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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	7017513	Open	01-JUL-2025	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7017510	Returned to Compliance	01-JUL-2011	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7017509	Returned to Compliance	06-OCT-2010	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7016980	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
718	7017513	SIA	State Violation/Reminder Notice	10-AUG-2025	State	-
712	7017510	SIA	State Violation/Reminder Notice	09-AUG-2011	State	-
711	7017509	SOX	State Compliance achieved	05-NOV-2010	State	Supply issued a satisfactory CCR 10/27/10 (on time), IEPA rcvd copy 11/5/10.

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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-METER VAULT ON JOLIET ROAD	25977	Yes	Consecutive Connection	Surface water	Permanent	Active
WELL 3 (01480) ABANDONED	33134	Yes	Well	Ground water	Emergency	Inactive
WELL 2 (01479) - ABANDONED	33133	Yes	Well	Ground water	Emergency	Inactive
WELL 1 (01478) DISCONNECTED - ABANDONED	33132	Yes	Well	Ground water	Emergency	Inactive
LA GRANGE HIGHLANDS SNDST	23462	No	Distribution System/Zone	-	-	Active
IDSE	34644	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45328	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	45329	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27121	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29543	No	Sampling Station	-	-	Active
ELEVATED STORAGE TANK	11035	No	Storage	-	-	Active
LA GRANGE HIGHLAND GROUND STORAGE TANK	12104	No	Storage	-	-	Active
TP 01-MAIN PUMP STATION	22798	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 01-MAIN PUMP STATION	22798	Hypochlorination, Post	Disinfection

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