Is CTWC - UNIONVILLE SYSTEM required to publish a Consumer Confidence Report?

Yes. CTWC - UNIONVILLE SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is CTWC - UNIONVILLE SYSTEM’s next Consumer Confidence Report due?

CTWC - UNIONVILLE SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

CLINTON, CT · Hartford County

CTWC - UNIONVILLE SYSTEM Water System

Consumer Confidence Report status

CTWC - UNIONVILLE SYSTEM must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for CTWC - UNIONVILLE SYSTEM.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Connecticut’s official records. Always confirm current status with Connecticut before making decisions based on this information.

System facts

System ID (PWSID): CT0520011
System type: Community Water System
Population served: 14,693
Service connections: 6,319
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

CTWC - UNIONVILLE SYSTEM is one of 35 community water systems in Connecticut in the 10,001 to 100,000 people size category, serving 14,693 people from surface water.

As of August 1, 2026, its federal record holds 4 entries between 1991 and 2026, all of which EPA lists as closed.

Of the 4, 2 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, the Groundwater Rule, and the Lead and Copper Rule.

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
May 1, 2026 – May 31, 2026
Archived
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2016 – May 9, 2022
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2002 – August 31, 2002
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
April 1, 1991 – June 30, 1991
Resolved

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 2026 – May 31, 2026	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Archived
December 30, 2016 – May 9, 2022	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
August 1, 2002 – August 31, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 1991 – June 30, 1991	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

May 9, 2022State Compliance achieved1 linked violation
April 9, 2020State Public Notification received1 linked violation
March 13, 2020State Violation/Reminder Notice1 linked violation
March 13, 2020State Public Notification requested1 linked violation
December 31, 2019State Compliance achieved1 linked violation
April 28, 2017State Violation/Reminder Notice1 linked violation
December 16, 2016State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 14, 2016State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 14, 2016State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
March 4, 2016State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 3, 2016State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
March 3, 2016State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 17, 2002State Compliance achieved2 linked violations
August 27, 2002State Violation/Reminder Notice2 linked violations

Common questions

Is CTWC - UNIONVILLE SYSTEM required to publish a Consumer Confidence Report?: Yes. CTWC - UNIONVILLE SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is CTWC - UNIONVILLE SYSTEM’s next Consumer Confidence Report due?: CTWC - UNIONVILLE SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CTWC - UNIONVILLE SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for CTWC - UNIONVILLE SYSTEM.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MCDERMOTT, GERALD

860-664-6125

CLINTON, CT 06413