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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.

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Violations

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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
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	5174613	Open	02-JUL-2025	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	5174612	Open	07-JAN-2022	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	5174610	Open	09-JAN-2020	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	5174402	Returned to Compliance	01-JAN-2002	30-JUN-2002	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1068596	Returned to Compliance	01-JUN-1996	30-JUN-1996	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1068496	Returned to Compliance	01-MAY-1996	31-MAY-1996	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1068396	Returned to Compliance	01-APR-1996	30-APR-1996	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1068296	Returned to Compliance	01-MAR-1996	31-MAR-1996	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1068196	Returned to Compliance	01-FEB-1996	29-FEB-1996	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1068096	Returned to Compliance	01-JAN-1996	31-JAN-1996	Yes

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Enforcement Actions

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
1082208	5174613	SIE	State Public Notification requested	21-OCT-2025	State	-
1082206	5174612	SIA	State Violation/Reminder Notice	07-JAN-2022	State	-
1082204	5174610	SIA	State Violation/Reminder Notice	09-JAN-2020	State	-
82102	5174402	SIA	State Violation/Reminder Notice	21-AUG-2002	State	-
1997	1068496	SOX	State Compliance achieved	10-SEP-1997	State	-
1997	1068396	SOX	State Compliance achieved	10-SEP-1997	State	-
1997	1068296	SOX	State Compliance achieved	10-SEP-1997	State	-
1997	1068196	SOX	State Compliance achieved	10-SEP-1997	State	-
1997	1068596	SOX	State Compliance achieved	10-SEP-1997	State	-
1997	1068096	SOX	State Compliance achieved	10-SEP-1997	State	-

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
ANSONIA, VILLAGE OF WELL 0003	11304	Yes	Well	Ground water	Permanent	Active
ANSONIA, VILLAGE OF WELL 0W01	11308	Yes	Well	Ground water	Permanent	Inactive
ANSONIA, VILLAGE OF WELL 0E01	11307	Yes	Well	Ground water	Permanent	Inactive
ANSONIA, VILLAGE OF WELL 0005	11306	Yes	Well	Ground water	Permanent	Active
ANSONIA, VILLAGE OF WELL 0004	11305	Yes	Well	Ground water	Permanent	Active
CLEARWELL	34437	No	Clear Well	-	-	Inactive
ANSONIA, VILLAGE OF DISTRIBUTION	24208	No	Distribution System/Zone	-	-	Active
HIGH SERVICE PUMP 1	34440	No	Pump Facility	-	-	Active
HIGH SERVICE PUMP 2	34441	No	Pump Facility	-	-	Active
Ansonia, Village Of P01	84637	No	Sampling Station	-	-	Inactive
WINBIGLAR ELEVATED TANK	34435	No	Storage	-	-	Active
3RD STREET TANK	34439	No	Storage	-	-	Active
CLEARWELL	46156	No	Storage	-	-	Active
ANSONIA VILLAGE	2570	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
ANSONIA VILLAGE	2570	Inhibitor, Polyphosphate	Corrosion control
ANSONIA VILLAGE	2570	Hypochlorination, Post	Disinfection
ANSONIA VILLAGE	2570	Filtration, Pressure Sand	Iron removal
ANSONIA VILLAGE	2570	Aeration, Slat Tray	Iron removal
ANSONIA VILLAGE	2570	Innovative	Iron removal
ANSONIA VILLAGE	2570	Sequestration	Iron removal

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