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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 Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	4310309	Open	01-JUL-2025	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	4310308	Returned to Compliance	01-OCT-2023	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	4310307	Returned to Compliance	01-JUL-2018	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4310205	Returned to Compliance	10-AUG-2005	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4310305	Returned to Compliance	10-AUG-2005	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	4310005	Returned to Compliance	01-JUL-2004	31-DEC-2004	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	4309904	Returned to Compliance	01-JAN-2004	30-JUN-2004	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	4309099	Returned to Compliance	01-OCT-1998	31-DEC-1998	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	4308998	Returned to Compliance	01-JUL-1998	30-SEP-1998	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	3976097	Returned to Compliance	01-JAN-1998	-	No
TT	Public Education	Lead and Copper Rule	Lead and Copper Rule	3264795	Returned to Compliance	01-JAN-1995	-	Yes
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	1960393	Returned to Compliance	04-FEB-1993	-	Yes
TT	Public Education	Lead and Copper Rule	Lead and Copper Rule	2228693	Returned to Compliance	01-JAN-1993	-	Yes
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	1741292	Returned to Compliance	01-APR-1992	30-SEP-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
8546614	4310309	SIA	State Violation/Reminder Notice	21-OCT-2025	State	-
8546613	4310308	SIF	State Public Notification received	18-JUN-2024	State	-
8546609	4310307	SOX	State Compliance achieved	31-JUL-2018	State	-
8546606	4310005	SOX	State Compliance achieved	09-JAN-2006	State	-
8546606	4309904	SOX	State Compliance achieved	09-JAN-2006	State	-
8546406	4310205	SOX	State Compliance achieved	14-OCT-2005	State	Supply issued PN 10/14/05 (LATE), IEPA rcvd copy 10/14/05.
8546406	4310305	SOX	State Compliance achieved	14-OCT-2005	State	Supply issued PN 10/14/05 (LATE), IEPA rcvd copy 10/14/05.
8544799	4308998	SOX	State Compliance achieved	31-MAR-1999	State	-
8544799	4309099	SOX	State Compliance achieved	31-MAR-1999	State	-
8544998	3976097	SOX	State Compliance achieved	19-APR-1998	State	-
6209097	3264795	SOX	State Compliance achieved	03-JAN-1997	State	-
1933894	2228693	SOX	State Compliance achieved	05-APR-1994	State	-
1933594	1960393	SOX	State Compliance achieved	04-MAR-1994	State	-
1933393	1741292	SOX	State Compliance achieved	07-JAN-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 03-EMERGENCY INTER E SHERIDAN	31774	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 04-EMERGENCY INTER GREENBAY	31775	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 05-EMERGENCY INTERCONNECT ROUTE 4	31776	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 02-EMERGENCY INTERCONN SHERIDAN	32248	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 06-EMERGENCY INTERCONNECT ROUTE 43	32249	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 01-MASTER METER	26269	Yes	Consecutive Connection	Surface water	Permanent	Active
LAKE BLUFF	24159	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	46664	No	Distribution System/Zone	-	-	Active
CHILD CARE FACILITY LEAD SAMPLING	46665	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27818	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30240	No	Sampling Station	-	-	Active
ELEV1- 1.0 MG ELEVATED STORAGE	11356	No	Storage	-	-	Active

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Treatment Processes

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No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.

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