Gramercy Park Water Hardness & Quality Report (2026)

Gramercy Park, Manhattan, New York — a major Manhattan historic residential neighborhood (Gramercy Park is one of New York City's most prestigious and distinctive residential neighborhoods — the only private park in Manhattan (Gramercy Park itself is a 2-acre fenced private park that is accessible only to residents of the surrounding buildings who pay the annual maintenance fee and receive a key; it is the most exclusive urban green space in New York City, dating to Samuel Ruggles's 1831 real estate development; the park has remained private for nearly 200 years)); Gramercy Park is surrounded by some of the most beautiful 19th century townhouses and residential buildings in Manhattan (the neighborhood was one of the most fashionable residential areas in New York in the late 19th and early 20th centuries); home of the National Arts Club (one of the most storied private arts clubs in New York) and the Players Club (founded by Edwin Booth in 1888 — the theatrical club where some of the most significant American actors and theatrical figures have been members), a diverse New York County community with a primarily affluent professional and old-money New York residential population — draws its municipal water supply via the NYC DEP. Water hardness in Gramercy Park measures 149 mg/L — classified as moderately hard.

Gramercy Park's moderate hardness reflects the Manhattan NYC DEP distribution characteristics. The NYC DEP distributes Catskill–Delaware supply to Manhattan, producing the moderate 149 mg/L.

At 149 mg/L, Gramercy Park residents encounter moderate scale accumulation. Monthly cleaning is recommended. NYC DEP consistently delivers water meeting all New York State DEC and EPA Safe Drinking Water Act requirements.