PlainWater
States → Massachusetts

Non-Transient Non-Community Water System · PWS MA2037025

Cosgrove Realty

Harvard, Massachusetts 01451 - drinking water served from groundwater sources to 30 people, tracked in EPA SDWIS and UCMR5.

30
People served
156
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 156 drinking-water violations at Cosgrove Realty - above the Massachusetts per-system average.

156
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
30
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cosgrove Realty

Cosgrove Realty is a private-owned non-transient non-community water system that delivers drinking water to 30 residents in Harvard, Massachusetts (Middlesex County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 156 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 153 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 6 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, 143 of 263 UCMR5-tested systems have reported PFAS detections (54.4%).

Cosgrove Realty's 156 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
30
Total Violations
156
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
2
County
Middlesex
School/Daycare
No
MCL Violations
0
Monitoring Violations
153
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 6 2017
Xylenes, Total MR 4 2003
o-Dichlorobenzene MR 4 2003
p-Dichlorobenzene MR 4 2003
Vinyl chloride MR 4 2003
1,1-Dichloroethylene MR 4 2003
1,2-Dichloroethane MR 4 2003
1,1,1-Trichloroethane MR 4 2003
1,2-Dichloropropane MR 4 2003
Tetrachloroethylene MR 4 2003
CHLOROBENZENE MR 4 2003
Benzene MR 4 2003
Toluene MR 4 2003
Ethylbenzene MR 4 2003
1,2,4-Trichlorobenzene MR 4 2003
Carbon tetrachloride MR 4 2003
Trichloroethylene MR 4 2003
Styrene MR 4 2003
DICHLOROMETHANE MR 4 2003
1,1,2-Trichloroethane MR 4 2003
cis-1,2-Dichloroethylene MR 4 2003
trans-1,2-Dichloroethylene MR 4 2003
Endrin MR 2 2003
Methoxychlor MR 2 2003
Dalapon MR 2 2003
Diquat MR 2 2003
Endothall MR 2 2003
Glyphosate MR 2 2003
Di(2-ethylhexyl) adipate MR 2 2003
OXAMYL MR 2 2003

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 Cosgrove Realty.

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 MA2037025 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 Cosgrove Realty 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
2017 Lead and Copper Rule MR 6 SDWIS / MA2037025 / 5000
2003 Xylenes, Total MR 4 SDWIS / MA2037025 / 2955
2003 o-Dichlorobenzene MR 4 SDWIS / MA2037025 / 2968
2003 p-Dichlorobenzene MR 4 SDWIS / MA2037025 / 2969
2003 Vinyl chloride MR 4 SDWIS / MA2037025 / 2976
2003 1,1-Dichloroethylene MR 4 SDWIS / MA2037025 / 2977
2003 1,2-Dichloroethane MR 4 SDWIS / MA2037025 / 2980
2003 1,1,1-Trichloroethane MR 4 SDWIS / MA2037025 / 2981
2003 1,2-Dichloropropane MR 4 SDWIS / MA2037025 / 2983
2003 Tetrachloroethylene MR 4 SDWIS / MA2037025 / 2987
2003 CHLOROBENZENE MR 4 SDWIS / MA2037025 / 2989
2003 Benzene MR 4 SDWIS / MA2037025 / 2990
2003 Toluene MR 4 SDWIS / MA2037025 / 2991
2003 Ethylbenzene MR 4 SDWIS / MA2037025 / 2992
2003 1,2,4-Trichlorobenzene MR 4 SDWIS / MA2037025 / 2378

How Cosgrove Realty Compares

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

Metric Cosgrove Realty Massachusetts avg Federal benchmark
Total violations 156 46.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 4.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 54.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 30 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 Cosgrove Realty water safe to drink? ▼
Cosgrove Realty (PWS ID: MA2037025) has 156 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 30 people using Groundwater sources.
How many people does Cosgrove Realty serve? ▼
Cosgrove Realty serves 30 people in Harvard, Massachusetts. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does Cosgrove Realty have? ▼
Cosgrove Realty has 156 total violations: 0 health-based violations (MCL exceedances or treatment failures), 153 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cosgrove Realty water? ▼
No PFAS testing data is available for Cosgrove Realty under the EPA's UCMR5 monitoring program.
What water source does Cosgrove Realty use? ▼
Cosgrove Realty 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.