Does a detection mean the water is unsafe or out of compliance?

No. UCMR 5 is monitoring data and does not indicate compliance or noncompliance with any drinking-water standard. It reports the highest single detected result at the entry point, which is information you can act on by testing your own tap and choosing a certified filter.

PFAS detected in New York water systems

Q: Which New York water systems had PFAS detected in EPA UCMR 5?

EPA UCMR 5 detected PFOA or PFOS at or above 6 parts per trillion in 13 large New York public water systems (each serving more than 10,000 people). Select a system to see the specific PFAS and highest levels detected.

EPA UCMR 5 monitoring (2023–2025) detected PFOA or PFOS at or above 6 parts per trillion in these 13 large New York public water systems, each serving more than 10,000 people. Select a system to see exactly what was detected and the certified filters that reduce it.

New York systems, highest detections first

Water system	PFOA (ppt)	PFOS (ppt)	vs. 4 ppt reference
Garden City Park WD	19	—	4.8×
Suffolk County Water Authority	6.5	17.4	4.3×
Veolia Water NY	14	6.8	3.5×
Corning City	12.2	—	3×
Albertson WD	12	6.9	3×
Wa of Western Nassau	10	6.1	2.5×
Nyack Village Water Supply	9.8	5.2	2.5×
Westbury WD	7.6	—	1.9×
Suffern Village	7.4	5.9	1.9×
Watertown City	7.3	—	1.8×
Yorktown Consold. Water Dist.#1	6.9	—	1.7×
St James Water District	6.5	4.1	1.6×
Suez Water Westchester, Inc. RD2	6.5	—	1.6×

Highest single EPA UCMR 5 detections (2023–2025), in parts per trillion. The last column is the multiple of the 4 ppt federal reference level for PFOA/PFOS — shown as context only, not a compliance or health determination. — means the compound was not detected at or above 6 ppt.

Not sure what's in your own water? Test it first, then run the selector for a recommendation matched to your home, or read what PFAS is and how it's removed.