Public water system · CT1400011
ActiveCtwc - Naugatuck Reg-Thomaston System
At a glance
Ctwc - Naugatuck Reg-Thomaston System (PWSID CT1400011) is an active community water system in Litchfield County, Connecticut. It reports serving 3,789 people through 1,692 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,789
Service connections
1,692
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Ctwc - Naugatuck Reg-Thomaston System compare with other water systems in Litchfield County?
By EPA's size categories, Ctwc - Naugatuck Reg-Thomaston System is a medium system (3,301 to 10,000 people). Litchfield County has 346 active public water systems, and Ctwc - Naugatuck Reg-Thomaston System is the 6th-largest of them by population served. Its population served is about 11 times the county average of 340 people per system, and accounts for 3.2% of the 117,512 people reported by systems filed under the county. Across Connecticut, the 2,363 active systems average 1,247 people each. Nationally, the average active community water system reports serving 6,703 people, so Ctwc - Naugatuck Reg-Thomaston System is about 43% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Connecticut has 481 active community water systems, 20% of the state's 2,363 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,263 Connecticut systems (96%) list groundwater as their primary source.
Who owns and regulates Ctwc - Naugatuck Reg-Thomaston System?
EPA lists Ctwc - Naugatuck Reg-Thomaston System as privately owned. The CT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 297 of the 346 active systems in Litchfield County (86%) are also privately owned.
Does Ctwc - Naugatuck Reg-Thomaston System have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2007. The violations listed here began between April 2007 and April 2007. By type: 12 monitoring and reporting. The contaminants or rules involved are Dichloromethane, Trichloroethylene, o-Dichlorobenzene and Chlorobenzene. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Ctwc - Naugatuck Reg-Thomaston System: frequently asked questions
Who runs Ctwc - Naugatuck Reg-Thomaston System?
Ctwc - Naugatuck Reg-Thomaston System (PWSID CT1400011) is a community water system privately owned. It is regulated by the CT state drinking water program.
How many people does Ctwc - Naugatuck Reg-Thomaston System serve?
Ctwc - Naugatuck Reg-Thomaston System reports serving 3,789 people through 1,692 service connections in Litchfield County, Connecticut.
Where does Ctwc - Naugatuck Reg-Thomaston System get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Ctwc - Naugatuck Reg-Thomaston System have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2007. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Ctwc - Naugatuck Reg-Thomaston System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2007. For current results, consult the system's annual water quality report, EPA ECHO, or the CT state drinking water program.
Where can I find Ctwc - Naugatuck Reg-Thomaston System's water quality report?
As a community water system, Ctwc - Naugatuck Reg-Thomaston System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Litchfield County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Torrington Water Company | Litchfield | 37,915 | Community | Surface water |
| Watertown Water & Sewer Authority | Litchfield | 9,972 | Community | Purchased surface water |
| Winsted Water Works | Litchfield | 7,784 | Community | Surface water |
| Watertown Fire District | Litchfield | 6,718 | Community | Groundwater |
| Ctwc - Naugatuck Reg-Terryville System | Litchfield | 5,607 | Community | Groundwater |
| Aquarion-Litchfield Regional | Litchfield | 3,097 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Ctwc - Naugatuck Reg-Thomaston System, PWSID CT1400011, Connecticut”, https://aquacensus.com/water-systems/connecticut/ctwc-naugatuck-reg-thomaston-system-ct1400011 (data as of October 1, 2026).