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Water system · PWSID CT1030021

SOUTH NORWALK ELECTRIC & WATER

WILTON, CT · ~42,000 people served

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

PWSID

CT1030021

State

Connecticut

City

WILTON

Population served

42,000

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

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

73

Violations on record

0

Unaddressed

2

Health-based

24

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2024. Official EPA record →

Other · EPA contaminant 7000 began Aug 2024 Resolved
Other · EPA contaminant 7000 began Jul 2024 Resolved
Other · EPA contaminant 7000 began Aug 2009 Resolved
Other · EPA contaminant 7000 began Jul 2009 Resolved
Other · EPA contaminant 7000 began Aug 2008 Resolved
Other · EPA contaminant 7000 began Jul 2008 Resolved
Treatment technique · EPA contaminant 0300 health-based began Nov 2006 Resolved
Other · EPA contaminant 7000 began Jul 2006 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2006 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2006 Resolved
Monitoring & reporting · EPA contaminant 2046 began Oct 2001 Resolved
Monitoring & reporting · EPA contaminant 2067 began Oct 2001 Resolved

Recent enforcement actions

  • State action · SIA Aug 2024
  • State action · SIA Aug 2024
  • State action · SOX Aug 2024
  • State action · SOX Aug 2024
  • State action · SIA Nov 2009
  • State action · SOX Oct 2009
  • State action · SOX Oct 2009
  • State action · SIA Nov 2008

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

2 stations · latest Oct 2020

0.36 · max 0.418 ppm · 2

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 CT1030021 — 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.