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Water system · PWSID CT1180011

AQUARION-RIDGEFIELD

SHELTON, CT · ~7,476 people served

Check your exact address → SHELTON overview
65
Fair
PurityRadar safety score

PWSID

CT1180011

State

Connecticut

City

SHELTON

Population served

7,476

Primary source

SWP

Score history

▼ 35 points — the score moved from 100 to 65 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 65

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 Jan 2025). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

6.1 ppt

limit 4 ppt

Above EPA limit · 1.5×

PFOA

Perfluorooctanoic acid

5 ppt

limit 4 ppt

Above EPA limit · 1.3×

Lithium

9,170 ppt

limit —

No federal limit

PFHpA

5.4 ppt

limit —

No federal limit

PFBA

5.3 ppt

limit —

No federal limit

PFHxA

3.5 ppt

limit —

No federal limit

PFBS

3.2 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

21

Violations on record

0

Unaddressed

1

Health-based

45

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Dec 2021 Resolved
Other · EPA contaminant 7500 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 3014 began Sep 2019 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved
Monitoring & reporting · Total coliform began May 1993 Resolved
Monitoring & reporting · Beryllium began Jan 1992 Resolved
Monitoring & reporting · EPA contaminant 1036 began Jan 1992 Resolved
Monitoring & reporting · Cyanide began Jan 1992 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jan 1992 Resolved
Monitoring & reporting · Selenium began Jan 1992 Resolved

Recent enforcement actions

  • State action · SOX Jan 2022
  • State action · SIF Sep 2021
  • State action · SOX May 2021
  • State action · SIA Apr 2021
  • State action · SIA Jan 2020
  • State action · SIE Jan 2020
  • State action · SOX Sep 2019
  • State action · SIA Jan 2019

This profile is built from EPA public records for system CT1180011 — 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.