Public water system · CT0310011
ActiveAquarion-Cornwall
At a glance
Aquarion-Cornwall (PWSID CT0310011) is an active community water system in Litchfield County, Connecticut. It reports serving 98 people through 61 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 July 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
98
Service connections
61
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Aquarion-Cornwall compare with other water systems in Litchfield County?
By EPA's size categories, Aquarion-Cornwall is a very small system (500 people or fewer). Litchfield County has 346 active public water systems. Its population served is well below the county average of 340 people per system, and accounts for less than 0.1% 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 Aquarion-Cornwall is well 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 Aquarion-Cornwall?
EPA lists Aquarion-Cornwall 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 Aquarion-Cornwall have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2018. The violations listed here began between January 2016 and July 2018. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Consumer Confidence Rule, Arsenic, Chromium and Fluoride. 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 |
|---|---|---|---|---|
| 2018-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | 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.
Aquarion-Cornwall: frequently asked questions
Who runs Aquarion-Cornwall?
Aquarion-Cornwall (PWSID CT0310011) is a community water system privately owned. It is regulated by the CT state drinking water program.
How many people does Aquarion-Cornwall serve?
Aquarion-Cornwall reports serving 98 people through 61 service connections in Litchfield County, Connecticut.
Where does Aquarion-Cornwall 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 Aquarion-Cornwall 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 July 2018. 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 Aquarion-Cornwall'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 July 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the CT state drinking water program.
Where can I find Aquarion-Cornwall's water quality report?
As a community water system, Aquarion-Cornwall 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 |
| Ctwc - Naugatuck Reg-Thomaston System | Litchfield | 3,789 | Community | Groundwater |
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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, “Aquarion-Cornwall, PWSID CT0310011, Connecticut”, https://aquacensus.com/water-systems/connecticut/aquarion-cornwall-ct0310011 (data as of October 1, 2026).