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PWS ID	CT0570011
PWS Name	AQUARION-GREENWICH
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	53297
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	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	8714129	Returned to Compliance	01-JUN-2024	30-JUN-2024	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	8714123	Returned to Compliance	30-DEC-2019	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	8714115	Returned to Compliance	01-NOV-2018	30-NOV-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	8714114	Returned to Compliance	01-NOV-2018	30-NOV-2018	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8714064	Returned to Compliance	01-JUL-2018	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	8714100	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	8714071	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	8714086	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	8714090	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	8714091	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	8714070	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	8714111	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	8714108	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	8714107	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	8714106	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	8714105	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	8714103	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	8714101	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	8714099	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	8714098	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	8714097	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	8714096	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	8714095	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	8714093	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	8714092	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	8714008	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	8714007	Returned to Compliance	01-JUN-2009	30-JUN-2009	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8714006	Returned to Compliance	01-JUL-2006	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrite	116293	Returned to Compliance	01-JAN-1993	31-MAR-1993	No
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Fluoride	12080	Known	31-OCT-1979	30-NOV-1979	Yes

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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
157926	8714129	SIF	State Public Notification received	01-JUL-2025	State	-
157922	8714114	SOX	State Compliance achieved	04-MAR-2020	State	Results received
157922	8714115	SOX	State Compliance achieved	04-MAR-2020	State	Results received
157921	8714098	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714111	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714108	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714107	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714106	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714105	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714070	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714071	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714086	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714090	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714091	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714092	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714093	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714095	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714096	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714097	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714099	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714100	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714101	SIF	State Public Notification received	25-FEB-2020	State	-
157921	8714103	SIF	State Public Notification received	25-FEB-2020	State	-
157920	8714123	SOX	State Compliance achieved	16-JAN-2020	State	-
157907	8714064	SIA	State Violation/Reminder Notice	16-JAN-2019	State	-
157897	8714008	SIE	State Public Notification requested	02-DEC-2014	State	-
157888	8714007	SIF	State Public Notification received	10-AUG-2009	State	-
157707	8714006	SIA	State Violation/Reminder Notice	13-OCT-2006	State	-
157493	116293	SOX	State Compliance achieved	30-SEP-1993	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTERCONNECTION - CT1350011 - HAVEMEYER	48563	Yes	Consecutive Connection	Surface water	Permanent	Active
BARGH RESERVOIR	32546	Yes	Reservoir	Surface water	Permanent	Active
BRUSH RESERVOIR	32545	Yes	Reservoir	Surface water	Permanent	Active
ROCKWOOD LAKE RESERVOIR	32543	Yes	Reservoir	Surface water	Permanent	Active
PUTNAM LAKE RESERVOIR	32542	Yes	Reservoir	Surface water	Permanent	Active
CONVERSE LAKE	32727	Yes	Reservoir	Surface water	Emergency	Active
MIANUS POND	21073	Yes	Intake	Surface water	Permanent	Active
PUTNAM LAKE RSVR	21072	Yes	Intake	Surface water	Permanent	Active
INTERCONNECTION - CT1350011 -PALMER HILL	61583	Yes	Consecutive Connection	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	21079	No	Distribution System/Zone	-	-	Active
CONVERSE POND BK DIV	32544	No	Other	-	-	Active
MIANUS MILL POND	32547	No	Other	-	-	Active
RAW SURFACE WATER ENTRY POINT - MIANUS	46212	No	Other	-	-	Inactive
RIDGE AVE PUMP STATION	49504	No	Pump Facility	-	-	Active
PUTNUM H.S. PUMP STATION	49506	No	Pump Facility	-	-	Active
PUTNUM PUMP STATION	49508	No	Pump Facility	-	-	Active
HAVEMEYER LANE PUMP STATION	49510	No	Pump Facility	-	-	Active
MIANUS PLANT PUMP STATION	49512	No	Pump Facility	-	-	Active
GLENVILLE PUMP STATION	57324	No	Pump Facility	-	-	Active
ANDERSON ROAD PUMP STATION	60676	No	Pump Facility	-	-	Active
ANDERSON ROAD PUMP STATION	49502	No	Pump Facility	-	-	Inactive
ENTRY POINT - PUTNAM TREATMENT PLANT	38627	No	Sampling Station	-	-	Active
ENTRY POINT - MIANUS TREATMENT PLANT	46210	No	Sampling Station	-	-	Active
RAW SURFACE WATER ENTRY POINT - PUTNAM	46211	No	Sampling Station	-	-	Inactive
PUTNAM EAST CLEARWELL	37131	No	Storage	-	-	Active
PUTNAM HIGH SERVICE TANK	37133	No	Storage	-	-	Active
MIANUS CLEARWELL	37135	No	Storage	-	-	Active
KING STREET TANK	37137	No	Storage	-	-	Active
PUTNAM WEST CLEARWELL	59127	No	Storage	-	-	Active
PUTNAM LAKE FILTER PLANT	36318	No	Treatment Plant	-	-	Active
MIANUS RIVER FILTER PLANT	36319	No	Treatment Plant	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
PUTNAM LAKE FILTER PLANT	36318	Filtration, Rapid Sand	Particulate removal
PUTNAM LAKE FILTER PLANT	36318	Permanganate	Taste / odor control
PUTNAM LAKE FILTER PLANT	36318	Coagulation	Particulate removal
PUTNAM LAKE FILTER PLANT	36318	Gaseous Chlorination, Post	Disinfection
PUTNAM LAKE FILTER PLANT	36318	pH Adjustment, Post	Corrosion control
PUTNAM LAKE FILTER PLANT	36318	Inhibitor, Orthophosphate	Corrosion control
PUTNAM LAKE FILTER PLANT	36318	Fluoridation	Other
PUTNAM LAKE FILTER PLANT	36318	Activated Carbon, Powdered	Taste / odor control
PUTNAM LAKE FILTER PLANT	36318	Lime - Soda Ash Addition	Softening (hardness removal)
PUTNAM LAKE FILTER PLANT	36318	Chlorine Dioxide	Disinfection
PUTNAM LAKE FILTER PLANT	36318	Hypochlorination, Post	Disinfection
PUTNAM LAKE FILTER PLANT	36318	Sedimentation	Particulate removal
MIANUS RIVER FILTER PLANT	36319	Activated Carbon, Powdered	Taste / odor control
MIANUS RIVER FILTER PLANT	36319	Coagulation	Particulate removal
MIANUS RIVER FILTER PLANT	36319	Filtration, Rapid Sand	Particulate removal
MIANUS RIVER FILTER PLANT	36319	pH Adjustment, Post	Corrosion control
MIANUS RIVER FILTER PLANT	36319	Inhibitor, Orthophosphate	Corrosion control
MIANUS RIVER FILTER PLANT	36319	Fluoridation	Other
MIANUS RIVER FILTER PLANT	36319	Lime - Soda Ash Addition	Softening (hardness removal)
MIANUS RIVER FILTER PLANT	36319	Hypochlorination, Post	Disinfection
MIANUS RIVER FILTER PLANT	36319	Hypochlorination, Pre	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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