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MASCOMA VALLEY COOP

PWS ID: NH0353020 · CONCORD, New Hampshire 03301

MASCOMA VALLEY COOP serves 73 people in CONCORD, New Hampshire using Groundwater water sources. It has 73 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: MASCOMA VALLEY COOP

MASCOMA VALLEY COOP is a private-owned community water system that delivers drinking water to 73 residents in CONCORD, New Hampshire (Grafton County) through 29 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 73 total violations for this system , of which 4 (5%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 64 monitoring and reporting violations are on file. The most recent violation on record dates to 2008.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 14 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 New Hampshire, EPA tracks 2,453 public water systems serving 1,242,123 people, with 155,970 cumulative violations and 29,649 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 63.6 violations. MASCOMA VALLEY COOP's 73 violations sit above the New Hampshire average. Statewide, 23 of 51 UCMR5-tested systems have reported PFAS detections (45.1%). 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
73
Total Violations
73
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
29
County
Grafton
School/Daycare
No
MCL Violations
4
Monitoring Violations
64
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 14 2005
Gross Alpha, Excl. Radon and U MR 4 1998
Combined Radium (-226 and -228) MR 4 1998
Coliform (TCR) MCL 4 1999
Public Notice Other 3 2006
cis-1,2-Dichloroethylene MR 2 1998
DICHLOROMETHANE MR 2 1998
o-Dichlorobenzene MR 2 1998
p-Dichlorobenzene MR 2 1998
Vinyl chloride MR 2 1998
Carbon tetrachloride MR 2 1998
Trichloroethylene MR 2 1998
Ethylbenzene MR 2 1998
Styrene MR 2 1998
1,2-Dichloropropane MR 2 1998
Benzene MR 2 1998
1,1-Dichloroethylene MR 2 1998
1,1,2-Trichloroethane MR 2 1998
Toluene MR 2 1998
Consumer Confidence Rule Other 2 2008
Xylenes, Total MR 2 1998
1,2,4-Trichlorobenzene MR 2 1998
1,1,1-Trichloroethane MR 2 1998
1,2-Dichloroethane MR 2 1998
trans-1,2-Dichloroethylene MR 2 1998
CHLOROBENZENE MR 2 1998
Tetrachloroethylene MR 2 1998

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 MASCOMA VALLEY COOP.

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 NH0353020 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New Hampshire Drinking Water Authority

New Hampshire's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find NH regulator via EPA SDWIS

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
2008 Consumer Confidence Rule Other 2 SDWIS / NH0353020 / 7000
2006 Public Notice Other 3 SDWIS / NH0353020 / 7500
2005 Coliform (TCR) MR 14 SDWIS / NH0353020 / 3100
1999 Coliform (TCR) MCL 4 SDWIS / NH0353020 / 3100
1998 Gross Alpha, Excl. Radon and U MR 4 SDWIS / NH0353020 / 4000
1998 Combined Radium (-226 and -228) MR 4 SDWIS / NH0353020 / 4010
1998 cis-1,2-Dichloroethylene MR 2 SDWIS / NH0353020 / 2380
1998 DICHLOROMETHANE MR 2 SDWIS / NH0353020 / 2964
1998 o-Dichlorobenzene MR 2 SDWIS / NH0353020 / 2968
1998 p-Dichlorobenzene MR 2 SDWIS / NH0353020 / 2969
1998 Vinyl chloride MR 2 SDWIS / NH0353020 / 2976
1998 Carbon tetrachloride MR 2 SDWIS / NH0353020 / 2982
1998 Trichloroethylene MR 2 SDWIS / NH0353020 / 2984
1998 Ethylbenzene MR 2 SDWIS / NH0353020 / 2992
1998 Styrene MR 2 SDWIS / NH0353020 / 2996

How MASCOMA VALLEY COOP Compares

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

Metric MASCOMA VALLEY COOP New Hampshire avg Federal benchmark
Total violations 73 63.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 4 12.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 45.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 73 506 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,453 regulated public water systems in New Hampshire.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is MASCOMA VALLEY COOP water safe to drink? ▼
MASCOMA VALLEY COOP (PWS ID: NH0353020) has 73 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 73 people using Groundwater sources.
How many people does MASCOMA VALLEY COOP serve? ▼
MASCOMA VALLEY COOP serves 73 people in CONCORD, New Hampshire. It is a Private-owned system using Groundwater water sources with 29 service connections.
What type of violations does MASCOMA VALLEY COOP have? ▼
MASCOMA VALLEY COOP has 73 total violations: 4 health-based violations (MCL exceedances or treatment failures), 64 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in MASCOMA VALLEY COOP water? ▼
No PFAS testing data is available for MASCOMA VALLEY COOP under the EPA's UCMR5 monitoring program.
What water source does MASCOMA VALLEY COOP use? ▼
MASCOMA VALLEY COOP 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.

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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.

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