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Hopkinton, NH Tap Water Quality 2026

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

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

Main Utility: Contoocook Village Pct PWSID: NH1191010 Updated: 2026 Q2
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Lead above the federal action level

Lead is 37.00 ppb, 247% of the action level and no violations are open. PFAS has never been sampled at this system.

D

Hopkinton earns a D for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 37.00 ppb — 247% of the federal action level
PFAS never sampled at this system
29 violations since 2015, 24 health-based
No violations currently open
Hopkinton's lead level vs. all New Hampshire community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 37.00 ppb — 100% of the federal action level
✓ Lower lead than 20% of New Hampshire utilities
Population Served
2396
~595 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
29 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
100% of EPA action level
37.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 37.00 ppb, 247% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MCL EXCEEDANCE 0.114 MG/L 0.080 mg/L 2026 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.16 MG/L 0.060 mg/L 2026 Archived
TTHM MCL EXCEEDANCE 0.11 MG/L 0.080 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.148 MG/L 0.060 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.101 MG/L 0.080 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.148 MG/L 0.060 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.125 MG/L 0.060 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2025 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.104 MG/L 0.060 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.093 MG/L 0.080 mg/L 2024 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.114 MG/L 0.060 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2024 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.099 MG/L 0.060 mg/L 2024 Archived
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2024 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.107 MG/L 0.060 mg/L 2024 Archived
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.078 MG/L 0.060 mg/L 2024 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.068 MG/L 0.060 mg/L 2021 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.074 MG/L 0.060 mg/L 2021 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.071 MG/L 0.060 mg/L 2021 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.072 MG/L 0.060 mg/L 2020 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.074 MG/L 0.060 mg/L 2020 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.068 MG/L 0.060 mg/L 2020 Resolved
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.061 MG/L 0.060 mg/L 2020 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2019 Archived
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2018 Archived
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 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

29 violations are on record since 2015, of which 24 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Contoocook Village Pct
PWSID NH1191010
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 2,396
Service connections 595
Systems serving this area 6
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Hopkinton tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 37.00 ppb, 247% of the action level.
Does Hopkinton 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 Hopkinton? ▼
Contoocook Village Pct (PWSID NH1191010), one of 6 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2026-03-02. No significant deficiencies were recorded.

What Should Hopkinton Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
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

Concord, Nh Tap Water Quality 2026 Merrimack Franklin, Nh Tap Water Quality 2026 Merrimack Pembroke, Nh Tap Water Quality 2026 Merrimack Suncook, Nh Tap Water Quality 2026 Merrimack Hooksett, Nh Tap Water Quality 2026 Merrimack Henniker, Nh Tap Water Quality 2026 Merrimack