Port Chester Water Hardness & Quality Report (2026)

Port Chester, New York, in Westchester County — a major south Westchester New York metropolitan community (Port Chester is a significant Westchester County village — a south Westchester village on the Connecticut border at Greenwich, CT; Port Chester has one of the most diverse and vibrant Latino-American communities in Westchester County — a significant Mexican-American and Central American immigrant community that has transformed Port Chester's downtown Abendroth Avenue and Main Street into a vibrant Latino commercial and cultural district), home of the Capitol Theatre (one of the most celebrated rock music venues in the United States — the Capitol Theatre has hosted legendary performances by the Grateful Dead, Bruce Springsteen, and many other major artists; its ongoing partnership with the Grateful Dead family makes it one of the most beloved concert venues in the Northeast), a diverse Westchester County community with a primarily Mexican-American, Puerto Rican-American, and working-class immigrant population, adjacent to Greenwich, CT and Rye, NY in the south Westchester corridor — draws its municipal water supply via United Water Westchester. Water hardness in Port Chester measures 82 mg/L — classified as moderately soft.

Port Chester's moderate softness reflects the south Westchester watershed's calcareous-poor crystalline geology. The Byram watershed drains the Precambrian New York–Connecticut gneiss (calcareous-poor). SUEZ Water treatment produces the moderately soft 82 mg/L.

With hardness at 82 mg/L, Port Chester residents enjoy moderately soft water. United Water Westchester consistently delivers water meeting all New York State DEC and EPA Safe Drinking Water Act requirements.