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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	7110710	Returned to Compliance	02-JUL-2025	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7110707	Returned to Compliance	01-JUL-2019	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7110705	Returned to Compliance	01-JUL-2012	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	2422594	Known	01-JUN-1994	30-JUN-1994	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2073994	Known	01-DEC-1993	31-DEC-1993	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2073894	Known	01-NOV-1993	30-NOV-1993	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2073794	Known	01-OCT-1993	31-OCT-1993	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2073693	Known	01-SEP-1993	30-SEP-1993	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2073593	Known	01-AUG-1993	31-AUG-1993	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2073493	Known	01-JUL-1993	31-JUL-1993	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7110380	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
1708	7110710	SOX	State Compliance achieved	14-JUL-2025	State	-
1705	7110707	SOX	State Compliance achieved	29-MAY-2020	State	-
1703	7110705	SOX	State Compliance achieved	18-JUN-2013	State	-
794	2422594	SIA	State Violation/Reminder Notice	20-AUG-1994	State	-
994	2073994	SIF	State Public Notification received	24-MAR-1994	State	-
594	2073493	SIA	State Violation/Reminder Notice	04-JAN-1994	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
CC03-EMERGENCY CONNECTION WITH WINNETKA	31665	Yes	Consecutive Connection	Surface water	Emergency	Active
INTAKE (00107) LAKE MICHIGAN	25514	Yes	Intake	Surface water	Other	Inactive
CC02-EMERGENCY CONNECTION WITH WILMETTE	31666	Yes	Consecutive Connection	Surface water	Emergency	Active
CC01-METERED CONNECTION W/ WILMETTE	41152	Yes	Consecutive Connection	Surface water	Permanent	Active
KENILWORTH	23363	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45101	No	Distribution System/Zone	-	-	Active
SCHILDCARE FACILITY LEAD SAMPLING	45102	No	Distribution System/Zone	-	-	Active
PF01-BOOSTER STA FOR WILMETTE CONNECTION	41153	No	Pump Facility	-	-	Active
GENERIC FINISHED SAMPLING STATION	27022	No	Sampling Station	-	-	Inactive
GENERIC RAW SAMPLING STATION	29444	No	Sampling Station	-	-	Inactive
SSIN00107	33601	No	Sampling Station	-	-	Inactive
LT2 SAMPLING STATION	35275	No	Sampling Station	-	-	Inactive
200,000 GALLON ELEVATED STORAGE TANK	10972	No	Storage	-	-	Active
TP 01-SURFACE WATER PLANT	14767	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 01-SURFACE WATER PLANT	14767	Gaseous Chlorination, Pre	Taste / odor control
TP 01-SURFACE WATER PLANT	14767	Activated Carbon, Powdered	Taste / odor control
TP 01-SURFACE WATER PLANT	14767	Gaseous Chlorination, Post	Disinfection
TP 01-SURFACE WATER PLANT	14767	Fluoridation	Other
TP 01-SURFACE WATER PLANT	14767	Gaseous Chlorination, Pre	Disinfection
TP 01-SURFACE WATER PLANT	14767	Activated Carbon, Powdered	Organics removal
TP 01-SURFACE WATER PLANT	14767	Inhibitor, Polyphosphate	Corrosion control
TP 01-SURFACE WATER PLANT	14767	Flocculation	Particulate removal
TP 01-SURFACE WATER PLANT	14767	Rapid Mix	Particulate removal
TP 01-SURFACE WATER PLANT	14767	Sedimentation	Particulate removal
TP 01-SURFACE WATER PLANT	14767	Filtration, Rapid Sand	Particulate removal
TP 01-SURFACE WATER PLANT	14767	Coagulation	Particulate removal

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