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Non-Transient Non-Community Water System · PWS MA2125011

Immaculate Heart of Mary School

Still River, Massachusetts 01467 - drinking water served from groundwater sources to 110 people, tracked in EPA SDWIS and UCMR5.

110
People served
470
EPA violations
54
Health-based
Untested
UCMR5 result

The verdict

EPA records 470 drinking-water violations at Immaculate Heart of Mary School, 11% of them health-based - above the Massachusetts per-system average.

470
Total EPA violations on record
11%
Health-based (MCL / treatment failure)
110
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Immaculate Heart of Mary School

Immaculate Heart of Mary School is a private-owned non-transient non-community water system that delivers drinking water to 110 residents in Still River, Massachusetts (Worcester County) through 8 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 470 total violations for this system , of which 54 (11%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 402 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 Coliform (TCR), recorded in 55 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 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%).

Immaculate Heart of Mary School's 470 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
110
Total Violations
470
Health-Based Violations
54
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
8
County
Worcester
School/Daycare
Yes
MCL Violations
54
Monitoring Violations
402
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 55 2014
Coliform (TCR) MCL 39 2014
Arsenic MCL 15 2016
Xylenes, Total MR 13 2014
DICHLOROMETHANE MR 13 2014
trans-1,2-Dichloroethylene MR 13 2014
1,2-Dichloroethane MR 13 2014
Carbon tetrachloride MR 13 2014
1,2-Dichloropropane MR 13 2014
Trichloroethylene MR 13 2014
1,1,2-Trichloroethane MR 13 2014
Tetrachloroethylene MR 13 2014
Benzene MR 13 2014
Styrene MR 13 2014
1,2,4-Trichlorobenzene MR 13 2014
cis-1,2-Dichloroethylene MR 13 2014
p-Dichlorobenzene MR 13 2014
Vinyl chloride MR 13 2014
CHLOROBENZENE MR 13 2014
o-Dichlorobenzene MR 13 2014
Ethylbenzene MR 13 2014
1,1-Dichloroethylene MR 13 2014
Toluene MR 13 2014
1,1,1-Trichloroethane MR 13 2014
Lead and Copper Rule MR 10 2013
Nitrate MR 9 2008
Arsenic MR 5 2015
Chlorine MR 5 2015
Chromium MR 1 2000
CYANIDE MR 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 Immaculate Heart of Mary School.

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 MA2125011 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 Immaculate Heart of Mary School 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
2016 Arsenic MCL 15 SDWIS / MA2125011 / 1005
2015 Arsenic MR 5 SDWIS / MA2125011 / 1005
2015 Chlorine MR 5 SDWIS / MA2125011 / 0999
2014 Coliform (TCR) MR 55 SDWIS / MA2125011 / 3100
2014 Coliform (TCR) MCL 39 SDWIS / MA2125011 / 3100
2014 Xylenes, Total MR 13 SDWIS / MA2125011 / 2955
2014 DICHLOROMETHANE MR 13 SDWIS / MA2125011 / 2964
2014 trans-1,2-Dichloroethylene MR 13 SDWIS / MA2125011 / 2979
2014 1,2-Dichloroethane MR 13 SDWIS / MA2125011 / 2980
2014 Carbon tetrachloride MR 13 SDWIS / MA2125011 / 2982
2014 1,2-Dichloropropane MR 13 SDWIS / MA2125011 / 2983
2014 Trichloroethylene MR 13 SDWIS / MA2125011 / 2984
2014 1,1,2-Trichloroethane MR 13 SDWIS / MA2125011 / 2985
2014 Tetrachloroethylene MR 13 SDWIS / MA2125011 / 2987
2014 Benzene MR 13 SDWIS / MA2125011 / 2990

How Immaculate Heart of Mary School Compares

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

Metric Immaculate Heart of Mary School Massachusetts avg Federal benchmark
Total violations 470 46.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 54 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 110 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 Immaculate Heart of Mary School water safe to drink? ▼
Immaculate Heart of Mary School (PWS ID: MA2125011) has 470 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 110 people using Groundwater sources.
How many people does Immaculate Heart of Mary School serve? ▼
Immaculate Heart of Mary School serves 110 people in Still River, Massachusetts. It is a Private-owned system using Groundwater water sources with 8 service connections.
What type of violations does Immaculate Heart of Mary School have? ▼
Immaculate Heart of Mary School has 470 total violations: 54 health-based violations (MCL exceedances or treatment failures), 402 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Immaculate Heart of Mary School water? ▼
No PFAS testing data is available for Immaculate Heart of Mary School under the EPA's UCMR5 monitoring program.
What water source does Immaculate Heart of Mary School use? ▼
Immaculate Heart of Mary School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.