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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
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	4071418	Returned to Compliance	01-JUL-2023	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4071407	Returned to Compliance	01-DEC-2018	31-DEC-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	4071410	Known	01-OCT-2018	31-DEC-2018	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	4071406	Returned to Compliance	01-JUL-2006	-	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	32895	Returned to Compliance	01-MAR-1995	31-MAR-1995	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	32795	Returned to Compliance	01-FEB-1995	28-FEB-1995	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	32695	Returned to Compliance	01-JAN-1995	31-JAN-1995	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	20095	Returned to Compliance	01-DEC-1994	31-DEC-1994	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	5495	Returned to Compliance	01-NOV-1994	30-NOV-1994	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	4070391	Returned to Compliance	01-SEP-1991	30-SEP-1991	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	4068191	Returned to Compliance	01-SEP-1991	30-SEP-1991	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	4069291	Returned to Compliance	01-SEP-1991	29-OCT-1991	No

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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
1005	4071418	SOX	State Compliance achieved	10-JUL-2023	State	2022 CCR completed
998	4071407	SOX	State Compliance achieved	17-MAY-2019	State	Results Received
607	4071406	SIA	State Violation/Reminder Notice	17-OCT-2006	State	-
406	4070391	SOX	State Compliance achieved	31-MAR-2006	State	RTC
406	4069291	SOX	State Compliance achieved	31-MAR-2006	State	RTC
406	4068191	SOX	State Compliance achieved	31-MAR-2006	State	RTC
995	32795	SOX	State Compliance achieved	30-APR-1995	State	RTC
995	32695	SOX	State Compliance achieved	30-APR-1995	State	RTC
995	20095	SOX	State Compliance achieved	30-APR-1995	State	RTC
995	5495	SOX	State Compliance achieved	30-APR-1995	State	RTC
995	32895	SOX	State Compliance achieved	30-APR-1995	State	RTC

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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
WILLIMANTIC RESERVOIR PUMP HOUSE	37317	Yes	Intake	Surface water	Permanent	Active
WILLIMANTIC RESERVOIR	32695	Yes	Reservoir	Surface water	Permanent	Active
MANSFIELD HOLLOW RESERVOIR	32694	Yes	Reservoir	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	24463	No	Distribution System/Zone	-	-	Active
QUARRY STREET PUMP STATION	49308	No	Pump Facility	-	-	Active
HIGH ST PUMP STATION	49310	No	Pump Facility	-	-	Active
PEMBERTON PUMP STATION	49312	No	Pump Facility	-	-	Active
BEECH MOUNTAIN PUMP STATION	49314	No	Pump Facility	-	-	Active
WILLIMANTIC WATER TP - ENTRY POINT	37879	No	Sampling Station	-	-	Active
HOSMER MOUNTAIN RESERVOIR	37311	No	Storage	-	-	Active
PEMBERTON ROAD TANK	37313	No	Storage	-	-	Active
QUARRY STREET TANK	37315	No	Storage	-	-	Active
PLANT CLEARWELL	37319	No	Storage	-	-	Active
PLANT CLEARWELL CONTACT CHAMBER	59627	No	Storage	-	-	Active
WILLIMANTIC WATER PURIFICATION PLANT	36586	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
WILLIMANTIC WATER PURIFICATION PLANT	36586	Flocculation	Particulate removal
WILLIMANTIC WATER PURIFICATION PLANT	36586	Sedimentation	Particulate removal
WILLIMANTIC WATER PURIFICATION PLANT	36586	Filtered	Particulate removal
WILLIMANTIC WATER PURIFICATION PLANT	36586	Inhibitor, Orthophosphate	Corrosion control
WILLIMANTIC WATER PURIFICATION PLANT	36586	Inhibitor, Polyphosphate	Corrosion control
WILLIMANTIC WATER PURIFICATION PLANT	36586	Hypochlorination, Pre	Disinfection
WILLIMANTIC WATER PURIFICATION PLANT	36586	Fluoridation	Other
WILLIMANTIC WATER PURIFICATION PLANT	36586	pH Adjustment, Post	Corrosion control
WILLIMANTIC WATER PURIFICATION PLANT	36586	Hypochlorination, Post	Disinfection
WILLIMANTIC WATER PURIFICATION PLANT	36586	Chlorine Dioxide	Disinfection

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