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Groton, NH Tap Water Quality 2026

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

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

Main Utility: Tenney Brook Ii PWSID: NH1942010 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead has not been reported for this system and no violations are open. PFAS has never been sampled at this system.

B

Groton earns a B for water quality

Graded on violations alone, with state inspection findings. PFAS not tested. Lead not reported.

Lead: not reported
PFAS never sampled at this system
2 violations since 2015, 0 health-based
No violations currently open
Groton's lead level vs. all New Hampshire community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: — 0% of the federal action level
✓ Lower lead than % of New Hampshire utilities
Population Served
50
~91 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
2 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Action level: 15 ppb
No lead result has been reported for this system in the current window. That is a gap in state reporting, not a finding of safety.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2017–2018 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 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

2 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 Tenney Brook Ii
PWSID NH1942010
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 50
Service connections 91
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Groton tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Groton water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Groton? ▼
Tenney Brook Ii (PWSID NH1942010). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-08-06. Inspectors recorded 1 significant deficiency.

What Should Groton 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

Lebanon, Nh Tap Water Quality 2026 Grafton Hanover, Nh Tap Water Quality 2026 Grafton Plymouth, Nh Tap Water Quality 2026 Grafton Littleton, Nh Tap Water Quality 2026 Grafton Bristol, Nh Tap Water Quality 2026 Grafton Bethlehem, Nh Tap Water Quality 2026 Grafton