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KNOLLS WATER CO., INC.

PWS ID: NY3503563 · WEST NYACK, New York 10994

KNOLLS WATER CO., INC. serves 230 people in WEST NYACK, New York using Groundwater water sources. It has 131 recorded EPA violations, including 11 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: KNOLLS WATER CO., INC.

KNOLLS WATER CO., INC. is a private-owned community water system that delivers drinking water to 230 residents in WEST NYACK, New York (Orange County) through 79 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 131 total violations for this system , of which 11 (8%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 109 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 23 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. KNOLLS WATER CO., INC.'s 131 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.

Population Served
230
Total Violations
131
Health-Based Violations
11
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
79
County
Orange
School/Daycare
No
MCL Violations
7
Monitoring Violations
109
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 23 2007
Coliform (TCR) MCL 7 2010
Revised Total Coliform Rule MON 6 2025
1,2,4-Trichlorobenzene MR 4 1998
p-Dichlorobenzene MR 4 1998
Vinyl chloride MR 4 1998
trans-1,2-Dichloroethylene MR 4 1998
1,2-Dichloropropane MR 4 1998
Trichloroethylene MR 4 1998
1,1,2-Trichloroethane MR 4 1998
CHLOROBENZENE MR 4 1998
Benzene MR 4 1998
Ethylbenzene MR 4 1998
Lead and Copper Rule TT 4 2001
1,1-Dichloroethylene MR 4 1998
Toluene MR 4 1998
1,1,1-Trichloroethane MR 4 1998
Carbon tetrachloride MR 4 1998
1,2-Dichloroethane MR 4 1998
Tetrachloroethylene MR 4 1998
cis-1,2-Dichloroethylene MR 4 1998
DICHLOROMETHANE MR 4 1998
Styrene MR 4 1998
o-Dichlorobenzene MR 4 1998
Consumer Confidence Rule Other 1 2000

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 KNOLLS WATER CO., INC..

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 NY3503563 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 KNOLLS WATER CO., INC. 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
2025 Revised Total Coliform Rule MON 6 SDWIS / NY3503563 / 8000
2010 Coliform (TCR) MCL 7 SDWIS / NY3503563 / 3100
2007 Lead and Copper Rule MR 23 SDWIS / NY3503563 / 5000
2001 Lead and Copper Rule TT 4 SDWIS / NY3503563 / 5000
2000 Consumer Confidence Rule Other 1 SDWIS / NY3503563 / 7000
1998 1,2,4-Trichlorobenzene MR 4 SDWIS / NY3503563 / 2378
1998 p-Dichlorobenzene MR 4 SDWIS / NY3503563 / 2969
1998 Vinyl chloride MR 4 SDWIS / NY3503563 / 2976
1998 trans-1,2-Dichloroethylene MR 4 SDWIS / NY3503563 / 2979
1998 1,2-Dichloropropane MR 4 SDWIS / NY3503563 / 2983
1998 Trichloroethylene MR 4 SDWIS / NY3503563 / 2984
1998 1,1,2-Trichloroethane MR 4 SDWIS / NY3503563 / 2985
1998 CHLOROBENZENE MR 4 SDWIS / NY3503563 / 2989
1998 Benzene MR 4 SDWIS / NY3503563 / 2990
1998 Ethylbenzene MR 4 SDWIS / NY3503563 / 2992

How KNOLLS WATER CO., INC. Compares

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

Metric KNOLLS WATER CO., INC. New York avg Federal benchmark
Total violations 131 68.2 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 11 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 230 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 KNOLLS WATER CO., INC. water safe to drink? ▼
KNOLLS WATER CO., INC. (PWS ID: NY3503563) has 131 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 230 people using Groundwater sources.
How many people does KNOLLS WATER CO., INC. serve? ▼
KNOLLS WATER CO., INC. serves 230 people in WEST NYACK, New York. It is a Private-owned system using Groundwater water sources with 79 service connections.
What type of violations does KNOLLS WATER CO., INC. have? ▼
KNOLLS WATER CO., INC. has 131 total violations: 11 health-based violations (MCL exceedances or treatment failures), 109 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in KNOLLS WATER CO., INC. water? ▼
No PFAS testing data is available for KNOLLS WATER CO., INC. under the EPA's UCMR5 monitoring program.
What water source does KNOLLS WATER CO., INC. use? ▼
KNOLLS WATER CO., INC. 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.

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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.

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