COLCHESTER, CT · New London County

COLCHESTER SEWER & WATER COMMISSION Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): CT0280011
System type: Community Water System
Population served: 4,020
Service connections: 2,100
Ownership: local government
Water source: groundwater (wells)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
June 15, 2025 – August 29, 2025
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
January 1, 2024 – January 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2022 – November 30, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 26, 2020 – June 30, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2018 – December 31, 2018
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
December 1, 2018 – December 31, 2018
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
December 1, 2018 – December 31, 2018
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2016 – June 30, 2016
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2015 – September 30, 2015
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
Styrene
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2014 – December 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2012 – December 31, 2020
Archived
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2009 – December 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2008 – September 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2007 – June 30, 2007
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
June 15, 2025 – August 29, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2024 – January 31, 2024	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
October 1, 2022 – November 30, 2022	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
February 26, 2020 – June 30, 2020	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
December 1, 2018 – December 31, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2018 – December 31, 2018	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
December 1, 2018 – December 31, 2018	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
April 1, 2016 – June 30, 2016	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2015 – September 30, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	Styrene	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2014 – December 31, 2014	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2012 – December 31, 2020	Monitoring, Regular	Asbestos	—	Archived
October 1, 2009 – December 31, 2009	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2008 – September 30, 2008	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2007 – June 30, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved

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

Enforcement actions

December 31, 2025State Compliance achieved2 linked violations
August 29, 2025State Public Notification received2 linked violations
August 29, 2025State Compliance achieved1 linked violation
August 29, 2025State Public Notification received1 linked violation
August 29, 2025State Compliance achieved1 linked violation
October 16, 2024State Violation/Reminder Notice2 linked violations
October 16, 2024State Public Notification requested2 linked violations
July 16, 2024State Violation/Reminder Notice1 linked violation
June 4, 2024State Violation/Reminder Notice1 linked violation
June 4, 2024State Violation/Reminder Notice1 linked violation
June 4, 2024State Public Notification requested2 linked violations
June 4, 2024State Public Notification requested1 linked violation
April 30, 2024State Compliance achieved1 linked violation
February 9, 2024State Compliance achieved1 linked violation
July 17, 2023State Compliance achieved1 linked violation
May 25, 2023State Public Notification requested1 linked violation
November 30, 2022State Compliance achieved1 linked violation
June 15, 2022State Violation/Reminder Notice2 linked violations
December 3, 2021State Public Notification received2 linked violations
October 25, 2021State Public Notification received2 linked violations
July 2, 2021State Compliance achieved1 linked violation
March 1, 2021State Violation/Reminder Notice1 linked violation
September 23, 2020State Violation/Reminder Notice2 linked violations
June 30, 2020State Compliance achieved1 linked violation
January 23, 2020State Violation/Reminder Notice2 linked violations
May 28, 2019State Violation/Reminder Notice2 linked violations
March 6, 2019State Compliance achieved7 linked violations
February 25, 2019State Violation/Reminder Notice5 linked violations
December 23, 2015State Compliance achieved2 linked violations
March 2, 2010State Violation/Reminder Notice2 linked violations
August 29, 2007State Compliance achieved6 linked violations
August 20, 2007State Violation/Reminder Notice8 linked violations
March 31, 1993State Compliance achieved6 linked violations
March 17, 1993State Public Notification received13 linked violations
January 26, 1993State Violation/Reminder Notice18 linked violations

Contact

LEONE, JOSEPH D.

860-537-7288

COLCHESTER, CT 06415