Cypress Hills Water Hardness & Quality Report (2026)

Cypress Hills, New York, a neighborhood straddling the Brooklyn–Queens border in New York City — an historically diverse neighborhood with large Bangladeshi-American, Dominican-American, and African-American communities, adjacent to Cypress Hills Cemetery and Jackie Robinson Parkway — receives its municipal water supply from the New York City Department of Environmental Protection (DEP) Catskill–Delaware and Croton Aqueduct systems, distributed through the Brooklyn borough water distribution network. Water hardness in Cypress Hills measures 103 mg/L — classified as moderately hard.

Cypress Hills' moderate hardness — somewhat harder than some Brooklyn zones but in the moderate range for eastern Brooklyn — reflects the eastern Brooklyn distribution infrastructure in the Brooklyn–Queens border zone. Cypress Hills developed primarily in the 1900s–1920s as an industrial and working-class residential neighborhood adjacent to the cypress-forested hills that gave the neighborhood its name. The Brooklyn DEP distribution infrastructure in eastern Brooklyn — the Cypress Hills–East New York–Brownsville corridor — includes cast-iron mains of the early 20th century era. These moderately aged mains accumulate moderate mineral content from the soft Catskill–Delaware source, producing the moderate 103 mg/L at Cypress Hills.

At 103 mg/L, Cypress Hills residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. NYC DEP consistently delivers water meeting all New York State DOH and EPA Safe Drinking Water Act requirements.