SHELTON, CT · Litchfield County
AQUARION-TWIN OAKS Water System
Consumer Confidence Report status
AQUARION-TWIN OAKS 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 AQUARION-TWIN OAKS.
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)
- CT0968011
- System type
- Community Water System
- Population served
- 152
- Service connections
- 57
- Ownership
- privately owned
- Water source
- groundwater (wells)
AQUARION-TWIN OAKS is one of 799 community water systems in Connecticut in the 500 or fewer people size category, serving 152 people from groundwater.
As of August 1, 2026, its federal record holds 5 entries between 2004 and 2021, all of which EPA lists as closed. Nothing has been added since 2021.
All 5 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 volatile organic chemicals and the Lead and Copper Rule.
Violation history
Lead Consumer Notice
—Lead and Copper Rule
December 30, 2021 – January 21, 2022
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2004 – December 31, 2006
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2004 – December 31, 2006
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2004 – December 31, 2006
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2004 – December 31, 2006
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| December 30, 2021 – January 21, 2022 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| January 1, 2004 – December 31, 2006 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2004 – December 31, 2006 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2004 – December 31, 2006 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2004 – December 31, 2006 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- January 21, 2022State Compliance achieved2 linked violations
- January 16, 2019State Violation/Reminder Notice3 linked violations
- October 13, 2006State Violation/Reminder Notice1 linked violation
- August 9, 2006State Compliance achieved4 linked violations
- November 14, 1995State Compliance achieved9 linked violations
Common questions
Is AQUARION-TWIN OAKS required to publish a Consumer Confidence Report?
- Yes. AQUARION-TWIN OAKS 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 AQUARION-TWIN OAKS’s next Consumer Confidence Report due?
- AQUARION-TWIN OAKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does AQUARION-TWIN OAKS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for AQUARION-TWIN OAKS.
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
ULRICH, ROBERT J.
203-926-4320
SHELTON, CT 06484