Morrisania Water Hardness & Quality Report (2026)

Morrisania, New York, in the Bronx — one of the Bronx's oldest neighborhoods, central to the South Bronx corridor along Third Avenue and home to a rich African-American and Latino cultural heritage — receives its municipal water from the New York City Department of Environmental Protection (NYC DEP), drawing from the Catskill-Delaware Watershed system. NYC DEP's reservoir system in the Catskill Mountains and Delaware River headwaters supplies the entire Bronx through the city's massive distribution network, with water traveling through aging tunnels and pipes to reach South Bronx communities.

The moderately hard 113.5 mg/L hardness and TDS of 229.1 mg/L are elevated compared to the typical raw NYC Catskill-Delaware supply (~65–80 mg/L), reflecting mineral accumulation characteristic of the Bronx's aging distribution infrastructure. Catskill-Delaware water itself is very soft — draining Devonian and Silurian shale, siltstone, and sandstone of the Catskill Mountains with negligible carbonate content. However, in the South Bronx's dense urban distribution network, water traveling through older iron and cement-lined mains accumulates mineral content from pipe interactions, sediment deposits, and distribution system chemical processes that raise the finished hardness above the raw reservoir baseline.

At 113.5 mg/L, Morrisania's water is moderately soft to moderate — notably harder than other Bronx and Manhattan NYC neighborhoods on the same Catskill system. Scale forms gradually in kettles and appliances over months. Quarterly descaling of heating appliances is appropriate. The PFAS level of 5.5 ppt is moderate for New York City — NYC DEP's rigorous watershed protection keeps PFAS levels well below the most contaminated US metros, though the South Bronx's industrial heritage and proximity to industrial facilities along the Harlem and East Rivers contribute some PFAS to the local profile.