Morris Heights Water Hardness & Quality Report (2026)

Morris Heights, New York, a neighborhood in the Bronx borough of New York City — a diverse Bronx neighborhood with a large Dominican-American and Puerto Rican community, adjacent to the Harlem River and the Washington Bridge, home of Bronx Community College (formerly New York University's Hall of Fame for Great Americans, now one of New York City's community college campuses), and a working-class Bronx residential neighborhood in the west-central Bronx — draws its municipal water supply from the Delaware and Catskill Aqueducts via the NYC DEP. Water hardness in Morris Heights measures 112.5 mg/L — classified as moderately hard.

Morris Heights' moderate hardness — harder than the very soft Catskill–Delaware source water — reflects the NYC Bronx distribution infrastructure's mineral accumulation. The NYC Delaware and Catskill aqueduct source water is very soft (calcareous-poor Devonian Catskill Formation and Hamilton Group watershed — typically 20–50 mg/L). Morris Heights' Bronx distribution infrastructure includes water mains from the early-to-mid 20th century Bronx urban buildout era, accumulating moderate mineral content from the soft source supply, producing the moderate 112.5 mg/L.

At 112.5 mg/L, Morris Heights residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. NYC DEP consistently delivers water meeting all New York State DOH and EPA Safe Drinking Water Act requirements.