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Water system · PWSID CT0378011

AQUARION-EAST DERBY

SHELTON, CT · ~1,101 people served

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

PWSID

CT0378011

State

Connecticut

City

SHELTON

Population served

1,101

Primary source

SWP

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

13

Violations on record

1

Unaddressed

0

Health-based

21

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2019. Official EPA record →

Other · EPA contaminant 7500 began Sep 2013 Unaddressed
Other · EPA contaminant 7000 began Jul 2018 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2014 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2014 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2014 Resolved
Other · EPA contaminant 7500 began Dec 2013 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2012 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2012 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2012 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2012 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2007 Resolved
Other · EPA contaminant 7000 began Aug 2005 Resolved

Recent enforcement actions

  • State action · SIA Jan 2019
  • State action · SOX Jul 2018
  • State action · SOX Jun 2017
  • State action · SIA May 2017
  • State action · SIF Sep 2014
  • State action · SOX Sep 2014
  • State action · SOX Aug 2014
  • State action · SIA Aug 2014

This profile is built from EPA public records for system CT0378011 — 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.