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Community Water System · PWS NH1181010

Central Hooksett Water Pct

Hooksett, New Hampshire 03106 - drinking water served from surface water sources to 4,650 people, tracked in EPA SDWIS and UCMR5.

4,650
People served
30
EPA violations
8
Health-based
2 PFAS
UCMR5 result

The verdict

EPA records 30 drinking-water violations at Central Hooksett Water Pct, 27% of them health-based - below the New Hampshire per-system average, and UCMR5 testing detected 2 PFAS compounds.

30
Total EPA violations on record
27%
Health-based (MCL / treatment failure)
4,650
People served by this system
2
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Central Hooksett Water Pct

Central Hooksett Water Pct is a local-owned community water system that delivers drinking water to 4,650 residents in Hooksett, New Hampshire (Merrimack County) through 1,784 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 30 total violations for this system , of which 8 (27%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 20 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 TTHM, recorded in 8 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 28 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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%).

Central Hooksett Water Pct's 30 violations sit below 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.

PFAS Detected

2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
4,650
Total Violations
30
Health-Based Violations
8
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,784
County
Merrimack
School/Daycare
No
MCL Violations
8
Monitoring Violations
20
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 8 2005
Lead and Copper Rule MR 6 2015
Chlorine MR 6 2018
Total Haloacetic Acids (HAA5) MR 4 2004
TTHM MR 4 2004
Consumer Confidence Rule Other 2 2007

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
NEtFOSAA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/14/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 8/14/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/14/2023 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 8/14/2023 <6.00 ppt 6.00 ppt Not Detected
HFPO-DA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/14/2023 <8.00 ppt 8.00 ppt Not Detected
NFDHA 8/14/2023 <20.00 ppt 20.00 ppt Not Detected
PFBA 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFOA 8/14/2023 4.90 ppt 4.00 ppt Detected
PFPeS 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/14/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 8/14/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 5/8/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 5/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 5/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 5/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 5/8/2023 <2.00 ppt 2.00 ppt Not Detected
6:2 FTS 5/8/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 5/8/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 5/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 5/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 5/8/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 5/8/2023 <20.00 ppt 20.00 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 Central Hooksett Water Pct.

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 NH1181010 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 Chlorine MR 6 SDWIS / NH1181010 / 0999
2015 Lead and Copper Rule MR 6 SDWIS / NH1181010 / 5000
2007 Consumer Confidence Rule Other 2 SDWIS / NH1181010 / 7000
2005 TTHM MCL 8 SDWIS / NH1181010 / 2950
2004 Total Haloacetic Acids (HAA5) MR 4 SDWIS / NH1181010 / 2456
2004 TTHM MR 4 SDWIS / NH1181010 / 2950

How Central Hooksett Water Pct Compares

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

Metric Central Hooksett Water Pct New Hampshire avg Federal benchmark
Total violations 30 63.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 12.1 Indicates a contaminant exceeded a federal MCL
PFAS detection 2 compounds 45.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 4,650 506 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 Central Hooksett Water Pct water safe to drink? ▼
Central Hooksett Water Pct (PWS ID: NH1181010) has 30 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 4,650 people using Surface Water sources.
How many people does Central Hooksett Water Pct serve? ▼
Central Hooksett Water Pct serves 4,650 people in Hooksett, New Hampshire. It is a Local-owned system using Surface Water water sources with 1,784 service connections.
What type of violations does Central Hooksett Water Pct have? ▼
Central Hooksett Water Pct has 30 total violations: 8 health-based violations (MCL exceedances or treatment failures), 20 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Central Hooksett Water Pct water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in Central Hooksett Water Pct's water supply: PFOA, PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Central Hooksett Water Pct use? ▼
Central Hooksett Water Pct 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.