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Water system · PWSID NH0142010

LOCKE LAKE

NASHUA, NH · ~2,280 people served

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

PWSID

NH0142010

State

New Hampshire

City

NASHUA

Population served

2,280

Primary source

Surface water

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

67

Violations on record

0

Unaddressed

8

Health-based

53

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2018. Official EPA record →

Max contaminant level (MCL) · Arsenic health-based began Apr 2018 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2018 Resolved
Monitoring & reporting · EPA contaminant 3014 began Aug 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2012 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2012 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2010 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2007 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2007 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2007 Resolved
Monitoring & reporting · Total coliform began Feb 2006 Resolved
Monitoring & reporting · Nitrate began Jan 1995 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 1995 Resolved

Recent enforcement actions

  • State action · SOX Aug 2018
  • State action · SIF May 2018
  • State action · SIA Apr 2018
  • State action · SIE Apr 2018
  • State action · SIF Feb 2018
  • State action · SIE Jan 2018
  • State action · SIA Jan 2018
  • State action · SOX Feb 2013

This profile is built from EPA public records for system NH0142010 — 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.