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Community Water System · PWS NY5503373

Kerhonkson Water District

Ellenville, New York 12428 - drinking water served from groundwater sources to 495 people, tracked in EPA SDWIS and UCMR5.

495
People served
439
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 439 drinking-water violations at Kerhonkson Water District - above the New York per-system average.

439
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
495
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Kerhonkson Water District

Kerhonkson Water District is a local-owned community water system that delivers drinking water to 495 residents in Ellenville, New York (Ulster County) through 219 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 439 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 417 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 25 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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. Statewide, 129 of 332 UCMR5-tested systems have reported PFAS detections (38.9%).

Kerhonkson Water District's 439 violations sit above the New York average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
495
Total Violations
439
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
219
County
Ulster
School/Daycare
No
MCL Violations
0
Monitoring Violations
417
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 25 2009
Nitrate MR 13 2007
ETHYLENE DIBROMIDE MR 9 2005
Endrin MR 8 2005
BHC-GAMMA MR 8 2005
Aldicarb sulfoxide MR 8 2005
Aldicarb sulfone MR 8 2005
Carbofuran MR 8 2005
LASSO MR 8 2005
Heptachlor MR 8 2005
Heptachlor epoxide MR 8 2005
2,4-D MR 8 2005
2,4,5-TP MR 8 2005
Pentachlorophenol MR 8 2005
Total Polychlorinated Biphenyls (PCB) MR 8 2005
Lead and Copper Rule MR 8 2008
Methoxychlor MR 8 2005
Atrazine MR 8 2005
Aldicarb MR 8 2005
Chlordane MR 8 2005
Toxaphene MR 8 2005
Consumer Confidence Rule Other 6 2010
1,2,4-Trichlorobenzene MR 6 2006
cis-1,2-Dichloroethylene MR 6 2006
DICHLOROMETHANE MR 6 2006
p-Dichlorobenzene MR 6 2006
Vinyl chloride MR 6 2006
1,1-Dichloroethylene MR 6 2006
1,2-Dichloroethane MR 6 2006
1,1,1-Trichloroethane MR 6 2006

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 Kerhonkson Water District.

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 NY5503373 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 Kerhonkson Water District 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
2010 Consumer Confidence Rule Other 6 SDWIS / NY5503373 / 7000
2009 Coliform (TCR) MR 25 SDWIS / NY5503373 / 3100
2008 Lead and Copper Rule MR 8 SDWIS / NY5503373 / 5000
2008 TTHM MR 6 SDWIS / NY5503373 / 2950
2008 Total Haloacetic Acids (HAA5) MR 6 SDWIS / NY5503373 / 2456
2007 Nitrate MR 13 SDWIS / NY5503373 / 1040
2006 1,2,4-Trichlorobenzene MR 6 SDWIS / NY5503373 / 2378
2006 cis-1,2-Dichloroethylene MR 6 SDWIS / NY5503373 / 2380
2006 DICHLOROMETHANE MR 6 SDWIS / NY5503373 / 2964
2006 p-Dichlorobenzene MR 6 SDWIS / NY5503373 / 2969
2006 Vinyl chloride MR 6 SDWIS / NY5503373 / 2976
2006 1,1-Dichloroethylene MR 6 SDWIS / NY5503373 / 2977
2006 1,2-Dichloroethane MR 6 SDWIS / NY5503373 / 2980
2006 1,1,1-Trichloroethane MR 6 SDWIS / NY5503373 / 2981
2006 Trichloroethylene MR 6 SDWIS / NY5503373 / 2984

How Kerhonkson Water District Compares

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

Metric Kerhonkson Water District New York avg Federal benchmark
Total violations 439 68.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 3.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 495 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Kerhonkson Water District water safe to drink? ▼
Kerhonkson Water District (PWS ID: NY5503373) has 439 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 495 people using Groundwater sources.
How many people does Kerhonkson Water District serve? ▼
Kerhonkson Water District serves 495 people in Ellenville, New York. It is a Local-owned system using Groundwater water sources with 219 service connections.
What type of violations does Kerhonkson Water District have? ▼
Kerhonkson Water District has 439 total violations: 0 health-based violations (MCL exceedances or treatment failures), 417 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Kerhonkson Water District water? ▼
No PFAS testing data is available for Kerhonkson Water District under the EPA's UCMR5 monitoring program.
What water source does Kerhonkson Water District use? ▼
Kerhonkson Water District uses Groundwater 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.