COLCHESTER, CT · New London County

COLCHESTER COMMONS Water System

Current status

1 open health-based violation on record as of July 4, 2026, alongside 1 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): CT0286011
System type: Community Water System
Population served: 224
Service connections: 96
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
Maximum Contaminant Level Violation, E. coli (RTCR)
Health-based
Revised Total Coliform Rule
October 1, 2022 – October 31, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 6, 2011 – August 28, 2012
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 8, 2011 – August 28, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2010 – December 28, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – December 28, 2010
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 22, 2010 – February 8, 2011
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 2010 – February 8, 2011
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2009 – July 31, 2009
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2009 – August 31, 2009
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Tetrachloroethylene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
CHLOROBENZENE
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Benzene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Toluene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Styrene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Endrin
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
BHC-GAMMA
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Methoxychlor
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Toxaphene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Dalapon
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Diquat
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Glyphosate
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
OXAMYL
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Simazine
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Picloram
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Dinoseb
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Aldicarb sulfone
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Carbofuran
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
LASSO
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Heptachlor
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
2,4-D
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
2,4,5-TP
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Combined Uranium
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Aldicarb
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Vinyl chloride
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Carbon tetrachloride
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 2009 – June 30, 2009
Resolved
Monitoring, Regular
—
Trichloroethylene
April 1, 2009 – June 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2006 – June 30, 2006
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2004 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2004 – March 31, 2004
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2003 – December 31, 2003
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2001 – October 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2001 – September 30, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 1991 – June 30, 1991
Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

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
October 1, 2022 – October 31, 2022	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
November 6, 2011 – August 28, 2012	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 8, 2011 – August 28, 2012	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
September 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2011 – September 30, 2011	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2010 – December 28, 2010	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2010 – December 28, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 22, 2010 – February 8, 2011	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2010 – February 8, 2011	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 2009 – July 31, 2009	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2009 – August 31, 2009	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Tetrachloroethylene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	CHLOROBENZENE	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Benzene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Toluene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Styrene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Endrin	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	BHC-GAMMA	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Methoxychlor	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Toxaphene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Dalapon	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Diquat	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Glyphosate	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	OXAMYL	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Simazine	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Picloram	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Dinoseb	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Aldicarb sulfone	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Carbofuran	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	LASSO	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Heptachlor	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Heptachlor epoxide	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	2,4-D	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	2,4,5-TP	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Chlordane	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Combined Uranium	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Aldicarb	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Vinyl chloride	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring, Regular	Trichloroethylene	—	Resolved
April 1, 2006 – June 30, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2004 – March 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrite	—	Resolved
October 1, 2001 – October 31, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2001 – September 30, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 1991 – June 30, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Enforcement actions

August 9, 2025State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
December 31, 2024State Compliance achieved1 linked violation
December 31, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 20, 2024State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
November 20, 2024State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 30, 2022State Compliance achieved5 linked violations
November 22, 2022State Violation/Reminder Notice2 linked violations
October 17, 2022State Public Notification received2 linked violations
December 13, 2019State Public Notification received3 linked violations
December 6, 2019State Public Notification requested3 linked violations
May 22, 2019State Compliance achieved2 linked violations
December 29, 2017State Violation/Reminder Notice1 linked violation
July 6, 2017State Compliance achieved2 linked violations
December 31, 2012State Compliance achieved4 linked violations
November 28, 2012State Violation/Reminder Notice2 linked violations
October 22, 2012State Public Notification received2 linked violations
October 3, 2012State Violation/Reminder Notice2 linked violations
October 3, 2012State Public Notification received2 linked violations
September 18, 2012State Violation/Reminder Notice1 linked violation
September 4, 2012State Public Notification received1 linked violation
September 3, 2012State Public Notification received1 linked violation
August 15, 2012State Public Notification requested1 linked violation
August 8, 2012State Violation/Reminder Notice2 linked violations
October 6, 2011State Public Notification requested1 linked violation
October 6, 2011State Public Notification requested1 linked violation
February 8, 2011State Compliance achieved3 linked violations
December 28, 2010State Compliance achieved4 linked violations
November 24, 2010State Violation/Reminder Notice4 linked violations
February 19, 2010State Public Notification requested5 linked violations
February 19, 2010State Administrative/Compliance Order with penalty issued1 linked violation
December 21, 2009State Public Notification received2 linked violations
December 1, 2009State Public Notification requested2 linked violations
December 1, 2009State Violation/Reminder Notice2 linked violations
September 8, 2009State Violation/Reminder Notice3 linked violations
September 2, 2009State Violation/Reminder Notice51 linked violations
August 31, 2009State Compliance achieved1 linked violation
July 30, 2009State Compliance achieved20 linked violations
July 16, 2009State Compliance achieved34 linked violations
December 31, 2007State Compliance achieved4 linked violations
April 4, 2007State Public Notification received2 linked violations
February 26, 2007State Public Notification requested4 linked violations
February 26, 2007State Violation/Reminder Notice4 linked violations
August 16, 2005State Compliance achieved8 linked violations
July 21, 2005State Violation/Reminder Notice3 linked violations
December 23, 2004State Administrative/Compliance Order with penalty issued3 linked violations
June 1, 2004State Compliance achieved4 linked violations
June 30, 2002State Compliance achieved2 linked violations
March 31, 1995State Compliance achieved2 linked violations
March 26, 1993State Compliance achieved9 linked violations
March 25, 1993State Public Notification received5 linked violations
December 31, 1991State Compliance achieved1 linked violation
July 15, 1991State Technical Assistance Visit1 linked violation
April 1, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 31, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record

Contact

MARTIN, LINDA

860-965-6345

COLCHESTER, CT 06415