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Water system · PWSID NH1712040

WILDER VILLAGE CLUSTER

DERRY, NH · ~45 people served

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

PWSID

NH1712040

State

New Hampshire

City

DERRY

Population served

45

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

17

Violations on record

0

Unaddressed

8

Health-based

54

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2019. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Jan 2019 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2017 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2012 Resolved
Monitoring & reporting · Total coliform began Jan 2009 Resolved
Monitoring & reporting · Total coliform began Nov 2008 Resolved
Other · EPA contaminant 7000 began Oct 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2008 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2007 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2007 Resolved
Other · EPA contaminant 7000 began Oct 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1992 Resolved

Recent enforcement actions

  • State action · SOX Apr 2019
  • State action · SIA Apr 2019
  • State action · SOX Feb 2018
  • State action · SIF Aug 2017
  • State action · SIE Jul 2017
  • State action · SIA Jul 2017
  • State action · SOX Jul 2012
  • State action · SIA Jul 2012

This profile is built from EPA public records for system NH1712040 — 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.