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Water system · PWSID NH0411010

CHARLESTOWN WATER WORKS

CHARLESTOWN, NH · ~2,850 people served

Check your exact address → CHARLESTOWN overview
100
Excellent
PurityRadar safety score

PWSID

NH0411010

State

New Hampshire

City

CHARLESTOWN

Population served

2,850

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

10

Violations on record

0

Unaddressed

2

Health-based

41

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2025. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2025 Resolved
Other · EPA contaminant 7000 began Jul 2021 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2019 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2019 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2019 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2017 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1991 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 1991 Resolved

Recent enforcement actions

  • State action · SIF Nov 2025
  • State action · SIF Nov 2025
  • State action · SOX Oct 2025
  • State action · SIE Oct 2025
  • State action · SIA Oct 2025
  • State action · SIA Oct 2025
  • State action · SIE Oct 2025
  • State action · SOX Oct 2025

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Jun 2022

0.33 · max 0.33 mg/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system NH0411010 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.