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Water system · PWSID CT0150011

AQUARION-EASTERN FAIRFIELD COUNTY

SHELTON, CT · ~351,756 people served

Check your exact address → SHELTON overview
67
Fair
PurityRadar safety score

PWSID

CT0150011

State

Connecticut

City

SHELTON

Population served

351,756

Primary source

Surface water

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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).

PFOS

Perfluorooctanesulfonic acid

5.9 ppt

limit 4 ppt

Above EPA limit · 1.5×

PFOA

Perfluorooctanoic acid

4.2 ppt

limit 4 ppt

Above EPA limit · 1.0×

PFHxA

7.4 ppt

limit —

No federal limit

PFPeA

6.7 ppt

limit —

No federal limit

PFBA

5.7 ppt

limit —

No federal limit

PFBS

4.1 ppt

limit —

No federal limit

PFHpA

3.9 ppt

limit —

No federal limit

Violations & enforcement

129

Violations on record

0

Unaddressed

1

Health-based

32

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2021. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Sep 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2020 Resolved
Other · EPA contaminant 7000 began Jul 2018 Resolved
Monitoring & reporting · EPA contaminant 2032 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2040 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2034 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2036 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2039 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2035 began Jan 2016 Resolved
Monitoring & reporting · EPA contaminant 2005 began Jan 2016 Resolved

Recent enforcement actions

  • State action · SOX Dec 2021
  • State action · SOX Dec 2021
  • State action · SIF Sep 2021
  • State action · SOX Jan 2021
  • State action · SOX Dec 2020
  • State action · SIE Oct 2020
  • State action · SIA Oct 2020
  • State action · SIF Feb 2020

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

8 stations · latest Sep 2023

0.742 · max 2.97 mg/l as N · 353

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 CT0150011 — 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.