C55/100
CTWC - NAUGATUCK REG-THOMASTON SYSTEM — Water Quality Report 2026
Serving 3,789 people · Connecticut
Water Source
Groundwater
County
—
System ID
CT1400011
Violations
42
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2007.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About CTWC - NAUGATUCK REG-THOMASTON SYSTEM
Is CTWC - NAUGATUCK REG-THOMASTON SYSTEM water safe to drink?
CTWC - NAUGATUCK REG-THOMASTON SYSTEM water receives a grade of C (55/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 42 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CTWC - NAUGATUCK REG-THOMASTON SYSTEM detected?
31 contaminants were tested in CTWC - NAUGATUCK REG-THOMASTON SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CTWC - NAUGATUCK REG-THOMASTON SYSTEM have any EPA violations?
Yes, CTWC - NAUGATUCK REG-THOMASTON SYSTEM has 42 EPA violation(s) on record, with the most recent in 2007. Violation types include MR.
How many people does CTWC - NAUGATUCK REG-THOMASTON SYSTEM serve?
CTWC - NAUGATUCK REG-THOMASTON SYSTEM serves approximately 3,789 people, Connecticut. The system provides water to 2 communities: Plymouth, Thomaston.
What type of water does CTWC - NAUGATUCK REG-THOMASTON SYSTEM provide?
CTWC - NAUGATUCK REG-THOMASTON SYSTEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CT1400011.
How does CTWC - NAUGATUCK REG-THOMASTON SYSTEM compare to other utilities in Connecticut?
CTWC - NAUGATUCK REG-THOMASTON SYSTEM scores 55/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Connecticut state page for a full comparison of water systems.