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Water system · PWSID NH2001010

ROCHESTER WATER DEPT

ROCHESTER, NH · ~25,000 people served

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

PWSID

NH2001010

State

New Hampshire

City

ROCHESTER

Population served

25,000

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

12

Violations on record

2

Unaddressed

9

Health-based

40

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2022. Official EPA record →

Other · EPA contaminant 7500 began Mar 2017 Unaddressed
Other · EPA contaminant 7500 began Dec 2016 Unaddressed
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2022 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2016 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2016 Resolved
Monitoring & reporting · Total coliform began Oct 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2005 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2003 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Feb 2001 Resolved
Treatment technique · EPA contaminant 0200 health-based began Sep 1997 Resolved

Recent enforcement actions

  • State action · SOX Jul 2022
  • State action · SIF May 2022
  • State action · SIA Apr 2022
  • State action · SIE Apr 2022
  • State action · SOX Jul 2017
  • State action · SIF Jul 2017
  • State action · SOX Jul 2017
  • State action · SIF Jul 2017

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Jul 2022

0.195 · max 0.28 mg/L · 10

Lead

1 station · latest Jul 2022

0.0011 · max 0.0012 mg/L · 3

Copper

1 station · latest Jul 2020

0.0011 · max 0.0011 mg/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system NH2001010 — 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.