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Community Water System · PWS NY5918381

Greenbriar Subdivision

Somers, New York 10589 - drinking water served from groundwater sources to 956 people, tracked in EPA SDWIS and UCMR5.

956
People served
596
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 596 drinking-water violations at Greenbriar Subdivision - above the New York per-system average.

596
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
956
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Greenbriar Subdivision

Greenbriar Subdivision is a private-owned community water system that delivers drinking water to 956 residents in Somers, New York (Westchester County) through 242 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 596 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 584 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Endrin, recorded in 12 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%).

Greenbriar Subdivision's 596 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
956
Total Violations
596
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
242
County
Westchester
School/Daycare
No
MCL Violations
0
Monitoring Violations
584
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Endrin MR 12 2010
Methoxychlor MR 12 2010
Dalapon MR 12 2010
Di(2-ethylhexyl) adipate MR 12 2010
OXAMYL MR 12 2010
Simazine MR 12 2010
Di(2-ethylhexyl) phthalate MR 12 2010
Picloram MR 12 2010
Dinoseb MR 12 2010
Aldicarb sulfone MR 12 2010
Carbofuran MR 12 2010
Aldicarb MR 12 2010
LASSO MR 12 2010
Heptachlor epoxide MR 12 2010
2,4-D MR 12 2010
2,4,5-TP MR 12 2010
Benzo(a)pyrene MR 12 2010
Total Polychlorinated Biphenyls (PCB) MR 12 2010
Chlordane MR 12 2010
Toxaphene MR 12 2010
HEXACHLOROBENZENE MR 12 2010
BHC-GAMMA MR 12 2010
Hexachlorocyclopentadiene MR 12 2010
Aldicarb sulfoxide MR 12 2010
Heptachlor MR 12 2010
o-Dichlorobenzene MR 12 2024
p-Dichlorobenzene MR 12 2024
1,1-Dichloroethylene MR 12 2024
1,2-Dichloroethane MR 12 2024
1,1,1-Trichloroethane MR 12 2024

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 Greenbriar Subdivision.

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 NY5918381 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 Greenbriar Subdivision 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
2024 o-Dichlorobenzene MR 12 SDWIS / NY5918381 / 2968
2024 p-Dichlorobenzene MR 12 SDWIS / NY5918381 / 2969
2024 1,1-Dichloroethylene MR 12 SDWIS / NY5918381 / 2977
2024 1,2-Dichloroethane MR 12 SDWIS / NY5918381 / 2980
2024 1,1,1-Trichloroethane MR 12 SDWIS / NY5918381 / 2981
2024 1,2-Dichloropropane MR 12 SDWIS / NY5918381 / 2983
2024 Trichloroethylene MR 12 SDWIS / NY5918381 / 2984
2024 1,1,2-Trichloroethane MR 12 SDWIS / NY5918381 / 2985
2024 Tetrachloroethylene MR 12 SDWIS / NY5918381 / 2987
2024 CHLOROBENZENE MR 12 SDWIS / NY5918381 / 2989
2024 Styrene MR 12 SDWIS / NY5918381 / 2996
2024 DICHLOROMETHANE MR 12 SDWIS / NY5918381 / 2964
2024 Vinyl chloride MR 12 SDWIS / NY5918381 / 2976
2024 trans-1,2-Dichloroethylene MR 12 SDWIS / NY5918381 / 2979
2024 Benzene MR 12 SDWIS / NY5918381 / 2990

How Greenbriar Subdivision Compares

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

Metric Greenbriar Subdivision New York avg Federal benchmark
Total violations 596 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 956 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 Greenbriar Subdivision water safe to drink? ▼
Greenbriar Subdivision (PWS ID: NY5918381) has 596 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 956 people using Groundwater sources.
How many people does Greenbriar Subdivision serve? ▼
Greenbriar Subdivision serves 956 people in Somers, New York. It is a Private-owned system using Groundwater water sources with 242 service connections.
What type of violations does Greenbriar Subdivision have? ▼
Greenbriar Subdivision has 596 total violations: 0 health-based violations (MCL exceedances or treatment failures), 584 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Greenbriar Subdivision water? ▼
No PFAS testing data is available for Greenbriar Subdivision under the EPA's UCMR5 monitoring program.
What water source does Greenbriar Subdivision use? ▼
Greenbriar Subdivision 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.