New York PFAS results from EPA's final data
Report published Nov 14, 2026 · EPA UCMR 5 final data file of Oct 15, 2026 (samples collected 2023–2025) · Method · National results →
31 New York water systems serving 1.9 million people had PFAS above a 2024 federal limit in EPA's final round of nationwide PFAS testing: 10% of the 322 New York systems tested, compared with 11% nationally.
Highest PFOA or PFOS averages in New York
- Yeshiva Farm Settlement Water System New Castle · PFOS94.5 ppt
- Suffolk County Water Authority Brookhaven · PFOS12.1 ppt
- Veolia Water New York Clarkstown · PFOA9.95 ppt
- Sidney Village Water System Sidney · PFOA9.9 ppt
- Garden City Park Water District New Hyde Park · PFOA9.5 ppt
- Arrow Park Inc. Cws Monroe · PFOA8.85 ppt
- Nyack Village Water Supply Nyack · PFOA8.75 ppt
- Brinkerhoff Water District Fishkill · PFOA7.95 ppt
- Monroe Village Water System Monroe · PFOA7.52 ppt
- Suffern Village Water System Ramapo · PFOA7.4 ppt
- Harriman Village Water System Harriman · PFOS7.15 ppt
- Westbury Water District Westbury · PFOA6.3 ppt
- Yorktown Consolidated Water District #1 Yorktown · PFOA6.25 ppt
- Heritage Hills Water System Somers · PFOA6.15 ppt
- Corning City Water System Corning · PFOA6.1 ppt
Chart data as a table
| System | ppt |
|---|---|
| Yeshiva Farm Settlement Water System · New Castle · PFOS | 94.5 |
| Suffolk County Water Authority · Brookhaven · PFOS | 12.1 |
| Veolia Water New York · Clarkstown · PFOA | 9.95 |
| Sidney Village Water System · Sidney · PFOA | 9.9 |
| Garden City Park Water District · New Hyde Park · PFOA | 9.5 |
| Arrow Park Inc. Cws · Monroe · PFOA | 8.85 |
| Nyack Village Water Supply · Nyack · PFOA | 8.75 |
| Brinkerhoff Water District · Fishkill · PFOA | 7.95 |
| Monroe Village Water System · Monroe · PFOA | 7.52 |
| Suffern Village Water System · Ramapo · PFOA | 7.4 |
| Harriman Village Water System · Harriman · PFOS | 7.15 |
| Westbury Water District · Westbury · PFOA | 6.3 |
| Yorktown Consolidated Water District #1 · Yorktown · PFOA | 6.25 |
| Heritage Hills Water System · Somers · PFOA | 6.15 |
| Corning City Water System · Corning · PFOA | 6.1 |
Largest systems above a limit
| # | System | People served |
|---|---|---|
| 1 | Suffolk County Water Authority Brookhaven Above: PFOA, PFOS | 1.1 million |
| 2 | Veolia Water New York Clarkstown Above: PFOA | 270,000 |
| 3 | Water Authority of Western Nassau Hempstead Above: PFOA | 120,000 |
| 4 | Veolia Water New York, Inc. Rd-2 Rye Above: PFOA | 57,301 |
| 5 | City of Binghamton Binghamton Above: PFOS | 47,600 |
| 6 | Manhasset Lakeville Water District North Hempstead Above: PFOA | 43,000 |
| 7 | Yorktown Consolidated Water District #1 Yorktown Above: PFOA | 36,000 |
| 8 | Glen Cove City Water System Glen Cove Above: PFOA | 28,000 |
| 9 | Village of Garden City Garden City Above: PFOS | 23,272 |
| 10 | Village of Mineola Mineola Above: PFOA | 20,600 |
All 31 New York systems above a limit
Every New York community water system whose UCMR 5 results averaged above a 2024 federal PFAS limit, largest first. Systems that were not tested are not listed: not tested is not the same as not detected.
