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OAK HILL

PWS ID: NH0432020 · ATKINSON, New Hampshire 03811

OAK HILL serves 150 people in ATKINSON, New Hampshire using Groundwater water sources. It has 50 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: OAK HILL

OAK HILL is a private-owned community water system that delivers drinking water to 150 residents in ATKINSON, New Hampshire (Rockingham County) through 60 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 50 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 48 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 Arsenic, recorded in 4 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. OAK HILL's 50 violations sit below 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
150
Total Violations
50
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
60
County
Rockingham
School/Daycare
No
MCL Violations
0
Monitoring Violations
48
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MR 4 2002
Consumer Confidence Rule Other 2 2007
Nitrate MR 2 2014
cis-1,2-Dichloroethylene MR 2 2014
Xylenes, Total MR 2 2014
DICHLOROMETHANE MR 2 2014
o-Dichlorobenzene MR 2 2014
1,1-Dichloroethylene MR 2 2014
trans-1,2-Dichloroethylene MR 2 2014
Carbon tetrachloride MR 2 2014
1,2-Dichloropropane MR 2 2014
Trichloroethylene MR 2 2014
Tetrachloroethylene MR 2 2014
CHLOROBENZENE MR 2 2014
Benzene MR 2 2014
Ethylbenzene MR 2 2014
Styrene MR 2 2014
p-Dichlorobenzene MR 2 2014
1,2,4-Trichlorobenzene MR 2 2014
1,1,2-Trichloroethane MR 2 2014
1,1,1-Trichloroethane MR 2 2014
Toluene MR 2 2014
Vinyl chloride MR 2 2014
1,2-Dichloroethane MR 2 2014

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 OAK HILL.

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 NH0432020 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 Nitrate MR 2 SDWIS / NH0432020 / 1040
2014 cis-1,2-Dichloroethylene MR 2 SDWIS / NH0432020 / 2380
2014 Xylenes, Total MR 2 SDWIS / NH0432020 / 2955
2014 DICHLOROMETHANE MR 2 SDWIS / NH0432020 / 2964
2014 o-Dichlorobenzene MR 2 SDWIS / NH0432020 / 2968
2014 1,1-Dichloroethylene MR 2 SDWIS / NH0432020 / 2977
2014 trans-1,2-Dichloroethylene MR 2 SDWIS / NH0432020 / 2979
2014 Carbon tetrachloride MR 2 SDWIS / NH0432020 / 2982
2014 1,2-Dichloropropane MR 2 SDWIS / NH0432020 / 2983
2014 Trichloroethylene MR 2 SDWIS / NH0432020 / 2984
2014 Tetrachloroethylene MR 2 SDWIS / NH0432020 / 2987
2014 CHLOROBENZENE MR 2 SDWIS / NH0432020 / 2989
2014 Benzene MR 2 SDWIS / NH0432020 / 2990
2014 Ethylbenzene MR 2 SDWIS / NH0432020 / 2992
2014 Styrene MR 2 SDWIS / NH0432020 / 2996

How OAK HILL Compares

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

Metric OAK HILL New Hampshire avg Federal benchmark
Total violations 50 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 150 506 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 OAK HILL water safe to drink? ▼
OAK HILL (PWS ID: NH0432020) has 50 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 150 people using Groundwater sources.
How many people does OAK HILL serve? ▼
OAK HILL serves 150 people in ATKINSON, New Hampshire. It is a Private-owned system using Groundwater water sources with 60 service connections.
What type of violations does OAK HILL have? ▼
OAK HILL has 50 total violations: 0 health-based violations (MCL exceedances or treatment failures), 48 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in OAK HILL water? ▼
No PFAS testing data is available for OAK HILL under the EPA's UCMR5 monitoring program.
What water source does OAK HILL use? ▼
OAK HILL 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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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial