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Community Water System · PWS NY5503377

Marlborough Water District

Milton, New York 12547 - drinking water served from surface water sources to 3,248 people, tracked in EPA SDWIS and UCMR5.

3,248
People served
86
EPA violations
43
Health-based
Untested
UCMR5 result

The verdict

EPA records 86 drinking-water violations at Marlborough Water District, 50% of them health-based - above the New York per-system average.

86
Total EPA violations on record
50%
Health-based (MCL / treatment failure)
3,248
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Marlborough Water District

Marlborough Water District is a local-owned community water system that delivers drinking water to 3,248 residents in Milton, New York (Ulster County) through 1,140 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 86 total violations for this system , of which 43 (50%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 43 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 31 violations (TT, health-based). 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%).

Marlborough Water District's 86 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
3,248
Total Violations
86
Health-Based Violations
43
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,140
County
Ulster
School/Daycare
No
MCL Violations
9
Monitoring Violations
43
Treatment Tech Violations
34

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 31 2000
TTHM MR 14 2023
Total Haloacetic Acids (HAA5) MR 14 2023
Total Haloacetic Acids (HAA5) MCL 9 2009
Lead and Copper Rule MR 8 2008
Coliform (TCR) MR 4 2013
Interim Enhanced Surface Water Treatment Rule TT 3 2011
Surface Water Treatment Rule MR 3 2008

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 Marlborough 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 NY5503377 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 Marlborough 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
2023 TTHM MR 14 SDWIS / NY5503377 / 2950
2023 Total Haloacetic Acids (HAA5) MR 14 SDWIS / NY5503377 / 2456
2013 Coliform (TCR) MR 4 SDWIS / NY5503377 / 3100
2011 Interim Enhanced Surface Water Treatment Rule TT 3 SDWIS / NY5503377 / 0300
2009 Total Haloacetic Acids (HAA5) MCL 9 SDWIS / NY5503377 / 2456
2008 Lead and Copper Rule MR 8 SDWIS / NY5503377 / 5000
2008 Surface Water Treatment Rule MR 3 SDWIS / NY5503377 / 0200
2000 Surface Water Treatment Rule TT 31 SDWIS / NY5503377 / 0200

How Marlborough Water District Compares

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

Metric Marlborough Water District New York avg Federal benchmark
Total violations 86 68.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 43 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 3,248 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 Marlborough Water District water safe to drink? ▼
Marlborough Water District (PWS ID: NY5503377) has 86 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,248 people using Surface Water sources.
How many people does Marlborough Water District serve? ▼
Marlborough Water District serves 3,248 people in Milton, New York. It is a Local-owned system using Surface Water water sources with 1,140 service connections.
What type of violations does Marlborough Water District have? ▼
Marlborough Water District has 86 total violations: 43 health-based violations (MCL exceedances or treatment failures), 43 monitoring/reporting violations, and 34 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Marlborough Water District water? ▼
No PFAS testing data is available for Marlborough Water District under the EPA's UCMR5 monitoring program.
What water source does Marlborough Water District use? ▼
Marlborough Water District 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. 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.