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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	1912944	Returned to Compliance	02-JUL-2025	-	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	1912693	Returned to Compliance	07-DEC-1992	-	Yes

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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
937	1912944	SIE	State Public Notification requested	03-JUL-2025	State	-
494	1912693	SOX	State Compliance achieved	30-DEC-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 02-CHICAGO (EMERGENCY)	14774	Yes	Consecutive Connection	Surface water	Emergency	Active
CC04-SKOKIE EMERGENCY CONNECTION	43541	Yes	Consecutive Connection	Surface water	Emergency	Active
CC05-SKOKIE EMERGENCY CONNECTION	43542	Yes	Consecutive Connection	Surface water	Emergency	Active
CC03 - CONNECTION TO EVANSTON	41669	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 01-PUMP STATION	25856	Yes	Consecutive Connection	Surface water	Permanent	Inactive
LINCOLNWOOD	23368	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	46395	No	Distribution System/Zone	-	-	Active
CHILD CARE FACILITY LEAD SAMPLING	46396	No	Distribution System/Zone	-	-	Active
PF 03-PEAKING STATION	31742	No	Pump Facility	-	-	Active
GENERIC FINISHED SAMPLING STATION	27027	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29449	No	Sampling Station	-	-	Active
GR01-GROUND STORAGE AT TP01	12034	No	Storage	-	-	Active
SP01-1.5 MG STANDPIPE	31724	No	Storage	-	-	Active
TAP 03 GROUND STORAGE	31743	No	Storage	-	-	Inactive
TP 01-PUMP STATION	31893	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 01-PUMP STATION	31893	Gaseous Chlorination, Post	Disinfection

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