including the towns and villages of Harrison and Mamaroneck, Larchmont, Rye, Rye Brook, Port Chester, North Castle and New Rochelle.

The project is expected to be completed by early 2029.

Westchester Joint Water Works says this new plant will also allow them to be better prepared if any toxic chemicals enter the system.

"It will position us well should we have to supplement the filtration process with additional treatments to address those emergent contaminants," says WJWW Manager Paul Kutzy.

Residents say it's needed.

"If it's going to provide cleaner drinking water then yes," says West Harrison resident Stephanie Bridger. "We could always use more clean drinking water."

Westchester Joint Water Works says this plant will increase water rates.

Residents told News 12 off camera this was a big concern for them.

WJWW says currently, the average cost to consumers of one gallon of WJWW fully treated water is a little over $0.012 per gallon.

The Water Filtration Plant Project is likely to raise the cost per gallon of water to around $0.020 per gallon five years from now.

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