Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CT0600041
PWS Name	QUONNIPAUG HILLS - MAIN SYSTEM
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	564
County Served	New Haven

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513604	Returned to Compliance	01-JAN-2025	31-JAN-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	8513541	Returned to Compliance	01-JUL-2019	30-SEP-2019	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	8513486	Returned to Compliance	10-MAR-2019	-	No
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513480	Returned to Compliance	01-FEB-2019	28-FEB-2019	No
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513483	Returned to Compliance	01-FEB-2019	28-FEB-2019	No
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513484	Returned to Compliance	01-FEB-2019	28-FEB-2019	No
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513485	Returned to Compliance	01-FEB-2019	28-FEB-2019	No
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513481	Returned to Compliance	01-FEB-2019	28-FEB-2019	No
MR	Failure to Conduct Assessment Monitoring	Ground Water Rule	E. COLI	8513482	Returned to Compliance	01-FEB-2019	28-FEB-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	8513525	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	8513524	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	8513523	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	8513522	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	8513521	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	8513519	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	8513518	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	8513517	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	8513516	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	8513512	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	8513497	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	8513526	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	8513527	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	8513529	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	8513496	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	8513532	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	8513533	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	8513534	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	8513537	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	8513540	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	8513531	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	8513436	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	8513477	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	8513474	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	8513473	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	8513472	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	8513471	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	8513469	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	8513467	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	8513466	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	8513465	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	8513464	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	8513463	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	8513462	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	8513461	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	8513459	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	8513458	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	8513457	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	8513456	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	8513452	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	8513437	Returned to Compliance	01-OCT-2018	31-DEC-2018	No

1 - 50 of 115

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
220175	8513604	SIF	State Public Notification received	09-APR-2025	State	-
220171	8513542	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513543	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513601	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513544	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513545	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513546	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513547	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513549	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513550	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513551	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513552	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513553	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513557	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513558	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513559	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513560	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513561	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513562	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513563	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513566	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513567	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513569	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513570	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513571	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513572	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513573	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513575	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513579	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513580	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513581	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513583	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513586	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513587	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513588	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513589	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513590	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513591	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513592	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513593	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513594	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513595	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513596	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513597	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513598	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513599	SIF	State Public Notification received	19-JAN-2023	State	-
220171	8513600	SIF	State Public Notification received	19-JAN-2023	State	-
220170	8511904	SO6	State Intentional no-action	05-JAN-2023	State	"EPA allowed all PN's before January 1, 2010 to be closed out with no action required"
220170	8512104	SO6	State Intentional no-action	05-JAN-2023	State	"EPA allowed all PN's before January 1, 2010 to be closed out with no action required"
220169	8513541	SIF	State Public Notification received	18-NOV-2020	State	-

1 - 50 of 115

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTERCONNECTION - UPPER SYSTEM	53263	Yes	Consecutive Connection	Ground water	Permanent	Inactive
WELL 6	57768	Yes	Well	Ground water	Permanent	Active
WELL 5	57767	Yes	Well	Ground water	Permanent	Active
WELL 4B	27182	Yes	Well	Ground water	Permanent	Active
WELL 4	27180	Yes	Well	Ground water	Permanent	Active
WELL 3	27179	Yes	Well	Ground water	Permanent	Active
WELL 2	27178	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	21196	No	Distribution System/Zone	-	-	Active
BOOSTER PUMPING FACILITIES - LOWER	53225	No	Pump Facility	-	-	Active
UPPER PUMPHOUSE BOOSTERS	57772	No	Pump Facility	-	-	Active
ENTRY POINT - LOWER	38595	No	Sampling Station	-	-	Active
ENTRY POINT - UPPER	57769	No	Sampling Station	-	-	Active
WELL 4B ENTRY POINT	53223	No	Sampling Station	-	-	Inactive
ATMOSPHERIC TANK - LOWER	50066	No	Storage	-	-	Active
ATMOSPHERIC TANK - UPPER	57770	No	Storage	-	-	Active
HYDROPNEUMATIC TANK - UPPER	57771	No	Storage	-	-	Active
HYDROPNEUMATIC TANK - LOWER	50068	No	Storage	-	-	Inactive
TREATMENT PLANT - UPPER	58372	No	Treatment Plant	-	-	Active
TREATMENT PLANT - LOWER	58374	No	Treatment Plant	-	-	Active

1 - 19 of 19

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT - UPPER	58372	Hypochlorination, Post	Disinfection
TREATMENT PLANT - UPPER	58372	Sequestration	Iron removal
TREATMENT PLANT - UPPER	58372	Sequestration	Manganese removal
TREATMENT PLANT - UPPER	58372	Inhibitor, Polyphosphate	Corrosion control
TREATMENT PLANT - LOWER	58374	Hypochlorination, Post	Disinfection
TREATMENT PLANT - LOWER	58374	Sequestration	Iron removal
TREATMENT PLANT - LOWER	58374	Sequestration	Manganese removal
TREATMENT PLANT - LOWER	58374	Inhibitor, Polyphosphate	Corrosion control

1 - 8 of 8

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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