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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	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4718205	Open	22-AUG-2025	-	No
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	4718203	Open	02-JUL-2025	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	4718204	Returned to Compliance	01-JUL-2025	-	No
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	4718202	Open	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	4718201	Open	17-OCT-2024	-	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	4718199	Returned to Compliance	01-DEC-2009	31-DEC-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4718200	Returned to Compliance	01-OCT-2009	31-DEC-2009	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	4718198	Returned to Compliance	22-DEC-1997	-	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3806397	Known	01-APR-1997	30-APR-1997	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	3637295	Returned to Compliance	01-JAN-1996	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2993095	Known	01-APR-1995	30-APR-1995	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
6371613	4718205	SIA	State Violation/Reminder Notice	24-SEP-2025	State	-
6371612	4718204	SOX	State Compliance achieved	16-SEP-2025	State	-
6371606	4718201	SIE	State Public Notification requested	22-JUL-2025	State	-
6371610	4718203	SIE	State Public Notification requested	03-JUL-2025	State	-
6371608	4718202	SIE	State Public Notification requested	02-JUL-2025	State	-
6371604	4718199	SOX	State Compliance achieved	01-JUL-2010	State	Supply went 6 months without a coliform violation.
6371603	4718200	SIF	State Public Notification received	25-JUN-2010	State	-
100	4718198	SOX	State Compliance achieved	29-MAR-2000	State	-
6371597	3806397	SIE	State Public Notification requested	28-JUN-1997	State	-
5981996	3637295	SOX	State Compliance achieved	30-JUN-1996	State	-
4460595	2993095	SIE	State Public Notification requested	24-JUN-1995	State	-

• 1 - 11 of 11

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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
CC01-MTR VAULT NE O'PLAINE AND DAN PATCH	26257	Yes	Consecutive Connection	Surface water	Permanent	Active
GREEN OAKS	24127	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45790	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27786	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30208	No	Sampling Station	-	-	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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