Tap WaterIndex

← New York

Tap water quality report

Cornwall-On-Hudson

EPA monitoring tested this supplier for 92 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

92
contaminants tested
11
detected
9,700
people served
6
health-based violations
New York rankingsLead in New YorkPFAS in New York
Water source
Surface water
Ownership
Local government
Counties served
Orange

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

6
health-based violations
951
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2004-10-01 → 2004-12-31
TT Health-based Resolved 2004-10-01 → 2004-12-31
TT Health-based Resolved 2004-10-01 → 2004-12-31
TT Health-based Resolved 2004-10-01 → 2004-12-31
MCL Health-based Resolved 1996-07-01 → 1996-07-31
TT Health-based Resolved 1992-01-01 → 1997-09-30
Other Monitoring Resolved 2022-08-03 → 2022-08-10
Other Monitoring Resolved 2022-08-03 → 2022-08-10
MR Monitoring Resolved 2018-10-01
MR Monitoring Resolved 2018-10-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Nmefosaa 0.0148 µg/L 2/5 2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
74 µg/L 93%
of the EPA limit 80 µg/L
 95/95 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
58.1 µg/L 97%
of the EPA limit 60 µg/L
 89/95 SYR4 2012–2019
Nitrate
810 µg/L 8.1%
of the EPA limit 10000 µg/L
 20/32 SYR4 2012–2019
Barium
11 µg/L 0.5%
of the EPA limit 2000 µg/L
 14/14 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Antimony, Total
0.5100 µg/L 8.5%
of the EPA limit 6 µg/L
 1/14 SYR4 2012–2019
Cyanide
6 µg/L 3%
of the EPA limit 200 µg/L
 1/14 SYR4 2012–2019
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
 1/6 SYR4 2012–2019
Dalapon
1.9 µg/L 1%
of the EPA limit 200 µg/L
 1/12 SYR4 2013–2019
Hexachlorocyclopentadiene
0.1100 µg/L 0.2%
of the EPA limit 50 µg/L
 1/12 SYR4 2013–2019
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideLassoMercuryMethoxychlorNetfosaaNfdhaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CORNWALL-ON-HUDSON, MAYOR & VILLAGE BD
Phone
845-534-4200
Email
mayor@cornwall-on-hudson.org

Frequently asked questions about Cornwall-On-Hudson

Is Cornwall-On-Hudson tap water safe to drink?

EPA monitoring detected 11 contaminants in Cornwall-On-Hudson's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Cornwall-On-Hudson's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Nitrate, Barium, Lead, and others. The full list with the level and data source for each is above.

How many people does Cornwall-On-Hudson serve?

Cornwall-On-Hudson reports serving 9,700 people in New York, per its EPA record.

Has Cornwall-On-Hudson had any water quality violations?

The EPA has 951 violations on file for Cornwall-On-Hudson, of which 6 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.