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Transient Non-Community Water System · PWS MA2179023

Mendon Twin Drive IN

Allston, Massachusetts 02134 - drinking water served from groundwater sources to 1,600 people, tracked in EPA SDWIS and UCMR5.

1,600
People served
78
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 78 drinking-water violations at Mendon Twin Drive IN, 3% of them health-based - above the Massachusetts per-system average.

78
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
1,600
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mendon Twin Drive IN

Mendon Twin Drive IN is a private-owned transient non-community water system that delivers drinking water to 1,600 residents in Allston, Massachusetts (Worcester County) through 4 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 78 total violations for this system , of which 2 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 74 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 8 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%).

Mendon Twin Drive IN's 78 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
1,600
Total Violations
78
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
4
County
Worcester
School/Daycare
No
MCL Violations
2
Monitoring Violations
74
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 8 2013
Revised Total Coliform Rule MON 4 2018
Endrin MR 2 2012
ETHYLENE DIBROMIDE MR 2 2012
Heptachlor epoxide MR 2 2012
Heptachlor MR 2 2012
Toxaphene MR 2 2012
Methoxychlor MR 2 2012
Total Polychlorinated Biphenyls (PCB) MR 2 2012
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2012
Benzo(a)pyrene MR 2 2012
Dalapon MR 2 2012
Dinoseb MR 2 2012
Diquat MR 2 2012
Endothall MR 2 2012
Glyphosate MR 2 2012
Hexachlorocyclopentadiene MR 2 2012
OXAMYL MR 2 2012
Picloram MR 2 2012
2,3,7,8-TCDD MR 2 2012
Coliform (TCR) MCL 2 2014
LASSO MR 2 2012
Atrazine MR 2 2012
Carbofuran MR 2 2012
HEXACHLOROBENZENE MR 2 2012
Di(2-ethylhexyl) phthalate MR 2 2012
2,4,5-TP MR 2 2012
Pentachlorophenol MR 2 2012
Chlordane MR 2 2012
Nitrate MR 2 2012

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 Mendon Twin Drive IN.

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 MA2179023 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 Mendon Twin Drive IN 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
2018 Revised Total Coliform Rule MON 4 SDWIS / MA2179023 / 8000
2014 Coliform (TCR) MCL 2 SDWIS / MA2179023 / 3100
2013 Coliform (TCR) MR 8 SDWIS / MA2179023 / 3100
2012 Endrin MR 2 SDWIS / MA2179023 / 2005
2012 ETHYLENE DIBROMIDE MR 2 SDWIS / MA2179023 / 2946
2012 Heptachlor epoxide MR 2 SDWIS / MA2179023 / 2067
2012 Heptachlor MR 2 SDWIS / MA2179023 / 2065
2012 Toxaphene MR 2 SDWIS / MA2179023 / 2020
2012 Methoxychlor MR 2 SDWIS / MA2179023 / 2015
2012 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / MA2179023 / 2383
2012 1,2-DIBROMO-3-CHLOROPROPANE MR 2 SDWIS / MA2179023 / 2931
2012 Benzo(a)pyrene MR 2 SDWIS / MA2179023 / 2306
2012 Dalapon MR 2 SDWIS / MA2179023 / 2031
2012 Dinoseb MR 2 SDWIS / MA2179023 / 2041
2012 Diquat MR 2 SDWIS / MA2179023 / 2032

How Mendon Twin Drive IN Compares

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

Metric Mendon Twin Drive IN Massachusetts avg Federal benchmark
Total violations 78 46.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 1,600 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 Mendon Twin Drive IN water safe to drink? ▼
Mendon Twin Drive IN (PWS ID: MA2179023) has 78 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,600 people using Groundwater sources.
How many people does Mendon Twin Drive IN serve? ▼
Mendon Twin Drive IN serves 1,600 people in Allston, Massachusetts. It is a Private-owned system using Groundwater water sources with 4 service connections.
What type of violations does Mendon Twin Drive IN have? ▼
Mendon Twin Drive IN has 78 total violations: 2 health-based violations (MCL exceedances or treatment failures), 74 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mendon Twin Drive IN water? ▼
No PFAS testing data is available for Mendon Twin Drive IN under the EPA's UCMR5 monitoring program.
What water source does Mendon Twin Drive IN use? ▼
Mendon Twin Drive IN uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.