PlainWater
States → New Hampshire

COLONIAL PARK

PWS ID: NH0076130 · LONDONDERRY, New Hampshire 03053

COLONIAL PARK serves 70 people in LONDONDERRY, New Hampshire using Groundwater water sources. It has 342 recorded EPA violations, including 14 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: COLONIAL PARK

COLONIAL PARK is a private-owned non-transient non-community water system that delivers drinking water to 70 residents in LONDONDERRY, New Hampshire (Hillsborough County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 342 total violations for this system , of which 14 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 324 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 Coliform (TCR), recorded in 8 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. COLONIAL PARK's 342 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
70
Total Violations
342
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Hillsborough
School/Daycare
No
MCL Violations
12
Monitoring Violations
324
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 8 2012
Nitrate MR 8 2001
Xylenes, Total MR 8 2001
DICHLOROMETHANE MR 8 2001
Vinyl chloride MR 8 2001
1,1-Dichloroethylene MR 8 2001
1,2-Dichloroethane MR 8 2001
Carbon tetrachloride MR 8 2001
1,2-Dichloropropane MR 8 2001
Trichloroethylene MR 8 2001
Tetrachloroethylene MR 8 2001
Benzene MR 8 2001
Toluene MR 8 2001
Ethylbenzene MR 8 2001
Styrene MR 8 2001
1,2,4-Trichlorobenzene MR 8 2001
o-Dichlorobenzene MR 8 2001
p-Dichlorobenzene MR 8 2001
1,1,2-Trichloroethane MR 8 2001
CHLOROBENZENE MR 8 2001
1,1,1-Trichloroethane MR 8 2001
trans-1,2-Dichloroethylene MR 8 2001
cis-1,2-Dichloroethylene MR 8 2001
Endrin MR 4 2001
Arsenic MR 4 2001
Barium MR 4 2001
Methoxychlor MR 4 2001
Cadmium MR 4 2001
Chromium MR 4 2001
Glyphosate MR 4 2001

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 COLONIAL PARK.

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 NH0076130 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 Revised Total Coliform Rule MON 4 SDWIS / NH0076130 / 8000
2018 Revised Total Coliform Rule RPT 4 SDWIS / NH0076130 / 8000
2018 Revised Total Coliform Rule MCL 4 SDWIS / NH0076130 / 8000
2012 Coliform (TCR) MCL 8 SDWIS / NH0076130 / 3100
2001 Nitrate MR 8 SDWIS / NH0076130 / 1040
2001 Xylenes, Total MR 8 SDWIS / NH0076130 / 2955
2001 DICHLOROMETHANE MR 8 SDWIS / NH0076130 / 2964
2001 Vinyl chloride MR 8 SDWIS / NH0076130 / 2976
2001 1,1-Dichloroethylene MR 8 SDWIS / NH0076130 / 2977
2001 1,2-Dichloroethane MR 8 SDWIS / NH0076130 / 2980
2001 Carbon tetrachloride MR 8 SDWIS / NH0076130 / 2982
2001 1,2-Dichloropropane MR 8 SDWIS / NH0076130 / 2983
2001 Trichloroethylene MR 8 SDWIS / NH0076130 / 2984
2001 Tetrachloroethylene MR 8 SDWIS / NH0076130 / 2987
2001 Benzene MR 8 SDWIS / NH0076130 / 2990

How COLONIAL PARK Compares

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

Metric COLONIAL PARK New Hampshire avg Federal benchmark
Total violations 342 63.6 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 14 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 70 506 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 COLONIAL PARK water safe to drink? ▼
COLONIAL PARK (PWS ID: NH0076130) has 342 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 70 people using Groundwater sources.
How many people does COLONIAL PARK serve? ▼
COLONIAL PARK serves 70 people in LONDONDERRY, New Hampshire. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does COLONIAL PARK have? ▼
COLONIAL PARK has 342 total violations: 14 health-based violations (MCL exceedances or treatment failures), 324 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in COLONIAL PARK water? ▼
No PFAS testing data is available for COLONIAL PARK under the EPA's UCMR5 monitoring program.
What water source does COLONIAL PARK use? ▼
COLONIAL PARK uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.

Explore PlainWater

Water in New Hampshire

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for New Hampshire

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial