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WILSONS MHP

PWS ID: NH0753010 · HENNIKER, New Hampshire 03242

WILSONS MHP serves 58 people in HENNIKER, New Hampshire using Groundwater water sources. It has 102 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: WILSONS MHP

WILSONS MHP is a private-owned community water system that delivers drinking water to 58 residents in HENNIKER, New Hampshire (Grafton County) through 23 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 102 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 91 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 4 violations (Other). 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. WILSONS MHP's 102 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
58
Total Violations
102
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
23
County
Grafton
School/Daycare
No
MCL Violations
0
Monitoring Violations
91
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 4 2016
DICHLOROMETHANE MR 4 1994
o-Dichlorobenzene MR 4 1994
p-Dichlorobenzene MR 4 1994
1,1-Dichloroethylene MR 4 1994
1,2-Dichloroethane MR 4 1994
1,1,1-Trichloroethane MR 4 1994
Carbon tetrachloride MR 4 1994
Tetrachloroethylene MR 4 1994
CHLOROBENZENE MR 4 1994
Toluene MR 4 1994
Nitrate MR 4 1994
1,2,4-Trichlorobenzene MR 4 1994
cis-1,2-Dichloroethylene MR 4 1994
Xylenes, Total MR 4 1994
Vinyl chloride MR 4 1994
1,2-Dichloropropane MR 4 1994
Styrene MR 4 1994
trans-1,2-Dichloroethylene MR 4 1994
Trichloroethylene MR 4 1994
Benzene MR 4 1994
Ethylbenzene MR 4 1994
1,1,2-Trichloroethane MR 4 1994
Lead and Copper Rule MR 3 2000

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 WILSONS MHP.

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 NH0753010 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
2016 Consumer Confidence Rule Other 4 SDWIS / NH0753010 / 7000
2000 Lead and Copper Rule MR 3 SDWIS / NH0753010 / 5000
1994 DICHLOROMETHANE MR 4 SDWIS / NH0753010 / 2964
1994 o-Dichlorobenzene MR 4 SDWIS / NH0753010 / 2968
1994 p-Dichlorobenzene MR 4 SDWIS / NH0753010 / 2969
1994 1,1-Dichloroethylene MR 4 SDWIS / NH0753010 / 2977
1994 1,2-Dichloroethane MR 4 SDWIS / NH0753010 / 2980
1994 1,1,1-Trichloroethane MR 4 SDWIS / NH0753010 / 2981
1994 Carbon tetrachloride MR 4 SDWIS / NH0753010 / 2982
1994 Tetrachloroethylene MR 4 SDWIS / NH0753010 / 2987
1994 CHLOROBENZENE MR 4 SDWIS / NH0753010 / 2989
1994 Toluene MR 4 SDWIS / NH0753010 / 2991
1994 Nitrate MR 4 SDWIS / NH0753010 / 1040
1994 1,2,4-Trichlorobenzene MR 4 SDWIS / NH0753010 / 2378
1994 cis-1,2-Dichloroethylene MR 4 SDWIS / NH0753010 / 2380

How WILSONS MHP Compares

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

Metric WILSONS MHP New Hampshire avg Federal benchmark
Total violations 102 63.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 58 506 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 WILSONS MHP water safe to drink? ▼
WILSONS MHP (PWS ID: NH0753010) has 102 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 58 people using Groundwater sources.
How many people does WILSONS MHP serve? ▼
WILSONS MHP serves 58 people in HENNIKER, New Hampshire. It is a Private-owned system using Groundwater water sources with 23 service connections.
What type of violations does WILSONS MHP have? ▼
WILSONS MHP has 102 total violations: 0 health-based violations (MCL exceedances or treatment failures), 91 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in WILSONS MHP water? ▼
No PFAS testing data is available for WILSONS MHP under the EPA's UCMR5 monitoring program.
What water source does WILSONS MHP use? ▼
WILSONS MHP 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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