Water Quality in New York City, NY
Detailed water quality data for New York City, New York including contaminant levels, EPA comparisons, AquaScore™ grading, and treatment recommendations.
Water utility: NYC Department of Environmental Protection.
Water source: Catskill/Delaware Watershed, Croton Watershed.
Key Contaminants Found
- Haloacetic acids (HAA5)
- Total trihalomethanes (TTHMs)
- Chromium (hexavalent)
- Lead
- Chloroform
NYC operates the largest unfiltered surface water supply in the US, drawing from protected Catskill Mountain watersheds. Water quality at the source is exceptional, but aging building plumbing introduces lead and copper at the tap.