Williamsburg Water Hardness & Quality Report (2026)

Williamsburg, Brooklyn, New York — a major north Brooklyn neighborhood (Williamsburg is one of the most famous neighborhoods in New York City — a former industrial and immigrant neighborhood on the East River waterfront that became one of the most prominent hipster and artistic communities in the United States in the 2000s and 2010s, undergoing dramatic gentrification while retaining significant Hasidic Jewish and Hispanic communities), a highly diverse Kings County community with a significant Hasidic Jewish-American (primarily Satmar — Williamsburg is home to one of the world's largest Satmar Hasidic communities), Puerto Rican-American, and young creative professional population, adjacent to the Williamsburg Bridge (one of the three major East River bridges connecting Brooklyn to Manhattan — a significant architectural landmark), and home of a major creative and tech industry cluster — draws its municipal water supply from the NYC Catskill–Delaware watershed via the NYC DEP. Water hardness in Williamsburg measures 67 mg/L — classified as very soft.

Williamsburg's very soft supply reflects the standard NYC Catskill–Delaware system supply and the north Brooklyn distribution zone. The NYC Catskill–Delaware supply (Schoharie, Ashokan, Cannonsville, Pepacton Reservoirs — draining calcareous-poor Devonian Catskill Mountain sandstone and shale) distributes to the Williamsburg north Brooklyn zone. The supply with standard NYC treatment produces the very soft 67 mg/L.

With hardness at 67 mg/L, Williamsburg residents enjoy very soft water. NYC DEP consistently delivers water meeting all New York State DEC and EPA Safe Drinking Water Act requirements.