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WESCO UTILITIES

PWS ID: NH1182050 · NASHUA, New Hampshire 03064

WESCO UTILITIES serves 200 people in NASHUA, New Hampshire using Groundwater water sources. It has 248 recorded EPA violations, including 6 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: WESCO UTILITIES

WESCO UTILITIES is a private-owned community water system that delivers drinking water to 200 residents in NASHUA, New Hampshire (Merrimack County) through 80 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 248 total violations for this system , of which 6 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 240 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is Nitrate, 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. WESCO UTILITIES's 248 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
200
Total Violations
248
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
80
County
Merrimack
School/Daycare
No
MCL Violations
4
Monitoring Violations
240
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 14 1999
Coliform (TCR) MR 10 2000
1,2,4-Trichlorobenzene MR 10 1995
cis-1,2-Dichloroethylene MR 10 1995
Xylenes, Total MR 10 1995
DICHLOROMETHANE MR 10 1995
1,2-Dichloroethane MR 10 1995
1,2-Dichloropropane MR 10 1995
Trichloroethylene MR 10 1995
Toluene MR 10 1995
Ethylbenzene MR 10 1995
p-Dichlorobenzene MR 10 1995
Vinyl chloride MR 10 1995
1,1-Dichloroethylene MR 10 1995
trans-1,2-Dichloroethylene MR 10 1995
Carbon tetrachloride MR 10 1995
CHLOROBENZENE MR 10 1995
1,1,2-Trichloroethane MR 10 1995
Styrene MR 10 1995
Tetrachloroethylene MR 10 1995
1,1,1-Trichloroethane MR 10 1995
o-Dichlorobenzene MR 10 1995
Benzene MR 10 1995
Lead and Copper Rule MR 4 2010
Coliform (TCR) MCL 4 2010
Chlorine MR 2 2010
Consumer Confidence Rule Other 2 1999
Lead and Copper Rule TT 2 1994

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 WESCO UTILITIES.

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 NH1182050 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
2010 Lead and Copper Rule MR 4 SDWIS / NH1182050 / 5000
2010 Coliform (TCR) MCL 4 SDWIS / NH1182050 / 3100
2010 Chlorine MR 2 SDWIS / NH1182050 / 0999
2000 Coliform (TCR) MR 10 SDWIS / NH1182050 / 3100
1999 Nitrate MR 14 SDWIS / NH1182050 / 1040
1999 Consumer Confidence Rule Other 2 SDWIS / NH1182050 / 7000
1995 1,2,4-Trichlorobenzene MR 10 SDWIS / NH1182050 / 2378
1995 cis-1,2-Dichloroethylene MR 10 SDWIS / NH1182050 / 2380
1995 Xylenes, Total MR 10 SDWIS / NH1182050 / 2955
1995 DICHLOROMETHANE MR 10 SDWIS / NH1182050 / 2964
1995 1,2-Dichloroethane MR 10 SDWIS / NH1182050 / 2980
1995 1,2-Dichloropropane MR 10 SDWIS / NH1182050 / 2983
1995 Trichloroethylene MR 10 SDWIS / NH1182050 / 2984
1995 Toluene MR 10 SDWIS / NH1182050 / 2991
1995 Ethylbenzene MR 10 SDWIS / NH1182050 / 2992

How WESCO UTILITIES Compares

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

Metric WESCO UTILITIES New Hampshire avg Federal benchmark
Total violations 248 63.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 6 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 200 506 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 WESCO UTILITIES water safe to drink? ▼
WESCO UTILITIES (PWS ID: NH1182050) has 248 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 200 people using Groundwater sources.
How many people does WESCO UTILITIES serve? ▼
WESCO UTILITIES serves 200 people in NASHUA, New Hampshire. It is a Private-owned system using Groundwater water sources with 80 service connections.
What type of violations does WESCO UTILITIES have? ▼
WESCO UTILITIES has 248 total violations: 6 health-based violations (MCL exceedances or treatment failures), 240 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WESCO UTILITIES water? ▼
No PFAS testing data is available for WESCO UTILITIES under the EPA's UCMR5 monitoring program.
What water source does WESCO UTILITIES use? ▼
WESCO UTILITIES 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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