PlainWater
States → New Hampshire

Community Water System · PWS NH2401010

Walpole Water Dept

Walpole, New Hampshire 03608 - drinking water served from groundwater sources to 1,057 people, tracked in EPA SDWIS and UCMR5.

1,057
People served
539
EPA violations
15
Health-based
Untested
UCMR5 result

The verdict

EPA records 539 drinking-water violations at Walpole Water Dept, 3% of them health-based - above the New Hampshire per-system average.

539
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
1,057
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Walpole Water Dept

Walpole Water Dept is a local-owned community water system that delivers drinking water to 1,057 residents in Walpole, New Hampshire (Cheshire County) through 428 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 539 total violations for this system , of which 15 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 512 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 15 violations (MCL, health-based). 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%).

Walpole Water Dept's 539 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
1,057
Total Violations
539
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
428
County
Cheshire
School/Daycare
No
MCL Violations
15
Monitoring Violations
512
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 15 1991
cis-1,2-Dichloroethylene MR 15 1995
DICHLOROMETHANE MR 15 1995
o-Dichlorobenzene MR 15 1995
Vinyl chloride MR 15 1995
1,1-Dichloroethylene MR 15 1995
trans-1,2-Dichloroethylene MR 15 1995
1,1,1-Trichloroethane MR 15 1995
1,2-Dichloropropane MR 15 1995
Trichloroethylene MR 15 1995
1,1,2-Trichloroethane MR 15 1995
Tetrachloroethylene MR 15 1995
Benzene MR 15 1995
Toluene MR 15 1995
Ethylbenzene MR 15 1995
1,2,4-Trichlorobenzene MR 15 1995
Xylenes, Total MR 15 1995
1,2-Dichloroethane MR 15 1995
Carbon tetrachloride MR 15 1995
Styrene MR 15 1995
Nitrate MR 15 1995
p-Dichlorobenzene MR 15 1995
CHLOROBENZENE MR 15 1995
Coliform (TCR) MR 9 2014
Barium MR 5 1995
Cadmium MR 5 1995
Chromium MR 5 1995
Fluoride MR 5 1995
Antimony, Total MR 5 1995
Beryllium, Total MR 5 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 Walpole Water Dept.

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 NH2401010 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
2014 Coliform (TCR) MR 9 SDWIS / NH2401010 / 3100
2010 Consumer Confidence Rule Other 2 SDWIS / NH2401010 / 7000
2008 Public Notice Other 2 SDWIS / NH2401010 / 7500
2008 Chlorine MR 2 SDWIS / NH2401010 / 0999
1997 Endrin MR 4 SDWIS / NH2401010 / 2005
1997 Methoxychlor MR 4 SDWIS / NH2401010 / 2015
1997 Di(2-ethylhexyl) adipate MR 4 SDWIS / NH2401010 / 2035
1997 OXAMYL MR 4 SDWIS / NH2401010 / 2036
1997 Simazine MR 4 SDWIS / NH2401010 / 2037
1997 Di(2-ethylhexyl) phthalate MR 4 SDWIS / NH2401010 / 2039
1997 Picloram MR 4 SDWIS / NH2401010 / 2040
1997 Hexachlorocyclopentadiene MR 4 SDWIS / NH2401010 / 2042
1997 Carbofuran MR 4 SDWIS / NH2401010 / 2046
1997 LASSO MR 4 SDWIS / NH2401010 / 2051
1997 Heptachlor epoxide MR 4 SDWIS / NH2401010 / 2067

How Walpole Water Dept Compares

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

Metric Walpole Water Dept New Hampshire avg Federal benchmark
Total violations 539 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 15 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 1,057 506 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 Walpole Water Dept water safe to drink? ▼
Walpole Water Dept (PWS ID: NH2401010) has 539 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,057 people using Groundwater sources.
How many people does Walpole Water Dept serve? ▼
Walpole Water Dept serves 1,057 people in Walpole, New Hampshire. It is a Local-owned system using Groundwater water sources with 428 service connections.
What type of violations does Walpole Water Dept have? ▼
Walpole Water Dept has 539 total violations: 15 health-based violations (MCL exceedances or treatment failures), 512 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Walpole Water Dept water? ▼
No PFAS testing data is available for Walpole Water Dept under the EPA's UCMR5 monitoring program.
What water source does Walpole Water Dept use? ▼
Walpole Water Dept 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.
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.