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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
MCL	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	7148014	Known	01-JUL-2025	31-JUL-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7148010	Returned to Compliance	01-JAN-2008	31-MAR-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7148009	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7148008	Returned to Compliance	01-JUL-2007	30-SEP-2007	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	7147907	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	5150700	Returned to Compliance	01-APR-2000	16-OCT-2000	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	4123098	Known	01-APR-1998	30-APR-1998	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	3904597	Returned to Compliance	23-SEP-1997	31-MAR-1999	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3904497	Returned to Compliance	01-JUL-1997	30-SEP-1997	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	3824897	Known	01-JUN-1997	30-JUN-1997	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	3824797	Known	01-JUN-1997	30-JUN-1997	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3824697	Returned to Compliance	01-APR-1997	30-JUN-1997	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3904397	Returned to Compliance	01-JAN-1997	31-MAR-1997	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3661197	Returned to Compliance	01-OCT-1996	31-DEC-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3549596	Returned to Compliance	01-JUL-1996	30-SEP-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3454096	Returned to Compliance	01-APR-1996	30-JUN-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3388596	Returned to Compliance	01-JAN-1996	31-MAR-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3281596	Returned to Compliance	01-OCT-1995	31-DEC-1995	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2911595	Known	01-FEB-1995	28-FEB-1995	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2911495	Known	01-JAN-1995	31-JAN-1995	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2795495	Known	01-NOV-1994	30-NOV-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1407392	Known	01-NOV-1991	30-NOV-1991	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7144280	Known	30-JUN-1977	29-JUN-1981	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
7888931	7148014	SIE	State Public Notification requested	16-OCT-2025	State	-
7888922	7148010	SIF	State Public Notification received	30-MAY-2008	State	-
7888917	7148009	SIF	State Public Notification received	28-FEB-2008	State	-
7888916	7148008	SOX	State Compliance achieved	03-JAN-2008	State	system was re-VN'd RAA went over MCL for combined radium ion exchange had already been installed and systems response was that they made the necessary adjustments - next sample result was 5.0 entered SOX on date of CCA
7888507	7147907	SIA	State Violation/Reminder Notice	12-OCT-2006	State	-
480601	5150700	SOX	State Compliance achieved	05-JAN-2001	State	-
7888399	3904597	SOX	State Compliance achieved	03-MAR-1999	State	-
7199998	4123098	SIE	State Public Notification requested	27-JUN-1998	State	-
20398	3904397	EFJ	Federal issued Formal Notice of Violation	29-APR-1998	ODSWeb	AH
20398	3661197	EFJ	Federal issued Formal Notice of Violation	29-APR-1998	ODSWeb	AH
20398	3824697	EFJ	Federal issued Formal Notice of Violation	29-APR-1998	ODSWeb	AH
20398	3904497	EFJ	Federal issued Formal Notice of Violation	29-APR-1998	ODSWeb	AH
6664497	3281596	SOX	State Compliance achieved	19-SEP-1997	State	-
6665997	3824797	SIE	State Public Notification requested	30-AUG-1997	State	-
6665997	3824897	SIE	State Public Notification requested	30-AUG-1997	State	-
6664697	3388596	SOX	State Compliance achieved	19-AUG-1997	State	-
6664697	3454096	SOX	State Compliance achieved	19-AUG-1997	State	-
6664697	3549596	SOX	State Compliance achieved	19-AUG-1997	State	-
4515995	2911595	SIE	State Public Notification requested	04-MAY-1995	State	-
4205295	2911495	SIE	State Public Notification requested	30-MAR-1995	State	-
4205095	2795495	SIF	State Public Notification received	20-MAR-1995	State	-
