LONDONDERRY

NASHUA, NH · ~6,255 people served

Check your exact address → NASHUA overview

Good

PurityRadar safety score

PWSID

NH1391010

State

New Hampshire

City

NASHUA

Population served

6,255

Primary source

SWP

Score history

▼ 23 points — the score moved from 100 to 77 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 77

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

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Feb 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

6.4 ppt

limit 4 ppt

Above EPA limit · 1.6×

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2014. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2013 Resolved

Recent enforcement actions

State action · SOX Jun 2014
State action · SOX Jun 2014
State action · SIF Apr 2014
State action · SIF Apr 2014
State action · SIA Mar 2014
State action · SIE Mar 2014
State action · SIE Mar 2014
State action · SIA Mar 2014

This profile is built from EPA public records for system NH1391010 — 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.