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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
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	613	Known	01-JAN-2026	31-MAR-2026	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	612	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	610	Returned to Compliance	01-NOV-2019	30-NOV-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	611	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	608	Returned to Compliance	01-JUN-2016	31-MAY-2017	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	609	Returned to Compliance	01-JUN-2016	31-MAY-2017	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	305	Returned to Compliance	01-APR-2005	30-APR-2005	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	103	Known	01-MAY-2003	31-MAY-2003	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
1523	612	SIF	State Public Notification received	25-JUN-2025	State	-
1519	610	SIF	State Public Notification received	10-JUL-2020	State	-
1518	611	SIF	State Public Notification received	10-JUL-2020	State	-
1512	609	SIF	State Public Notification received	28-JUN-2018	State	-
1512	608	SIF	State Public Notification received	28-JUN-2018	State	-
1505	305	SOX	State Compliance achieved	03-JUN-2005	State	-
404	103	SIF	State Public Notification received	06-JUL-2004	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 07-EMERGENCY CONNECTION PEKARA SBDV	34049	Yes	Consecutive Connection	Ground water	Emergency	Active
WELL 3 (00637) ABANDONED	34047	Yes	Well	Ground water	Other	Inactive
WELL 2 (20308) ABANDONED	34046	Yes	Well	Ground water	Other	Inactive
WELL 1 (20307) ABANDONED	34045	Yes	Well	Ground water	Other	Inactive
CC 01-DEERFIELD (MONTGOMERY & I-94) EMER	26281	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 02-DEERFIELD (DEERFIELD RD & SAUNDERS	26282	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 03-DEERFIELD (HAWTHORNE LN & SAUNDERS	26283	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 06-EMERGENCY CONNECTION LINCOLNSHIRE	34048	Yes	Consecutive Connection	Surface water	Emergency	Active
CC04-NORTHBROOK WATER TO 1 MG RESERVOIR	40045	Yes	Consecutive Connection	Surface water	Permanent	Active
RIVERWOODS	24180	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27839	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30261	No	Sampling Station	-	-	Active
GR04-1.0 MG GROUND TANK AT TP04	32766	No	Storage	-	-	Active
DISTRIBUTION GROUND STORAGE	34040	No	Storage	-	-	Inactive
DISTRIBUTION PRESSURE STORAGE	34041	No	Storage	-	-	Inactive
TAP 05-PRESSURE STORAGE	34043	No	Storage	-	-	Inactive
TAP 05-GROUND STORAGE	34044	No	Storage	-	-	Inactive
TP 04-PS DISCHARGES NORTHBROOK WATER	32765	No	Treatment Plant	-	-	Active
TP 05-DEERFIELD/MILWAUKEE (INACTIVE)	34042	No	Treatment Plant	-	-	Inactive
TP08-WELL #1 INACTIVE	40048	No	Treatment Plant	-	-	Inactive
TP09-WELL #2 INACTIVE	40049	No	Treatment Plant	-	-	Inactive
TP10-WELL #3 INACTIVE	40050	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 04-PS DISCHARGES NORTHBROOK WATER	32765	Gaseous Chlorination, Pre	Disinfection
TP08-WELL #1 INACTIVE	40048	Gaseous Chlorination, Post	Disinfection
TP09-WELL #2 INACTIVE	40049	Gaseous Chlorination, Post	Disinfection
TP10-WELL #3 INACTIVE	40050	Gaseous Chlorination, Post	Disinfection

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