1186292	1407392	SIF	State Public Notification received	30-JAN-1992	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 08-EMERG CONNECT WITH LK IN THE HILLS	32657	Yes	Consecutive Connection	Ground water	Emergency	Active
WELL 11 (01731)	34502	Yes	Well	Ground water	Permanent	Active
WELL 9 (01249)	19041	Yes	Well	Ground water	Permanent	Active
WELL 10 (01201)	18995	Yes	Well	Ground water	Permanent	Active
WELL 8 (01139)	18934	Yes	Well	Ground water	Permanent	Active
WELL 7 (00839)	18645	Yes	Well	Ground water	Permanent	Active
WELL 12 (01852) INACTIVE -WASNEVERBUILT	35470	Yes	Well	Ground water	Other	Inactive
WELL 6 (20205) ABANDONED	19920	Yes	Well	Ground water	Other	Inactive
WELL 5 (20204) ABANDONED	19919	Yes	Well	Ground water	Other	Inactive
WELL 4 (20203) ABANDONED	19918	Yes	Well	Ground water	Other	Inactive
HUNTLEY	24405	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	44915	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	44916	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	28064	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30486	No	Sampling Station	-	-	Active
ELEV1 - 300,000GAL ELEVATED TANK	11458	No	Storage	-	-	Active
ELEV2 - 1MG ELEVATED TANK	46825	No	Storage	-	-	Active
ELEV3 - 500,000GAL ELEVATED TANK	46826	No	Storage	-	-	Active
ELEV4 - 1MG ELEVATED TANK	46827	No	Storage	-	-	Active
ELEV5 - 400,000GAL ELEVATED TANK	46828	No	Storage	-	-	Active
TAP 06 GROUND STORAGE	32662	No	Storage	-	-	Inactive
TP 04-ION-EXCHANGE PLANT FOR WELL 7	16483	No	Treatment Plant	-	-	Active
TP 05-ION-EXCHANGE PLANT FOR WELL 8	16484	No	Treatment Plant	-	-	Active
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	No	Treatment Plant	-	-	Active
TP 07-ION EXCHANGE PLANT FOR WELL 10	32661	No	Treatment Plant	-	-	Active
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	No	Treatment Plant	-	-	Active
TP 01-WELL 4	16480	No	Treatment Plant	-	-	Inactive
TP 02-WELL 5 TREATED W/ PHOS, FLUO CL2	16481	No	Treatment Plant	-	-	Inactive
TP 03-WELL 6	16482	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 04-ION-EXCHANGE PLANT FOR WELL 7	16483	Inhibitor, Polyphosphate	Corrosion control
TP 04-ION-EXCHANGE PLANT FOR WELL 7	16483	Fluoridation	Other
TP 04-ION-EXCHANGE PLANT FOR WELL 7	16483	Gaseous Chlorination, Post	Disinfection
TP 04-ION-EXCHANGE PLANT FOR WELL 7	16483	Ion Exchange	Radionuclides removal
TP 05-ION-EXCHANGE PLANT FOR WELL 8	16484	Fluoridation	Other
TP 05-ION-EXCHANGE PLANT FOR WELL 8	16484	Inhibitor, Polyphosphate	Corrosion control
TP 05-ION-EXCHANGE PLANT FOR WELL 8	16484	Ion Exchange	Radionuclides removal
TP 05-ION-EXCHANGE PLANT FOR WELL 8	16484	Gaseous Chlorination, Post	Disinfection
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	Inhibitor, Polyphosphate	Corrosion control
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	Aeration, Slat Tray	Taste / odor control
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	Gaseous Chlorination, Pre	Taste / odor control
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	Fluoridation	Other
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	Ion Exchange	Radionuclides removal
TP 06-ION-EXCHANGE PLANT FOR WELL 9	32334	Gaseous Chlorination, Post	Disinfection
TP 07-ION EXCHANGE PLANT FOR WELL 10	32661	Inhibitor, Polyphosphate	Corrosion control
TP 07-ION EXCHANGE PLANT FOR WELL 10	32661	Gaseous Chlorination, Pre	Taste / odor control
TP 07-ION EXCHANGE PLANT FOR WELL 10	32661	Fluoridation	Other
TP 07-ION EXCHANGE PLANT FOR WELL 10	32661	Ion Exchange	Radionuclides removal
TP 07-ION EXCHANGE PLANT FOR WELL 10	32661	Gaseous Chlorination, Post	Disinfection
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	Gaseous Chlorination, Pre	Disinfection
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	Ion Exchange	Radionuclides removal
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	Ion Exchange	Inorganics removal
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	Fluoridation	Other
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	Gaseous Chlorination, Post	Disinfection
TP 09- ION EXCHANGE PLANT FOR WELL 11	35142	Inhibitor, Polyphosphate	Corrosion control

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