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Water system · PWSID NH1051010

AQUARION WATER/NH

MONROE, CT · ~18,950 people served

Check your exact address → MONROE overview
77
Good
PurityRadar safety score

PWSID

NH1051010

State

Connecticut

City

MONROE

Population served

18,950

Primary source

Groundwater

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 Nov 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

4.7 ppt

limit 4 ppt

Above EPA limit · 1.2×

PFOS

Perfluorooctanesulfonic acid

4.5 ppt

limit 4 ppt

Above EPA limit · 1.1×

Lithium

24,900 ppt

limit —

No federal limit

PFPeA

25 ppt

limit —

No federal limit

PFHxA

10 ppt

limit —

No federal limit

PFBA

5 ppt

limit —

No federal limit

Violations & enforcement

8

Violations on record

0

Unaddressed

0

Health-based

16

Enforcement actions

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

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2024 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2024 Resolved
Monitoring & reporting · Uranium began Jul 2010 Resolved
Other · EPA contaminant 7000 began Jul 2009 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2008 Resolved
Other · EPA contaminant 7000 began Oct 2007 Resolved
Monitoring & reporting · Nitrite began Jan 1993 Resolved

Recent enforcement actions

  • State action · SOX Oct 2024
  • State action · SOX Oct 2024
  • State action · SIA Oct 2024
  • State action · SIA Oct 2024
  • State action · SOX Oct 2010
  • State action · SIA Oct 2010
  • State action · SOX Jul 2009
  • State action · SIA Jul 2009

This profile is built from EPA public records for system NH1051010 — 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.