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Updated 2026-10-15
County water report

Rockland County Water Quality: 3 Cities Ranked by the Records

Rockland County, New York: 3 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Rockland County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorooctanoic acid (PFOA)Detected in 3 systems4.0 ng/L federal MCL (2024) · US EPAHighest14 ng/L
LithiumDetected in 1 system of 3 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest19.1 µg/L
Perfluorooctanesulfonic acid (PFOS)Detected in 3 systems4.0 ng/L federal MCL (2024) · US EPAHighest6.8 ng/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 2 systems of 3 tested10 ng/L federal MCL (2024) · US EPAHighest6.2 ng/L
Perfluorononanoic acid (PFNA)Detected in 1 system of 3 tested10 ng/L federal MCL (2024) · US EPAHighest5.4 ng/L
Lead (90th percentile)Detected in 3 systems15 µg/L federal action level · US EPAHighest6 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 3 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest5 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 3 systems400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest7.6 ng/L
4 more contaminants detectedShow
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)Detected in 1 system of 3 testedNo federal or state limit; shown for transparencyHighest12 ng/L
Perfluorobutanoic acid (PFBA)Detected in 2 systems of 3 testedNo federal or state limit; shown for transparencyHighest6.8 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 2 systems of 3 testedNo federal or state limit; shown for transparencyHighest5.6 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 3 systemsNo federal or state limit; shown for transparencyHighest10 ng/L
19 PFAS tested, none detected in any systemShow

Tested in these 3 systems: NYACK VILLAGE WATER SUPPLY, SUFFERN VILLAGE, VEOLIA WATER NEW YORK

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
3 cities

Cities ranked by the records

Showing 3 of 3 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Rockland County3 of 3 city reports had a PFAS sample above a 2024 EPA limit
  1. New City6.8 ng/L
  2. Suffern5.9 ng/L
  3. Nyack5.6 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in New York
Lead

0of 3 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in New York
Who supplies the county

Largest water systems

  1. New CityVEOLIA WATER NEW YORK · NY4303673
    270,000 served
  2. NyackNYACK VILLAGE WATER SUPPLY · NY4303666
    14,700 served
  3. SuffernSUFFERN VILLAGE · NY4303675
    12,000 served
Questions

Frequently asked

How does Rockland County tap water compare across cities?

PurityMap ranks 3 cities in Rockland County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Suffern's main water system: SUFFERN VILLAGE · PWSID NY4303675 · Purity Score 58 (Fair) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Rockland County cities had a PFAS sample above a 2024 EPA limit?

3 of 3 Rockland County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including New City (PFOA 14 ng/L), Nyack (PFOA 9.8 ng/L), Suffern (PFOA 7.4 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 3.

Is there lead in Rockland County tap water?

Utilities report lead as a 90th-percentile result from home taps. 3 of 3 Rockland County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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