Westchester County tap water
4 of 27 water systems serving Westchester County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 89 community water systems list this county as served; 26 serve 3,300+ people with full PFAS testing.
- 12 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Yonkers City | Purchased surface water | 211,569 | No | 0 |
| Veolia Water New York, Inc. Rd-1 | Purchased surface water | 146,732 | No | 0 |
| Mount Vernon Water department | Purchased surface water | 73,893 | No | 0 |
| Westchester Joint Water Works | Surface water | 59,629 | No | 0 |
| White Plains City | Purchased surface water | 59,559 | No | 0 |
| Veolia Water New York, Inc. Rd-2 | Purchased surface water | 57,301 | Yes | 0 |
| Greenburgh Consolidated Wd #1 | Purchased surface water | 43,312 | No | 0 |
| Yorktown Consold. Water Dist.#1 | Purchased surface water | 36,000 | Yes | 0 |
| Ossining Water department | Surface water | 30,000 | No | 0 |
| Cortlandt Consolidated Wd | Purchased surface water | 28,369 | No | 0 |
| Peekskill City | Surface water | 24,272 | No | 0 |
| Scarsdale Water department | Purchased surface water | 21,649 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.