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Community Water System · PWS NH1061010

Hancock Water Works

Hancock, New Hampshire 03449 - drinking water served from surface water sources to 450 people, tracked in EPA SDWIS and UCMR5.

450
People served
141
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 141 drinking-water violations at Hancock Water Works, 3% of them health-based - above the New Hampshire per-system average.

141
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
450
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hancock Water Works

Hancock Water Works is a local-owned community water system that delivers drinking water to 450 residents in Hancock, New Hampshire (Hillsborough County) through 201 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 141 total violations for this system , of which 4 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 121 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Nitrate, recorded in 12 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. Statewide, 23 of 51 UCMR5-tested systems have reported PFAS detections (45.1%).

Hancock Water Works's 141 violations sit above the New Hampshire 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
450
Total Violations
141
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
201
County
Hillsborough
School/Daycare
No
MCL Violations
0
Monitoring Violations
121
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 12 1995
Total Haloacetic Acids (HAA5) MR 4 2018
TTHM MR 4 2018
Surface Water Treatment Rule TT 4 2008
Arsenic MR 3 1995
Cadmium MR 3 1995
CYANIDE MR 3 1995
o-Dichlorobenzene MR 3 1995
Mercury MR 3 1995
Vinyl chloride MR 3 1995
1,1-Dichloroethylene MR 3 1995
trans-1,2-Dichloroethylene MR 3 1995
Antimony, Total MR 3 1995
1,2-Dichloroethane MR 3 1995
1,1,1-Trichloroethane MR 3 1995
Trichloroethylene MR 3 1995
Tetrachloroethylene MR 3 1995
Benzene MR 3 1995
Toluene MR 3 1995
Styrene MR 3 1995
Thallium, Total MR 3 1995
CHLOROBENZENE MR 3 1995
Ethylbenzene MR 3 1995
p-Dichlorobenzene MR 3 1995
DICHLOROMETHANE MR 3 1995
1,2,4-Trichlorobenzene MR 3 1995
1,1,2-Trichloroethane MR 3 1995
1,2-Dichloropropane MR 3 1995
Beryllium, Total MR 3 1995
Selenium MR 3 1995

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 Hancock Water Works.

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 NH1061010 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
2018 Total Haloacetic Acids (HAA5) MR 4 SDWIS / NH1061010 / 2456
2018 TTHM MR 4 SDWIS / NH1061010 / 2950
2012 Lead and Copper Rule MR 2 SDWIS / NH1061010 / 5000
2008 Surface Water Treatment Rule TT 4 SDWIS / NH1061010 / 0200
1995 Nitrate MR 12 SDWIS / NH1061010 / 1040
1995 Arsenic MR 3 SDWIS / NH1061010 / 1005
1995 Cadmium MR 3 SDWIS / NH1061010 / 1015
1995 CYANIDE MR 3 SDWIS / NH1061010 / 1024
1995 o-Dichlorobenzene MR 3 SDWIS / NH1061010 / 2968
1995 Mercury MR 3 SDWIS / NH1061010 / 1035
1995 Vinyl chloride MR 3 SDWIS / NH1061010 / 2976
1995 1,1-Dichloroethylene MR 3 SDWIS / NH1061010 / 2977
1995 trans-1,2-Dichloroethylene MR 3 SDWIS / NH1061010 / 2979
1995 Antimony, Total MR 3 SDWIS / NH1061010 / 1074
1995 1,2-Dichloroethane MR 3 SDWIS / NH1061010 / 2980

How Hancock Water Works Compares

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

Metric Hancock Water Works New Hampshire avg Federal benchmark
Total violations 141 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 450 506 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 (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 Hancock Water Works water safe to drink? ▼
Hancock Water Works (PWS ID: NH1061010) has 141 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 450 people using Surface Water sources.
How many people does Hancock Water Works serve? ▼
Hancock Water Works serves 450 people in Hancock, New Hampshire. It is a Local-owned system using Surface Water water sources with 201 service connections.
What type of violations does Hancock Water Works have? ▼
Hancock Water Works has 141 total violations: 4 health-based violations (MCL exceedances or treatment failures), 121 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hancock Water Works water? ▼
No PFAS testing data is available for Hancock Water Works under the EPA's UCMR5 monitoring program.
What water source does Hancock Water Works use? ▼
Hancock Water Works uses Surface Water 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. 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.