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Water system · PWSID CT0450011

EAST LYME WATER & SEWER COMMISSION

NIANTIC, CT · ~15,245 people served

Check your exact address → NIANTIC overview
60
Fair
PurityRadar safety score

PWSID

CT0450011

State

Connecticut

City

NIANTIC

Population served

15,245

Primary source

SWP

Score history

▼ 40 points — the score moved from 100 to 60 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 60

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 May 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

8 ppt

limit 4 ppt

Above EPA limit · 2.0×

PFOS

Perfluorooctanesulfonic acid

6.7 ppt

limit 4 ppt

Above EPA limit · 1.7×

PFPeA

5.6 ppt

limit —

No federal limit

PFHxA

5.1 ppt

limit —

No federal limit

PFBS

3 ppt

limit —

No federal limit

PFHpA

3 ppt

limit —

No federal limit

Violations & enforcement

218

Violations on record

0

Unaddressed

6

Health-based

89

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2025. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2024 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2024 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2021 Resolved
Monitoring & reporting · EPA contaminant 2981 began Jan 2021 Resolved

Recent enforcement actions

  • State action · SIF May 2025
  • State action · SOX Mar 2025
  • State action · SIE Feb 2025
  • State action · SIA Feb 2025
  • State action · SOX Dec 2022
  • State action · SIF Jun 2022
  • State action · SIF Jun 2022
  • State action · SIA Mar 2022

This profile is built from EPA public records for system CT0450011 — 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.