SOUTH WINDSOR, CT · Hartford County
HILLSDALE WATER CO-OP Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of May 22, 2026. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in Hartford County, CT.
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)
- CT1320051
- System type
- Community Water System
- Population served
- 44
- Service connections
- 11
- Ownership
- privately owned
- Water source
- groundwater (wells)
HILLSDALE WATER CO-OP is one of 799 community water systems in Connecticut in the 500 or fewer people size category, formerly serving 44 people from groundwater.
EPA's federal records list this system as inactive in 2026; the record below is historical.
As of August 1, 2026, its federal record holds 4 entries between 1994 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.
Of the 4, 1 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 Consumer Confidence Rule and the Total Coliform Rules.
Violation history
Consumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
August 10, 2007 – November 14, 2007
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 2006 – May 31, 2006
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
August 10, 2005 – February 8, 2006
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
August 1, 1994 – August 31, 1994
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| August 10, 2007 – November 14, 2007 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| May 1, 2006 – May 31, 2006 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| August 10, 2005 – February 8, 2006 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| August 1, 1994 – August 31, 1994 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- December 31, 2006State Compliance achieved2 linked violations
- February 8, 2006State Compliance achieved3 linked violations
- January 17, 2006State Administrative/Compliance Order with penalty issued4 linked violations
- November 15, 2005State Violation/Reminder Notice7 linked violations
- November 9, 2004State Compliance achieved1 linked violation
- November 1, 2004State Violation/Reminder Notice2 linked violations
- August 30, 1994State Public Notification requested5 linked violations
- June 23, 1992State Violation/Reminder Notice5 linked violations
Last known contact on file (system is inactive)
WESTBROOK, MARIE A.
860-432-7859
SOUTH WINDSOR, CT 06074