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Community Water System · PWS MA2174000

Maynard Dpw, Water Division

Maynard, Massachusetts 01754 - drinking water served from groundwater sources to 10,401 people, tracked in EPA SDWIS and UCMR5.

10,401
People served
304
EPA violations
16
Health-based
5 PFAS
UCMR5 result

The verdict

EPA records 304 drinking-water violations at Maynard Dpw, Water Division, 5% of them health-based - above the Massachusetts per-system average, and UCMR5 testing detected 5 PFAS compounds.

304
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
10,401
People served by this system
5
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Maynard Dpw, Water Division

Maynard Dpw, Water Division is a local-owned community water system that delivers drinking water to 10,401 residents in Maynard, Massachusetts (Middlesex County) through 3,906 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 304 total violations for this system , of which 16 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 267 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 Lead and Copper Rule, recorded in 17 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 5 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 7.1 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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%).

Maynard Dpw, Water Division's 304 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.

PFAS Detected

5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
10,401
Total Violations
304
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,906
County
Middlesex
School/Daycare
No
MCL Violations
16
Monitoring Violations
267
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 17 2024
TTHM MCL 9 2016
Coliform (TCR) MCL 7 1999
Methoxychlor MR 5 1998
Dalapon MR 5 1998
Endothall MR 5 1998
Glyphosate MR 5 1998
Simazine MR 5 1998
Aldicarb sulfoxide MR 5 1998
Carbofuran MR 5 1998
2,3,7,8-TCDD MR 5 1998
Heptachlor MR 5 1998
HEXACHLOROBENZENE MR 5 1998
Benzo(a)pyrene MR 5 1998
Total Polychlorinated Biphenyls (PCB) MR 5 1998
ETHYLENE DIBROMIDE MR 5 1998
Chlordane MR 5 1998
BHC-GAMMA MR 5 1998
Toxaphene MR 5 1998
Diquat MR 5 1998
Di(2-ethylhexyl) adipate MR 5 1998
OXAMYL MR 5 1998
Picloram MR 5 1998
Dinoseb MR 5 1998
Hexachlorocyclopentadiene MR 5 1998
Aldicarb sulfone MR 5 1998
Aldicarb MR 5 1998
LASSO MR 5 1998
2,4-D MR 5 1998
2,4,5-TP MR 5 1998

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 174 samples detected PFAS.

Contaminant Date Result MRL Status
PFHpS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 6/3/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 6/3/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 6/3/2024 <8.00 ppt 8.00 ppt Not Detected
PFNA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeS 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/3/2024 4.80 ppt 4.00 ppt Detected
PFDoA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/3/2024 3.70 ppt 3.00 ppt Detected
PFUnA 6/3/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 6/3/2024 <2.00 ppt 2.00 ppt Not Detected
PFMBA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
ADONA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/3/2024 <20.00 ppt 20.00 ppt Not Detected
PFEESA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 6/3/2024 3.70 ppt 3.00 ppt Detected
PFMPA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFEESA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/3/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/3/2024 <7.00 ppt 7.00 ppt Not Detected
PFPeA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFTA 6/3/2024 <8.00 ppt 8.00 ppt Not Detected
PFHxS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/3/2024 <5.00 ppt 5.00 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 Maynard Dpw, Water Division.

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 MA2174000 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 Maynard Dpw, Water Division 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 Lead and Copper Rule MR 17 SDWIS / MA2174000 / 5000
2016 TTHM MCL 9 SDWIS / MA2174000 / 2950
2014 Total Haloacetic Acids (HAA5) MR 2 SDWIS / MA2174000 / 2456
2007 Beryllium, Total MR 3 SDWIS / MA2174000 / 1075
2007 Nickel MR 3 SDWIS / MA2174000 / 1036
2007 Thallium, Total MR 3 SDWIS / MA2174000 / 1085
2007 CYANIDE MR 3 SDWIS / MA2174000 / 1024
2007 Arsenic MR 3 SDWIS / MA2174000 / 1005
2007 Mercury MR 3 SDWIS / MA2174000 / 1035
2007 Barium MR 3 SDWIS / MA2174000 / 1010
2007 Cadmium MR 3 SDWIS / MA2174000 / 1015
2007 Selenium MR 3 SDWIS / MA2174000 / 1045
2007 Antimony, Total MR 3 SDWIS / MA2174000 / 1074
2007 Chromium MR 3 SDWIS / MA2174000 / 1020
2007 Fluoride MR 3 SDWIS / MA2174000 / 1025

How Maynard Dpw, Water Division Compares

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

Metric Maynard Dpw, Water Division Massachusetts avg Federal benchmark
Total violations 304 46.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 16 4.6 Indicates a contaminant exceeded a federal MCL
PFAS detection 5 compounds 56.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 10,401 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 Maynard Dpw, Water Division water safe to drink?
Maynard Dpw, Water Division (PWS ID: MA2174000) has 304 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 5 PFAS compounds found. This system serves 10,401 people using Groundwater sources.
How many people does Maynard Dpw, Water Division serve?
Maynard Dpw, Water Division serves 10,401 people in Maynard, Massachusetts. It is a Local-owned system using Groundwater water sources with 3,906 service connections.
What type of violations does Maynard Dpw, Water Division have?
Maynard Dpw, Water Division has 304 total violations: 16 health-based violations (MCL exceedances or treatment failures), 267 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Maynard Dpw, Water Division water?
Yes. UCMR5 testing detected 5 PFAS compounds in Maynard Dpw, Water Division's water supply: PFOA, PFHxA, PFPeA, PFOS, PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Maynard Dpw, Water Division use?
Maynard Dpw, Water Division 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. 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.