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Community Water System · PWS MA4350003

Mount St Marys Abbey

Wrentham, Massachusetts 02093 - drinking water served from groundwater sources to 60 people, tracked in EPA SDWIS and UCMR5.

60
People served
90
EPA violations
33
Health-based
Untested
UCMR5 result

The verdict

EPA records 90 drinking-water violations at Mount St Marys Abbey, 37% of them health-based - above the Massachusetts per-system average.

90
Total EPA violations on record
37%
Health-based (MCL / treatment failure)
60
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mount St Marys Abbey

Mount St Marys Abbey is a private-owned community water system that delivers drinking water to 60 residents in Wrentham, Massachusetts (Norfolk County) through 7 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 90 total violations for this system , of which 33 (37%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 28 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 Combined Radium (-226 and -228), recorded in 29 violations (MCL, 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 Massachusetts, EPA tracks 1,599 public water systems serving 10,332,845 people, with 73,886 cumulative violations and 7,389 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 46.2 violations. Statewide, 148 of 263 UCMR5-tested systems have reported PFAS detections (56.3%).

Mount St Marys Abbey's 90 violations sit above the Massachusetts 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
60
Total Violations
90
Health-Based Violations
33
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
7
County
Norfolk
School/Daycare
No
MCL Violations
33
Monitoring Violations
28
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 29 2024
Public Notice Other 26 2021
Coliform (TCR) MR 20 2007
Coliform (TCR) MCL 4 2011
53-IODINE-131 MR 1 2005
Radium-228 MR 1 2005
Tritium MR 1 2005
Gross Alpha, Excl. Radon and U MR 1 2005
Gross Beta Particle Activity MR 1 2005
38-STRONTIUM-90 MR 1 2005
Combined Uranium MR 1 2005
Radium-226 MR 1 2005

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 Mount St Marys Abbey.

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 MA4350003 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Massachusetts Drinking Water Authority

MassDEP, Drinking Water Program is the primacy agency that licenses and inspects Mount St Marys Abbey under EPA-delegated authority.

Open MA regulator portal

Source: MassDEP, Drinking Water Program

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 Combined Radium (-226 and -228) MCL 29 SDWIS / MA4350003 / 4010
2021 Public Notice Other 26 SDWIS / MA4350003 / 7500
2011 Coliform (TCR) MCL 4 SDWIS / MA4350003 / 3100
2007 Coliform (TCR) MR 20 SDWIS / MA4350003 / 3100
2005 53-IODINE-131 MR 1 SDWIS / MA4350003 / 4264
2005 Radium-228 MR 1 SDWIS / MA4350003 / 4030
2005 Tritium MR 1 SDWIS / MA4350003 / 4102
2005 Gross Alpha, Excl. Radon and U MR 1 SDWIS / MA4350003 / 4000
2005 Gross Beta Particle Activity MR 1 SDWIS / MA4350003 / 4100
2005 38-STRONTIUM-90 MR 1 SDWIS / MA4350003 / 4174
2005 Combined Uranium MR 1 SDWIS / MA4350003 / 4006
2005 Radium-226 MR 1 SDWIS / MA4350003 / 4020

How Mount St Marys Abbey Compares

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

Metric Mount St Marys Abbey Massachusetts avg Federal benchmark
Total violations 90 46.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 33 4.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 56.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 60 6,462 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,599 regulated public water systems in Massachusetts.

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 Mount St Marys Abbey water safe to drink? ▼
Mount St Marys Abbey (PWS ID: MA4350003) has 90 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 60 people using Groundwater sources.
How many people does Mount St Marys Abbey serve? ▼
Mount St Marys Abbey serves 60 people in Wrentham, Massachusetts. It is a Private-owned system using Groundwater water sources with 7 service connections.
What type of violations does Mount St Marys Abbey have? ▼
Mount St Marys Abbey has 90 total violations: 33 health-based violations (MCL exceedances or treatment failures), 28 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mount St Marys Abbey water? ▼
No PFAS testing data is available for Mount St Marys Abbey under the EPA's UCMR5 monitoring program.
What water source does Mount St Marys Abbey use? ▼
Mount St Marys Abbey 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.