KILLINGWORTH, CT · Middlesex County

DENLAR APARTMENTS Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of October 14, 2015. 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 Middlesex 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): CT0261021
System type: Community Water System
Population served: 36
Service connections: 12
Ownership: privately owned
Water source: groundwater (wells)

DENLAR APARTMENTS is one of 799 community water systems in Connecticut in the 500 or fewer people size category, formerly serving 36 people from groundwater.

EPA's federal records list this system as inactive in 2015; the record below is historical.

As of August 1, 2026, its federal record holds 5 entries between 2008 and 2012, all of which EPA lists as closed. Nothing has been added since 2012.

None of the 5 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves inorganic chemicals and the Consumer Confidence Rule.

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2012 – October 24, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2011 – December 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2011 – March 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2010 – June 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2008 – December 31, 2008
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
August 10, 2012 – October 24, 2012	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2011 – December 31, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2011 – March 31, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

June 19, 2018State no longer subject to Rule2 linked violations
November 20, 2012State Compliance achieved22 linked violations
October 24, 2012State Compliance achieved1 linked violation
October 18, 2012State Public Notification received1 linked violation
September 10, 2012State Public Notification requested1 linked violation
September 10, 2012State Violation/Reminder Notice1 linked violation
March 6, 2012State Public Notification received1 linked violation
February 24, 2012State Public Notification requested6 linked violations
December 19, 2011State Public Notification received1 linked violation
December 8, 2011State Public Notification requested1 linked violation
September 8, 2011State Public Notification received2 linked violations
August 31, 2011State Violation/Reminder Notice2 linked violations
August 31, 2011State Public Notification requested1 linked violation
June 15, 2011State Public Notification received1 linked violation
June 6, 2011State Violation/Reminder Notice3 linked violations
June 6, 2011State Public Notification requested1 linked violation
March 29, 2011State Public Notification received1 linked violation
March 24, 2011State Violation/Reminder Notice2 linked violations
March 24, 2011State Public Notification requested1 linked violation
December 17, 2010State Public Notification requested2 linked violations
October 13, 2010State Public Notification received3 linked violations
October 6, 2010State Violation/Reminder Notice3 linked violations
June 11, 2010State Public Notification received3 linked violations
March 10, 2010State Violation/Reminder Notice2 linked violations
November 2, 2009State Public Notification requested3 linked violations
January 30, 2009State Public Notification requested1 linked violation
October 24, 2008State Public Notification requested5 linked violations
October 1, 2008State Public Notification requested7 linked violations
February 19, 2008State Public Notification requested3 linked violations
December 26, 2007State Public Notification requested2 linked violations
September 25, 2007State Public Notification requested1 linked violation
March 31, 2007State Compliance achieved9 linked violations
October 17, 2006State Violation/Reminder Notice4 linked violations
July 19, 2006State Violation/Reminder Notice9 linked violations
June 2, 2006State Public Notification requested4 linked violations
June 2, 2006State Violation/Reminder Notice5 linked violations
November 15, 2004State Compliance achieved7 linked violations
November 1, 2004State Violation/Reminder Notice3 linked violations

Last known contact on file (system is inactive)

LOCKE, MARY

860-663-3304

KILLINGWORTH, CT 06419