Full list: 31 systems, largest first
| System | People served |
|---|---|
| Suffolk County Water Authority Brookhaven Above: PFOA, PFOS | 1.1 million |
| Veolia Water New York Clarkstown Above: PFOA | 270,000 |
| Water Authority of Western Nassau Hempstead Above: PFOA | 120,000 |
| Veolia Water New York, Inc. Rd-2 Rye Above: PFOA | 57,301 |
| City of Binghamton Binghamton Above: PFOS | 47,600 |
| Manhasset Lakeville Water District North Hempstead Above: PFOA | 43,000 |
| Yorktown Consolidated Water District #1 Yorktown Above: PFOA | 36,000 |
| Glen Cove City Water System Glen Cove Above: PFOA | 28,000 |
| Village of Garden City Garden City Above: PFOS | 23,272 |
| Village of Mineola Mineola Above: PFOA | 20,600 |
| Westbury Water District Westbury Above: PFOA | 20,500 |
| Garden City Park Water District New Hyde Park Above: PFOA | 18,000 |
| Roslyn Water District Roslyn Above: PFOA | 17,000 |
| Nyack Village Water Supply Nyack Above: PFOA, PFOS | 14,700 |
| Albertson Water District North Hempstead Above: PFOA | 13,500 |
| Suffern Village Water System Ramapo Above: PFOA, PFOS | 12,000 |
| Monroe Village Water System Monroe Above: PFOA | 12,000 |
| Corning City Water System Corning Above: PFOA | 10,300 |
| Chenango Consolidated Water District #1 Chenango Above: PFOA | 9,200 |
| Locust Valley Water District Oyster Bay Above: PFNA, Hazard Index | 7,500 |
| Village of Williston Park Williston Park Above: PFOA | 7,287 |
| Harriman Village Water System Harriman Above: PFOS | 5,000 |
| Waverly Village Water System Barton Above: PFOA | 4,830 |
| Heritage Hills Water System Somers Above: PFOA, PFOS | 4,700 |
| Sidney Village Water System Sidney Above: PFOA, PFOS | 3,800 |
| Brinkerhoff Water District Fishkill Above: PFOA, PFOS | 3,788 |
| Chester Village Water System Chester Above: PFOA | 3,448 |
| Greenfield Water District Hyde Park Above: PFOS | 1,050 |
| Yeshiva Farm Settlement Water System New Castle Above: PFOA, PFOS, PFHxS, Hazard Index | 300 |
| Arrow Park Inc. Cws Monroe Above: PFOA | 83 |
| North Point Creek Apartments Ltd. Water System Catskill Above: PFOS | 35 |
The same list, with PFOA and PFOS averages, is in the data download.
Which limits were exceeded
| PFAS | Federal limit | Systems above it |
|---|---|---|
| PFOA 1.8 million people | 4 ppt | 25 |
| PFOS 1.2 million people | 4 ppt | 12 |
| PFHxS 300 people | 10 ppt | 1 |
| PFNA 7,500 people | 10 ppt | 1 |
| GenX (HFPO-DA) | 10 ppt | 0 |
| Hazard Index 7,800 people | 1 | 2 |
"–" in the table above means not detected. A system can be above more than one limit. EPA proposed in May 2026 to rescind the PFHxS, PFNA, GenX and Hazard Index limits. That proposal is not final.
New York has its own PFAS rules. State MCLs set in 2020. NYSDOH says systems must meet them until federal 4 ppt MCLs apply in 2029. Details. This report compares results with the federal limits only.
Data and how to cite it
- Download every New York water system as CSV (PFOA and PFOS averages, systems above a limit, lead, violations).
- EPA's source file: UCMR 5 occurrence data.
Suggested citation:
Tap Water Results, "New York PFAS results from EPA's final UCMR 5 data" (published Nov 14, 2026, EPA data file of Oct 15, 2026). https://tapwaterresults.com/pfas/new-york/
You're welcome to quote and republish these figures with a link back. Questions from reporters: see contact.
Method
For each system we average each entry point's UCMR 5 results (non-detects count as zero, complete sets of samples only) and compare the highest entry-point average with the 2024 federal limit, using EPA's rounding. This is how EPA compares UCMR 5 results to the limits in its own data summary, and our national counts match EPA's published table within 2% (how we check). Results are monitoring data from 2023–2025, not compliance determinations, and treatment installed since then is not reflected. Full method.
Questions
How many New York water systems have PFAS above the limit?
31 of the 322 New York community water systems EPA tested in 2023–2025 (10%) had at least one entry-point average above a 2024 federal PFAS limit. They serve 1.9 million people. Nationally the share is 11%.
Are these systems violating the law?
Not yet. Systems have until 2029 to meet the 2024 limits, and EPA has proposed moving the PFOA and PFOS deadline to 2031 and rescinding the other limits. EPA's UCMR 5 results are monitoring data and do not determine compliance.
Which systems were tested?
EPA's UCMR 5 tested every community water system serving more than 3,300 people and a representative sample of smaller ones. Systems that were not tested have no federal result, which is not the same as having no PFAS.
All New York water systems → · National results → · PFAS results for every state →
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.