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Water system · PWSID NH1121010

COGSWELL SPRINGS WATER WORKS

HENNIKER, NH · ~3,000 people served

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

PWSID

NH1121010

State

New Hampshire

City

HENNIKER

Population served

3,000

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

4

Health-based

39

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2020. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Dec 2019 Resolved
Monitoring & reporting · EPA contaminant 3014 began Jun 2017 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2010 Resolved
Monitoring & reporting · Total coliform began Aug 2010 Resolved
Other · EPA contaminant 7000 began Jul 2010 Resolved
Monitoring & reporting · Total coliform began Apr 2010 Resolved
Monitoring & reporting · EPA contaminant 3014 began Apr 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 1991 Resolved

Recent enforcement actions

  • State action · SOX Jan 2020
  • State action · SIA Jan 2020
  • State action · SIF Jul 2017
  • State action · SOX Jun 2017
  • State action · SIE Jun 2017
  • State action · SIA Jun 2017
  • State action · SOX May 2011
  • State action · SIF Oct 2010

This profile is built from EPA public records for system NH1121010 — 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.