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Merrimack, NH Tap Water Quality 2026

Water quality report for Merrimack, NH — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Merrimack's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Merrimack Village Dist PWSID: NH1531010 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. No PFAS was detected.

A

Merrimack earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected
PFAS tested, none detected
26 violations since 2015, 0 health-based
No violations currently open
Merrimack's lead level vs. all New Hampshire community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of New Hampshire utilities
Population Served
24691
~7047 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
26 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2021 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2021 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2021 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2021 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2021 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2021 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2021 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2021 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2021 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2021 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2021 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2021 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2021 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2021 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2021 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2017–2018 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

26 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Merrimack Village Dist
PWSID NH1531010
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 24,691
Service connections 7,047
Systems serving this area 7
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Merrimack tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Merrimack water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Merrimack? ▼
Merrimack Village Dist (PWSID NH1531010), one of 7 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-02-24. No significant deficiencies were recorded.

What Should Merrimack Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in New Hampshire

Manchester, Nh Tap Water Quality 2026 Hillsborough Nashua, Nh Tap Water Quality 2026 Hillsborough Hudson, Nh Tap Water Quality 2026 Hillsborough Milford, Nh Tap Water Quality 2026 Hillsborough Litchfield, Nh Tap Water Quality 2026 Hillsborough Amherst, Nh Tap Water Quality 2026 Hillsborough