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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
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	830026	Returned to Compliance	01-NOV-2024	30-NOV-2024	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	830025	Returned to Compliance	25-OCT-2021	-	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	830023	Returned to Compliance	01-JUL-2021	31-JUL-2021	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	830024	Returned to Compliance	01-JUL-2021	31-JUL-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	830022	Returned to Compliance	01-JAN-2016	31-MAR-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	830020	Returned to Compliance	01-OCT-2015	31-DEC-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	830021	Returned to Compliance	01-OCT-2015	31-DEC-2015	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	830019	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	830018	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	830014	Returned to Compliance	01-JAN-2011	-	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	101	Returned to Compliance	01-MAR-2001	31-MAR-2001	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	826693	Returned to Compliance	01-AUG-1993	31-AUG-1993	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	120993	Known	01-DEC-1992	31-DEC-1992	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
523	830026	SIF	State Public Notification received	19-AUG-2025	State	-
519	830024	SIF	State Public Notification received	01-MAR-2022	State	-
518	830025	SOX	State Compliance achieved	28-FEB-2022	State	PN received. MGM 3/1/2022;
516	830023	SIF	State Public Notification received	31-JAN-2022	State	-
508	830018	SOX	State Compliance achieved	31-OCT-2016	State	RTC per EPA Policy SEH 10/31/16;
508	830020	SOX	State Compliance achieved	31-OCT-2016	State	RTC per EPA Policy SEH 10/31/16;
508	830019	SOX	State Compliance achieved	31-OCT-2016	State	RTC per EPA Policy SEH 10/31/16;
508	830022	SOX	State Compliance achieved	31-OCT-2016	State	RTC per EPA Policy SEH 10/31/16;
508	830021	SOX	State Compliance achieved	31-OCT-2016	State	RTC per EPA Policy SEH 10/31/16;
494	830014	SOX	State Compliance achieved	25-NOV-2014	State	-
509	101	SOX	State Compliance achieved	31-MAY-2001	State	SOX per EPA RTC policy. MGM 2/3/2021;
509	826693	SOX	State Compliance achieved	31-MAY-2001	State	SOX per EPA RTC policy. MGM 2/3/2021;
293	120993	SIE	State Public Notification requested	19-FEB-1993	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
CC 2 RATHBUN REG WTR ASSOCIATION MO	108827	Yes	Consecutive Connection	Surface water	Permanent	Active
LAKE THUNDERHEAD	84769	Yes	Reservoir	Surface water	Emergency	Inactive
UNIONVILLE LAKE (LAKE MAHONEY)	84767	Yes	Reservoir	Surface water	Emergency	Inactive
LAKE THUNDERHEAD	84770	Yes	Intake	Surface water	Emergency	Inactive
UNIONVILLE LAKE (LAKE MAHONEY)	84768	Yes	Intake	Surface water	Emergency	Inactive
CC 1 RATHBUN REG WTR ASSOC IA0400900	108532	Yes	Consecutive Connection	Surface water	Permanent	Inactive
DISTRIBUTION SYSTEM	85562	No	Distribution System/Zone	-	-	Active
RRWA PUMP STATION	108604	No	Pump Facility	-	-	Active
RAW WATER PUMP STATION	101723	No	Pump Facility	-	-	Inactive
CHEMICAL SAMPLES	90415	No	Sampling Station	-	-	Active
WASHINGTON & 15TH ST WATER TOWER	101722	No	Storage	-	-	Active
PLANT CLEARWELL	95304	No	Storage	-	-	Inactive
UNIONVILLE - TREATMENT PLANT	67067	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
UNIONVILLE - TREATMENT PLANT	67067	pH Adjustment, Pre	Corrosion control
UNIONVILLE - TREATMENT PLANT	67067	Permanganate	Organics removal
UNIONVILLE - TREATMENT PLANT	67067	Activated Carbon, Powdered	Organics removal
UNIONVILLE - TREATMENT PLANT	67067	Chloramines	Disinfection by-products control
UNIONVILLE - TREATMENT PLANT	67067	Coagulation	Particulate removal
UNIONVILLE - TREATMENT PLANT	67067	Rapid Mix	Particulate removal
UNIONVILLE - TREATMENT PLANT	67067	Flocculation	Particulate removal
UNIONVILLE - TREATMENT PLANT	67067	Sedimentation	Particulate removal
UNIONVILLE - TREATMENT PLANT	67067	Lime - Soda Ash Addition	Corrosion control
UNIONVILLE - TREATMENT PLANT	67067	Gaseous Chlorination, Pre	Disinfection
UNIONVILLE - TREATMENT PLANT	67067	Fluoridation	Other
UNIONVILLE - TREATMENT PLANT	67067	Filtration, Rapid Sand	Particulate removal
UNIONVILLE - TREATMENT PLANT	67067	Gaseous Chlorination, Post	Disinfection

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