Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CT1180021
PWS Name	AQUARION-RIDGEFIELD KNOLLS
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	958
County Served	Fairfield

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	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	8645221	Returned to Compliance	30-DEC-2021	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8645220	Returned to Compliance	01-JUL-2018	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	8645219	Open	30-DEC-2015	-	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	8645209	Returned to Compliance	01-JUL-2008	-	Yes
TT	Public Education	Lead and Copper Rule	Lead and Copper Rule	8645109	Returned to Compliance	01-MAR-2008	-	Yes
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	8644608	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	8643707	Returned to Compliance	01-DEC-2006	31-DEC-2006	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	8642805	Returned to Compliance	01-JAN-2005	-	Yes
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	8642205	Returned to Compliance	10-AUG-2004	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8642105	Returned to Compliance	01-JUL-2004	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	8641904	Returned to Compliance	01-JAN-2004	-	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	8641804	Returned to Compliance	01-NOV-2003	30-NOV-2003	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8641704	Returned to Compliance	01-NOV-2003	30-NOV-2003	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8641603	Returned to Compliance	01-JUL-2003	31-JUL-2003	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8641203	Returned to Compliance	01-NOV-2002	30-NOV-2002	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8641103	Returned to Compliance	01-SEP-2002	30-SEP-2002	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8641002	Returned to Compliance	01-JUL-2002	31-JUL-2002	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	41101	Returned to Compliance	01-FEB-2001	28-FEB-2001	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	56500	Returned to Compliance	01-AUG-2000	31-AUG-2000	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	30100	Returned to Compliance	01-JUN-2000	30-JUN-2000	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	44099	Returned to Compliance	01-JUL-1999	31-JUL-1999	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	4399	Returned to Compliance	01-OCT-1998	31-OCT-1998	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	45296	Returned to Compliance	01-AUG-1996	31-AUG-1996	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	98095	Returned to Compliance	01-SEP-1995	30-SEP-1995	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	88795	Returned to Compliance	01-AUG-1995	31-AUG-1995	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	88895	Returned to Compliance	01-AUG-1995	31-AUG-1995	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	23000	Returned to Compliance	01-JUL-1995	-	Yes
Other	Notification, State	Total Coliform Rule	Coliform (TCR)	54695	Returned to Compliance	01-JUN-1995	30-JUN-1995	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	54595	Returned to Compliance	01-JUN-1995	30-JUN-1995	Yes
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	23096	Known	01-JAN-1995	25-JUL-2000	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	3494	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	794	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	894	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	1094	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	1294	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	1394	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	1494	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	1594	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	1694	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	1794	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	1894	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	2094	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	2194	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	2294	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	2394	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	2794	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	4194	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	594	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	694	Returned to Compliance	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	294	Returned to Compliance	01-JAN-1993	31-DEC-1993	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
4020820	8645221	SOX	State Compliance achieved	21-JAN-2022	State	Lead Consumer Notice received
4020818	8645220	SIA	State Violation/Reminder Notice	16-JAN-2019	State	-
4020816	8645219	SIA	State Violation/Reminder Notice	22-MAY-2017	State	-
4020609	8644608	SIF	State Public Notification received	24-APR-2009	State	-
4020809	8645209	SOX	State Compliance achieved	23-JAN-2009	State	-
4020709	8645109	SOX	State Compliance achieved	12-JAN-2009	State	-
4018107	8643707	SOX	State Compliance achieved	30-JAN-2007	State	Results received
4017607	8642805	SOX	State Compliance achieved	31-DEC-2006	State	2 consecutive rounds of acceptable 90% result
4016205	8641904	SIF	State Public Notification received	29-NOV-2004	State	-
4016405	8642105	SOX	State Compliance achieved	15-NOV-2004	State	CCR-COMPLETED
4016405	8642205	SOX	State Compliance achieved	15-NOV-2004	State	CCR-COMPLETED
4015604	8641704	SOX	State Compliance achieved	01-JUL-2004	State	-
4015604	8641603	SOX	State Compliance achieved	01-JUL-2004	State	-
4015404	8641804	SOX	State Compliance achieved	15-JUN-2004	State	-
4018903	8641203	SOX	State Compliance achieved	30-JUN-2003	State	RTC
4018903	8641103	SOX	State Compliance achieved	30-JUN-2003	State	RTC
4018903	8641002	SOX	State Compliance achieved	30-JUN-2003	State	RTC
129601	41101	SFM	State Administrative Penalty assessed	18-JUN-2001	State	-
4018701	30100	SOX	State Compliance achieved	31-MAR-2001	State	RTC
4018701	56500	SOX	State Compliance achieved	31-MAR-2001	State	RTC
133000	23000	SOX	State Compliance achieved	25-JUL-2000	State	-
87500	44099	SOX	State Compliance achieved	13-JUN-2000	State	-
86999	4399	SOX	State Compliance achieved	26-MAY-1999	State	-
4018697	45296	SOX	State Compliance achieved	31-MAR-1997	State	RTC
29497	88795	SOX	State Compliance achieved	22-JAN-1997	State	-
93696	98095	SOX	State Compliance achieved	09-FEB-1996	State	-
71296	54595	SOX	State Compliance achieved	08-FEB-1996	State	-
105295	88895	SOX	State Compliance achieved	15-SEP-1995	State	-
88295	54695	SOX	State Compliance achieved	18-JUL-1995	State	-
141594	5194	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5294	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5394	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5494	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5594	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5694	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5794	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5894	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	5094	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	4794	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	4694	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	4594	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	4194	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	3494	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	2994	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	2794	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	2394	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	2294	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	2194	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	2094	SOX	State Compliance achieved	11-MAR-1994	State	-
141594	1894	SOX	State Compliance achieved	11-MAR-1994	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 3	27320	Yes	Well	Ground water	Emergency	Inactive
WELL 7	53808	Yes	Well	Ground water	Permanent	Active
WELL 1(NEW)	28081	Yes	Well	Ground water	Permanent	Active
WELL 5	27322	Yes	Well	Ground water	Permanent	Active
WELL 2	27319	Yes	Well	Ground water	Permanent	Active
WELL 1 (OLD)	27318	Yes	Well	Ground water	Permanent	Active
WELL 4	27321	Yes	Well	Ground water	Emergency	Inactive
DISTRIBUTION SYSTEM	23351	No	Distribution System/Zone	-	-	Active
PUMP STATION	58447	No	Pump Facility	-	-	Active
ENTRY POINT	38113	No	Sampling Station	-	-	Active
ATMOSPHERIC TANK	53688	No	Storage	-	-	Active
RIDGEFIELD KNOLLS TREATMENT PLANT	36507	No	Treatment Plant	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
RIDGEFIELD KNOLLS TREATMENT PLANT	36507	Inhibitor, Orthophosphate	Corrosion control
RIDGEFIELD KNOLLS TREATMENT PLANT	36507	Hypochlorination, Post	Disinfection

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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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