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Water system · PWSID CT0520011

CTWC - UNIONVILLE SYSTEM

CLINTON, CT · ~14,693 people served

Check your exact address → CLINTON overview

Fair

PurityRadar safety score

PWSID

CT0520011

State

Connecticut

City

CLINTON

Population served

14,693

Primary source

SWP

Score history

▼ 41 points — the score moved from 100 to 59 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 59

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 Sep 2023). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

6 ppt

limit 4 ppt

Above EPA limit · 1.5×

PFOS

Perfluorooctanesulfonic acid

6 ppt

limit 4 ppt

Above EPA limit · 1.5×

PFHxS

Perfluorohexanesulfonic acid

3 ppt

limit 10 ppt

Below EPA limit

PFBA

7 ppt

limit —

No federal limit

PFHxA

4 ppt

limit —

No federal limit

PFPeA

4 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2022. Official EPA record →

Treatment technique · EPA contaminant 0700 health-based began Nov 2019 Resolved

Monitoring & reporting · Lead & Copper Rule began Dec 2016 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2002 Resolved

Monitoring & reporting · Total coliform began Jan 1999 Resolved

Monitoring & reporting · Total coliform began Apr 1991 Resolved

Recent enforcement actions

State action · SOX May 2022
State action · SIF Apr 2020
State action · SIA Mar 2020
State action · SIE Mar 2020
State action · SOX Dec 2019
State action · SIA Apr 2017
State action · SIF Dec 2016
State action · SIA Dec 2016

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 Jul 2023

0.123 · max 0.205 mg/l as N · 28

Copper

1 station · latest Jul 2023

0.605 · max 1 ug/l · 14

Lead

1 station · latest Jul 2023

0.092 · max 0.148 ug/l · 14

Manganese

1 station · latest Jul 2023

11.5 · max 17.3 ug/l · 14

Fluoride

1 station · latest Apr 2023

0.04 · max 0.05 mg/l · 13

Uranium

1 station · latest Jul 2023

0.034 · max 0.034 ug/l · 1

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 CT0520011 — 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.