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Water system · PWSID CT1240011

AQUARION-VALLEY

SHELTON, CT · ~13,080 people served

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

PWSID

CT1240011

State

Connecticut

City

SHELTON

Population served

13,080

Primary source

SWP

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

PFOA

Perfluorooctanoic acid

4.7 ppt

limit 4 ppt

Above EPA limit · 1.2×

PFOS

Perfluorooctanesulfonic acid

4.4 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFPeA

4.1 ppt

limit —

No federal limit

PFHpA

3.6 ppt

limit —

No federal limit

PFBS

3.4 ppt

limit —

No federal limit

PFHxA

3.2 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

0

Health-based

13

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2023. Official EPA record →

Other · EPA contaminant 7000 began Jul 2018 Resolved
Monitoring & reporting · Gross alpha began Oct 2009 Resolved
Monitoring & reporting · Combined radium-226/228 began Oct 2009 Resolved
Monitoring & reporting · Uranium began Oct 2009 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved

Recent enforcement actions

  • State action · SIF Nov 2023
  • State action · SIF Nov 2023
  • State action · SIE Nov 2023
  • State action · SIA Jan 2019
  • State action · SOX Jul 2018
  • State action · SIE Dec 2017
  • State action · SIF Jan 2017
  • State action · SIA Jan 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 Sep 2023

0.593 · max 1.44 mg/l as N · 90

Fluoride

1 station · latest Sep 2023

0.135 · max 0.57 mg/l · 30

Manganese

1 station · latest Sep 2023

45.2 · max 87.5 ug/l · 30

Copper

1 station · latest Sep 2023

3.5 · max 5.9 ug/l · 29

Lead

1 station · latest Sep 2023

0.135 · max 0.454 ug/l · 29

Uranium

1 station · latest Sep 2023

0.048 · max 0.121 ug/l · 27

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 CT1240011 — 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.