HIDDEN VALLEY/MASON

MOULTONBOROUGH, NH · ~298 people served

Check your exact address → MOULTONBOROUGH overview

100

Excellent

PurityRadar safety score

PWSID

NH2372020

State

New Hampshire

City

MOULTONBOROUGH

Population served

298

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved

Treatment technique · Lead & Copper Rule health-based began Dec 2016 Resolved

Reporting · Lead & Copper Rule began Dec 2016 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Dec 2010 Resolved

Monitoring & reporting · Nitrite began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2015 began Jan 1994 Resolved

Monitoring & reporting · EPA contaminant 2378 began Jan 1994 Resolved

Monitoring & reporting · EPA contaminant 2955 began Jan 1994 Resolved

Monitoring & reporting · EPA contaminant 2010 began Jan 1994 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jan 1994 Resolved

Monitoring & reporting · EPA contaminant 2005 began Jan 1994 Resolved

Recent enforcement actions

State action · SOX Oct 2024
State action · SIA Oct 2024
State action · SIF Feb 2017
State action · SIF Feb 2017
State action · SOX Jan 2017
State action · SIE Jan 2017
State action · SIA Jan 2017
State action · SOX Mar 2012

This profile is built from EPA public records for system NH2372020 — 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.