Is Cornwall, New York tap water safe?
2 water systems report serving Cornwall. Your water depends on which one serves your address. Check your bill if unsure. This list is matched from the ZIP codes in this place, so it may include nearby systems.
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Cornwall-On-Hudson
Serves 9,700 people · Surface water · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
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Firthcliffe W.D.
Serves 450 people · Surface water · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; No UCMR 5 PFAS results on file; Latest lead 90th percentile on file is from 2006 (older than 5 years, not graded).