MONSEY, CT · New London County

COLCHESTER ESTATES Water System

Current status

1 open health-based violation on record as of July 4, 2026, alongside 2 other open item(s). See the violation history below for contaminant and status details.

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): CT0280041
System type: Community Water System
Population served: 276
Service connections: 92
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2024 – December 31, 2024
Resolved
LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
Monitoring, Regular
—
Nitrite
January 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2023 – December 31, 2023
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2022 – October 12, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 29, 2021 – March 11, 2022
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2021 – August 16, 2021
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2021 – December 31, 2023
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2021 – December 31, 2023
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2021 – December 31, 2023
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Benzene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Toluene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2021 – December 31, 2023
Archived
Monitoring, Regular
—
Styrene
January 1, 2021 – December 31, 2023
Archived
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2019 – August 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2019 – August 31, 2020
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 9, 2019 – April 9, 2019
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 9, 2019 – April 9, 2019
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2018 – March 13, 2019
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2018 – August 8, 2018
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2017 – February 23, 2018
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2017 – August 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2017 – September 30, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – July 1, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2015 – February 16, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
August 31, 2015 – August 30, 2016
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – July 12, 2010
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2009 – July 31, 2009
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2005 – June 30, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2005 – March 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2004 – December 31, 2004
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 9, 2004 – October 27, 2005
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2004 – October 27, 2005
Resolved
Notification, Public
—
1,1-Dichloropropene
March 1, 1994 – March 31, 1994
Resolved
Notification, Public
—
Trichloroethylene
March 1, 1994 – March 31, 1994
Resolved
Notification, Public
—
Ethylbenzene
March 1, 1994 – March 31, 1994
Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
December 30, 2024 – December 31, 2024	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 17, 2024	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
October 17, 2024	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Unaddressed
January 1, 2023 – December 31, 2023	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2023 – December 31, 2023	Monitoring, Regular	Nitrate	—	Resolved
August 10, 2022 – October 12, 2022	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
December 29, 2021 – March 11, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 10, 2021 – August 16, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2021 – December 31, 2023	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2021 – December 31, 2023	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2021 – December 31, 2023	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2021 – December 31, 2023	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Benzene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Toluene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2021 – December 31, 2023	Monitoring, Regular	Styrene	—	Archived
September 1, 2019 – August 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
September 1, 2019 – August 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 9, 2019 – April 9, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 9, 2019 – April 9, 2019	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
December 30, 2018 – March 13, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
August 10, 2018 – August 8, 2018	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
December 30, 2017 – February 23, 2018	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
August 1, 2017 – August 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Unaddressed
July 1, 2016 – July 1, 2016	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
December 30, 2015 – February 16, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
August 31, 2015 – August 30, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
July 1, 2010 – July 12, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2009 – July 31, 2009	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
December 1, 2006 – December 31, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
August 9, 2004 – October 27, 2005	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2004 – October 27, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 1994 – March 31, 1994	Notification, Public	1,1-Dichloropropene	—	Resolved
March 1, 1994 – March 31, 1994	Notification, Public	Trichloroethylene	—	Resolved
March 1, 1994 – March 31, 1994	Notification, Public	Ethylbenzene	—	Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

December 31, 2024State Compliance achieved1 linked violation
July 1, 2024State Public Notification received20 linked violations
May 13, 2024State Public Notification requested20 linked violations
May 13, 2024State Violation/Reminder Notice20 linked violations
February 26, 2024State Compliance achieved1 linked violation
February 26, 2024State Compliance achieved1 linked violation
February 26, 2024State Compliance achieved1 linked violation
February 16, 2024State Compliance achieved2 linked violations
October 12, 2022State Compliance achieved1 linked violation
June 15, 2022State Violation/Reminder Notice1 linked violation
March 11, 2022State Compliance achieved1 linked violation
March 11, 2022State Public Notification received2 linked violations
March 10, 2022State Violation/Reminder Notice1 linked violation
August 31, 2021State Compliance achieved2 linked violations
August 16, 2021State Compliance achieved1 linked violation
December 28, 2020State Public Notification requested2 linked violations
December 28, 2020State Violation/Reminder Notice2 linked violations
April 9, 2019State Compliance achieved1 linked violation
April 9, 2019State Public Notification received1 linked violation
April 9, 2019State Compliance achieved1 linked violation
April 9, 2019State Public Notification received1 linked violation
March 13, 2019State Compliance achieved1 linked violation
February 15, 2019State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 4, 2019State Violation/Reminder Notice1 linked violation
August 8, 2018State Compliance achieved1 linked violation
February 23, 2018State Compliance achieved1 linked violation
January 8, 2018State Violation/Reminder Notice1 linked violation
January 8, 2018State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 8, 2018State Public Notification requested1 linked violation
January 8, 2018State Public Notification requested1 linked violation
January 3, 2018State Violation/Reminder Notice1 linked violation
October 31, 2017State Compliance achieved1 linked violation
September 30, 2017State Compliance achieved1 linked violation
July 10, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 21, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 22, 2017State Violation/Reminder Notice1 linked violation
July 1, 2016State Compliance achieved1 linked violation
February 16, 2016State Compliance achieved1 linked violation
November 4, 2010State Violation/Reminder Notice1 linked violation
December 22, 2009State Violation/Reminder Notice1 linked violation
April 30, 2007State Compliance achieved6 linked violations
September 21, 2006State Compliance achieved2 linked violations
November 8, 2005State Compliance achieved3 linked violations
July 21, 2005State Violation/Reminder Notice4 linked violations
December 31, 1994State Compliance achieved66 linked violations
September 30, 1990State Compliance achievedgeneral compliance action — not tied to a specific violation on record

Contact

MARKOWITZ, HILLEL

845-323-8342

MONSEY, NY 10952