AQUARION-MYSTIC

SHELTON, CT · ~10,788 people served

Check your exact address → SHELTON overview

100

Excellent

PurityRadar safety score

PWSID

CT1370011

State

Connecticut

City

SHELTON

Population served

10,788

Primary source

Surface water

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2025). Levels in parts per trillion (ppt).

PFBS

4 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2020. Official EPA record →

Other · EPA contaminant 7000 began Aug 2018 Resolved

Other · EPA contaminant 7000 began Jul 2018 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2979 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2969 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2378 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2968 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2980 began Jan 2018 Resolved

Monitoring & reporting · EPA contaminant 2981 began Jan 2018 Resolved

Recent enforcement actions

State action · SIF Feb 2020
State action · SOX Dec 2019
State action · SIE May 2019
State action · SIA May 2019
State action · SOX May 2019
State action · SIA May 2019
State action · SIA Jan 2019
State action · SOX Jul 2018

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

7 stations · latest Oct 2022

39 · max 1,560 ug/L · 133

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 CT1370011 — 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.