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Community Water System · PWS NY3511338

U.s.m.a. - Stoney Lonesome Sys

Fort Montgomery, New York 10922 - drinking water served from surface water sources to 4,000 people, tracked in EPA SDWIS and UCMR5.

4,000
People served
19
EPA violations
12
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 19 drinking-water violations at U.s.m.a. - Stoney Lonesome Sys, 63% of them health-based - below the New York per-system average.

19
Total EPA violations on record
63%
Health-based (MCL / treatment failure)
4,000
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: U.s.m.a. - Stoney Lonesome Sys

U.s.m.a. - Stoney Lonesome Sys is a federal-owned community water system that delivers drinking water to 4,000 residents in Fort Montgomery, New York (Orange County) through 318 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 19 total violations for this system , of which 12 (63%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is TTHM, recorded in 8 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

U.s.m.a. - Stoney Lonesome Sys's 19 violations sit below 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
4,000
Total Violations
19
Health-Based Violations
12
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Federal
Connections
318
County
Orange
School/Daycare
No
MCL Violations
12
Monitoring Violations
1
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 8 2016
Coliform (TCR) MCL 4 2012
Lead and Copper Rule MR 1 2008
Consumer Confidence Rule Other 1 2000

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 87 samples detected PFAS.

Contaminant Date Result MRL Status
PFHxS 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 9/17/2025 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/17/2025 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/17/2025 <5.00 ppt 5.00 ppt Not Detected
PFTA 9/17/2025 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/17/2025 <7.00 ppt 7.00 ppt Not Detected
PFPeS 9/17/2025 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 9/17/2025 <6.00 ppt 6.00 ppt Not Detected
NFDHA 9/17/2025 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFHxA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFDA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/17/2025 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 9/17/2025 <5.00 ppt 5.00 ppt Not Detected
ADONA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 9/17/2025 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/17/2025 <5.00 ppt 5.00 ppt Not Detected
PFUnA 9/17/2025 <2.00 ppt 2.00 ppt Not Detected
PFBS 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpS 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFOS 9/17/2025 <4.00 ppt 4.00 ppt Not Detected
PFNA 9/17/2025 <4.00 ppt 4.00 ppt Not Detected
PFHpA 9/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFMPA 9/17/2025 <4.00 ppt 4.00 ppt Not Detected
PFOA 9/17/2025 <4.00 ppt 4.00 ppt Not Detected
PFHxA 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/17/2025 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/17/2025 <5.00 ppt 5.00 ppt Not Detected
ADONA 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/17/2025 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/17/2025 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 6/17/2025 <5.00 ppt 5.00 ppt Not Detected
PFDoA 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/17/2025 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/17/2025 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeS 6/17/2025 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 6/17/2025 <5.00 ppt 5.00 ppt Not Detected
PFHpS 6/17/2025 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/17/2025 <7.00 ppt 7.00 ppt Not Detected
PFTA 6/17/2025 <8.00 ppt 8.00 ppt Not Detected
NMeFOSAA 6/17/2025 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 6/17/2025 <5.00 ppt 5.00 ppt Not Detected
PFDA 6/17/2025 <3.00 ppt 3.00 ppt 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 U.s.m.a. - Stoney Lonesome Sys.

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 NY3511338 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 U.s.m.a. - Stoney Lonesome Sys 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
2016 TTHM MCL 8 SDWIS / NY3511338 / 2950
2012 Coliform (TCR) MCL 4 SDWIS / NY3511338 / 3100
2008 Lead and Copper Rule MR 1 SDWIS / NY3511338 / 5000
2000 Consumer Confidence Rule Other 1 SDWIS / NY3511338 / 7000

How U.s.m.a. - Stoney Lonesome Sys Compares

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

Metric U.s.m.a. - Stoney Lonesome Sys New York avg Federal benchmark
Total violations 19 68.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 12 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 4,000 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 U.s.m.a. - Stoney Lonesome Sys water safe to drink?
U.s.m.a. - Stoney Lonesome Sys (PWS ID: NY3511338) has 19 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 4,000 people using Surface Water sources.
How many people does U.s.m.a. - Stoney Lonesome Sys serve?
U.s.m.a. - Stoney Lonesome Sys serves 4,000 people in Fort Montgomery, New York. It is a Federal-owned system using Surface Water water sources with 318 service connections.
What type of violations does U.s.m.a. - Stoney Lonesome Sys have?
U.s.m.a. - Stoney Lonesome Sys has 19 total violations: 12 health-based violations (MCL exceedances or treatment failures), 1 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in U.s.m.a. - Stoney Lonesome Sys water?
No. U.s.m.a. - Stoney Lonesome Sys was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does U.s.m.a. - Stoney Lonesome Sys use?
U.s.m.a. - Stoney Lonesome Sys 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.
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.
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.