BRANFORD, CT · New Haven County

QUONNIPAUG HILLS - MAIN SYSTEM 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): CT0600041
System type: Community Water System
Population served: 564
Service connections: 187
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Failure to Conduct Assessment Monitoring
—
E. COLI
January 1, 2025 – January 31, 2025
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2019 – August 31, 2019
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
February 1, 2019 – February 28, 2019
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
February 1, 2019 – February 28, 2019
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
February 1, 2019 – February 28, 2019
Resolved
Failure to Conduct Assessment Monitoring
—
E. COLI
February 1, 2019 – February 28, 2019
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2019 – March 31, 2019
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Styrene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Toluene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Benzene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2019 – March 31, 2019
Resolved
Monitoring, Regular
—
Trichloroethylene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
Tetrachloroethylene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
CHLOROBENZENE
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
Vinyl chloride
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
Carbon tetrachloride
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
LASSO
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Diquat
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Barium
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Mercury
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Nickel
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Selenium
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2017 – December 31, 2019
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2017 – December 31, 2019
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2016 – August 15, 2016
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – July 21, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2011 – October 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2011 – August 31, 2011
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 14, 2011 – July 12, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2011 – July 31, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2011 – June 30, 2011
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2009 – October 15, 2009
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2008 – December 17, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2007 – February 28, 2007
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2006 – December 31, 2006
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
October 9, 2004 – November 30, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2004 – August 31, 2004
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 31, 2004 – January 5, 2023
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
January 1, 2025 – January 31, 2025	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
July 1, 2019 – August 31, 2019	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
February 1, 2019 – February 28, 2019	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
February 1, 2019 – February 28, 2019	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
February 1, 2019 – February 28, 2019	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
February 1, 2019 – February 28, 2019	Failure to Conduct Assessment Monitoring	E. COLI	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Styrene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Toluene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Benzene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2019 – March 31, 2019	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	Trichloroethylene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	Tetrachloroethylene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	CHLOROBENZENE	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	Vinyl chloride	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	Carbon tetrachloride	—	Resolved
October 1, 2018 – December 31, 2018	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	LASSO	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Diquat	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Barium	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Mercury	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Nickel	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Selenium	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2017 – December 31, 2019	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
August 10, 2016 – August 15, 2016	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2014 – July 21, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 2013 – June 30, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2011 – October 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2011 – August 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 14, 2011 – July 12, 2011	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2011 – July 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 2011 – June 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 10, 2009 – October 15, 2009	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
August 10, 2008 – December 17, 2008	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
February 1, 2007 – February 28, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
December 1, 2006 – December 31, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 9, 2004 – November 30, 2004	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 1, 2004 – August 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 31, 2004 – January 5, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved

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

Enforcement actions

April 9, 2025State Public Notification received1 linked violation
March 14, 2025State Public Notification requested1 linked violation
March 14, 2025State Violation/Reminder Notice1 linked violation
February 28, 2025State Compliance achieved1 linked violation
January 19, 2023State Public Notification received46 linked violations
January 5, 2023State Intentional no-action2 linked violations
November 24, 2020State Compliance achieved46 linked violations
November 18, 2020State Public Notification received1 linked violation
May 11, 2020State Violation/Reminder Notice46 linked violations
May 11, 2020State Public Notification requested46 linked violations
January 30, 2020State Public Notification requested1 linked violation
January 30, 2020State Violation/Reminder Notice1 linked violation
December 31, 2019State Public Notification received28 linked violations
August 31, 2019State Compliance achieved1 linked violation
August 21, 2019State Compliance achieved1 linked violation
June 11, 2019State Public Notification requested28 linked violations
April 10, 2019State Compliance achieved21 linked violations
April 1, 2019State Compliance achieved20 linked violations
March 31, 2019State Compliance achieved7 linked violations
March 14, 2019State Violation/Reminder Notice21 linked violations
August 15, 2016State Compliance achieved1 linked violation
February 4, 2015State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 14, 2015State Violation/Reminder Notice1 linked violation
July 21, 2014State Compliance achieved1 linked violation
September 3, 2013State Violation/Reminder Notice1 linked violation
August 7, 2013State Compliance achieved1 linked violation
December 6, 2012State Public Notification received1 linked violation
August 3, 2012State Bilateral Compliance Agreement signed4 linked violations
November 30, 2011State Compliance achieved1 linked violation
November 21, 2011State Public Notification requested1 linked violation
November 21, 2011State Violation/Reminder Notice1 linked violation
September 30, 2011State Compliance achieved3 linked violations
September 21, 2011State Public Notification received1 linked violation
September 7, 2011State Violation/Reminder Notice1 linked violation
September 7, 2011State Public Notification requested1 linked violation
August 26, 2011State Public Notification received1 linked violation
July 25, 2011State Violation/Reminder Notice1 linked violation
July 25, 2011State Public Notification requested1 linked violation
July 12, 2011State Compliance achieved1 linked violation
July 12, 2011State Compliance achieved1 linked violation
July 12, 2011State Public Notification received1 linked violation
June 13, 2011State Public Notification requested1 linked violation
June 13, 2011State Violation/Reminder Notice1 linked violation
October 15, 2009State Compliance achieved1 linked violation
September 17, 2009State Violation/Reminder Notice1 linked violation
January 10, 2007State Public Notification received3 linked violations
December 27, 2006State Violation/Reminder Notice1 linked violation
September 29, 2004State Violation/Reminder Notice3 linked violations
June 30, 2004State Public Notification requested1 linked violation
June 30, 1996State Compliance achieved5 linked violations

Contact

KRYGIER, WILLIAM P.

203-488-9500

BRANFORD, CT 06405