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Community Water System · PWS NH0461010

Claremont Water Dept

Claremont, New Hampshire 03743 - drinking water served from surface water sources to 9,000 people, tracked in EPA SDWIS and UCMR5.

9,000
People served
98
EPA violations
22
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 98 drinking-water violations at Claremont Water Dept, 22% of them health-based - above the New Hampshire per-system average.

98
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
9,000
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Claremont Water Dept

Claremont Water Dept is a local-owned community water system that delivers drinking water to 9,000 residents in Claremont, New Hampshire (Sullivan County) through 3,600 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 98 total violations for this system , of which 22 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 74 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 16 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Claremont Water Dept's 98 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
9,000
Total Violations
98
Health-Based Violations
22
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,600
County
Sullivan
School/Daycare
No
MCL Violations
16
Monitoring Violations
74
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 16 2014
Nitrate MR 8 1994
Interim Enhanced Surface Water Treatment Rule TT 4 2025
Public Notice Other 2 2009
Barium MR 2 1994
Cadmium MR 2 1994
Xylenes, Total MR 2 1994
Chromium MR 2 1994
DICHLOROMETHANE MR 2 1994
o-Dichlorobenzene MR 2 1994
p-Dichlorobenzene MR 2 1994
Nickel MR 2 1994
Selenium MR 2 1994
trans-1,2-Dichloroethylene MR 2 1994
Beryllium, Total MR 2 1994
1,1,1-Trichloroethane MR 2 1994
Thallium, Total MR 2 1994
Carbon tetrachloride MR 2 1994
1,1,2-Trichloroethane MR 2 1994
Tetrachloroethylene MR 2 1994
CHLOROBENZENE MR 2 1994
Benzene MR 2 1994
Toluene MR 2 1994
Ethylbenzene MR 2 1994
Styrene MR 2 1994
Surface Water Treatment Rule TT 2 1997
1,2,4-Trichlorobenzene MR 2 1994
Vinyl chloride MR 2 1994
1,2-Dichloroethane MR 2 1994
CYANIDE MR 2 1994

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 7/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFBS 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 7/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 7/18/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/18/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 7/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFBA 7/18/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/18/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 7/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/18/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 7/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 7/18/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/18/2023 <2.00 ppt 2.00 ppt Not Detected
PFTA 7/18/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/18/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 7/18/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 7/18/2023 <6.00 ppt 6.00 ppt Not Detected
PFOA 7/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFUnA 4/11/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/11/2023 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 4/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFNA 4/11/2023 <4.00 ppt 4.00 ppt Not Detected
HFPO-DA 4/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxS 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 4/11/2023 <8.00 ppt 8.00 ppt Not Detected
PFOS 4/11/2023 <4.00 ppt 4.00 ppt Not Detected
PFTrDA 4/11/2023 <7.00 ppt 7.00 ppt Not Detected
ADONA 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 4/11/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 4/11/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/11/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 4/11/2023 <4.00 ppt 4.00 ppt Not Detected

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 Claremont 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 NH0461010 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
2025 Interim Enhanced Surface Water Treatment Rule TT 4 SDWIS / NH0461010 / 0300
2014 Coliform (TCR) MCL 16 SDWIS / NH0461010 / 3100
2009 Public Notice Other 2 SDWIS / NH0461010 / 7500
1997 Surface Water Treatment Rule TT 2 SDWIS / NH0461010 / 0200
1994 Nitrate MR 8 SDWIS / NH0461010 / 1040
1994 Barium MR 2 SDWIS / NH0461010 / 1010
1994 Cadmium MR 2 SDWIS / NH0461010 / 1015
1994 Xylenes, Total MR 2 SDWIS / NH0461010 / 2955
1994 Chromium MR 2 SDWIS / NH0461010 / 1020
1994 DICHLOROMETHANE MR 2 SDWIS / NH0461010 / 2964
1994 o-Dichlorobenzene MR 2 SDWIS / NH0461010 / 2968
1994 p-Dichlorobenzene MR 2 SDWIS / NH0461010 / 2969
1994 Nickel MR 2 SDWIS / NH0461010 / 1036
1994 Selenium MR 2 SDWIS / NH0461010 / 1045
1994 trans-1,2-Dichloroethylene MR 2 SDWIS / NH0461010 / 2979

How Claremont Water Dept Compares

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

Metric Claremont Water Dept New Hampshire avg Federal benchmark
Total violations 98 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 22 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 9,000 506 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 Claremont Water Dept water safe to drink? ▼
Claremont Water Dept (PWS ID: NH0461010) has 98 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 9,000 people using Surface Water sources.
How many people does Claremont Water Dept serve? ▼
Claremont Water Dept serves 9,000 people in Claremont, New Hampshire. It is a Local-owned system using Surface Water water sources with 3,600 service connections.
What type of violations does Claremont Water Dept have? ▼
Claremont Water Dept has 98 total violations: 22 health-based violations (MCL exceedances or treatment failures), 74 monitoring/reporting violations, and 6 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Claremont Water Dept water? ▼
No. Claremont Water Dept was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Claremont Water Dept use? ▼
Claremont Water Dept 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.