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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	7011619	Returned to Compliance	02-JUL-2025	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7011621	Open	01-JUL-2025	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7011617	Open	01-OCT-2024	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7011616	Returned to Compliance	01-JUL-2018	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7011480	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
735813	7011617	SIF	State Public Notification received	11-OCT-2025	State	-
735812	7011621	SIA	State Violation/Reminder Notice	29-JUL-2025	State	-
735811	7011619	SIE	State Public Notification requested	03-JUL-2025	State	-
735807	7011616	SOX	State Compliance achieved	31-JUL-2018	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
CC02 - CONNECTION NW WATER COMM (EMERG)	41031	Yes	Consecutive Connection	Surface water	Emergency	Active
CC01-MAPLE ST STATION	25821	Yes	Consecutive Connection	Surface water	Permanent	Active
DES PLAINES	23333	No	Distribution System/Zone	-	-	Active
IDSE	34963	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45407	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	45408	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	26992	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29414	No	Sampling Station	-	-	Active
10 MG GROUND STORAGE TANK	47157	No	Storage	-	-	Active
4 MG GROUND STORAGE TANK	47158	No	Storage	-	-	Active
MINER ST. 500 K ELEVATED TANK	47159	No	Storage	-	-	Active
HOLY FAMILY HOSPITAL 500 K ELEVATED TANK	47160	No	Storage	-	-	Active
OAKTON ST. 1MG ELEVATED TANK	47161	No	Storage	-	-	Active
HOWARD AVE 1 MG ELEVATED TANK	47162	No	Storage	-	-	Active
DES PLAINES 2 MG ELEVATED TANK	47163	No	Storage	-	-	Active
DISTRIBUTION ELEVATED STORAGE	10952	No	Storage	-	-	Inactive
DISTRIBUTION GROUND STORAGE	12008	No	Storage	-	-	Inactive
TAP 01 GROUND STORAGE	12592	No	Storage	-	-	Inactive
TAP 02 GROUND STORAGE	12593	No	Storage	-	-	Inactive
TP 02-CENTRAL RD BOOSTER STATION	22724	No	Treatment Plant	-	-	Active
TP 01-MAPLE ST STATION	31855	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 02-CENTRAL RD BOOSTER STATION	22724	Gaseous Chlorination, Pre	Disinfection
TP 01-MAPLE ST STATION	31855	Gaseous Chlorination, Pre	Disinfection

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