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CORNWALL-ON-HUDSON

PWS ID: NY3503526 · CORNWALL-ON-HUDSON, New York 12520

CORNWALL-ON-HUDSON serves 9,700 people in CORNWALL-ON-HUDSON, New York using Surface Water water sources. It has 961 recorded EPA violations, including 6 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: CORNWALL-ON-HUDSON

CORNWALL-ON-HUDSON is a local-owned community water system that delivers drinking water to 9,700 residents in CORNWALL-ON-HUDSON, New York (Orange County) through 2,671 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 961 total violations for this system , of which 6 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 927 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Benzene, recorded in 24 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 0.0148 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across New York, EPA tracks 8,098 public water systems serving 19,294,951 people, with 552,003 cumulative violations and 26,817 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 68.2 violations. CORNWALL-ON-HUDSON's 961 violations sit above the New York average. Statewide, 129 of 332 UCMR5-tested systems have reported PFAS detections (38.9%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
9,700
Total Violations
961
Health-Based Violations
6
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,671
County
Orange
School/Daycare
No
MCL Violations
1
Monitoring Violations
927
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Benzene MR 24 2015
Di(2-ethylhexyl) adipate MR 24 2013
Lead and Copper Rule MR 22 2018
Nitrate MR 21 2015
Endrin MR 20 2013
BHC-GAMMA MR 20 2013
Toxaphene MR 20 2013
Dalapon MR 20 2013
Di(2-ethylhexyl) phthalate MR 20 2013
Hexachlorocyclopentadiene MR 20 2013
Carbofuran MR 20 2013
LASSO MR 20 2013
Heptachlor MR 20 2013
Heptachlor epoxide MR 20 2013
ETHYLENE DIBROMIDE MR 20 2013
Benzo(a)pyrene MR 20 2013
Pentachlorophenol MR 20 2013
Total Polychlorinated Biphenyls (PCB) MR 20 2013
OXAMYL MR 20 2013
Picloram MR 20 2013
Aldicarb sulfoxide MR 20 2013
Aldicarb sulfone MR 20 2013
Aldicarb MR 20 2013
Atrazine MR 20 2013
2,4,5-TP MR 20 2013
HEXACHLOROBENZENE MR 20 2013
Simazine MR 20 2013
Methoxychlor MR 20 2013
2,4-D MR 20 2013
Chlordane MR 20 2013

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 150 samples detected PFAS.

Contaminant Date Result MRL Status
NEtFOSAA 9/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 9/29/2025 0.0148 µg/L 0.006 µg/L Detected
PFTrDA 9/29/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/29/2025 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/29/2025 <9 µg/L 9 µg/L Not Detected
PFDoA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/29/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 9/29/2025 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 9/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 9/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 9/29/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/14/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFNA 7/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 7/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/14/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 7/14/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 7/14/2025 <0.004 µg/L 0.004 µg/L Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for CORNWALL-ON-HUDSON.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NY3503526 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New York Drinking Water Authority

New York State Department of Health — Public Water Systems is the primacy agency that licenses and inspects CORNWALL-ON-HUDSON under EPA-delegated authority.

Open NY regulator portal

Source: New York State Department of Health — Public Water Systems

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2018 Lead and Copper Rule MR 22 SDWIS / NY3503526 / 5000
2017 Consumer Confidence Rule Other 16 SDWIS / NY3503526 / 7000
2017 TTHM MR 8 SDWIS / NY3503526 / 2950
2017 Total Haloacetic Acids (HAA5) MR 4 SDWIS / NY3503526 / 2456
2015 Benzene MR 24 SDWIS / NY3503526 / 2990
2015 Nitrate MR 21 SDWIS / NY3503526 / 1040
2013 Di(2-ethylhexyl) adipate MR 24 SDWIS / NY3503526 / 2035
2013 Endrin MR 20 SDWIS / NY3503526 / 2005
2013 BHC-GAMMA MR 20 SDWIS / NY3503526 / 2010
2013 Toxaphene MR 20 SDWIS / NY3503526 / 2020
2013 Dalapon MR 20 SDWIS / NY3503526 / 2031
2013 Di(2-ethylhexyl) phthalate MR 20 SDWIS / NY3503526 / 2039
2013 Hexachlorocyclopentadiene MR 20 SDWIS / NY3503526 / 2042
2013 Carbofuran MR 20 SDWIS / NY3503526 / 2046
2013 LASSO MR 20 SDWIS / NY3503526 / 2051

How CORNWALL-ON-HUDSON Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric CORNWALL-ON-HUDSON New York avg Federal benchmark
Total violations 961 68.2 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 6 3.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 38.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 9,700 2,383 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 8,098 regulated public water systems in New York.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CORNWALL-ON-HUDSON water safe to drink? ▼
CORNWALL-ON-HUDSON (PWS ID: NY3503526) has 961 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 9,700 people using Surface Water sources.
How many people does CORNWALL-ON-HUDSON serve? ▼
CORNWALL-ON-HUDSON serves 9,700 people in CORNWALL-ON-HUDSON, New York. It is a Local-owned system using Surface Water water sources with 2,671 service connections.
What type of violations does CORNWALL-ON-HUDSON have? ▼
CORNWALL-ON-HUDSON has 961 total violations: 6 health-based violations (MCL exceedances or treatment failures), 927 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CORNWALL-ON-HUDSON water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in CORNWALL-ON-HUDSON's water supply: NMeFOSAA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does CORNWALL-ON-HUDSON use? ▼
CORNWALL-ON-HUDSON uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial