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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)	7113309	Known	01-OCT-2025	31-DEC-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	7113308	Known	01-OCT-2025	31-DEC-2025	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7113307	Open	01-JUL-2025	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	6008780	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	6008580	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	6008380	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	6008280	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	6008980	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	6008480	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	6008180	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	6008880	Known	25-JUN-1979	24-JUN-1980	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7112980	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
388007	7113307	SIA	State Violation/Reminder Notice	02-SEP-2025	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 03-MLTPLE EMRGNCY INTCNCTS-WINNETKA	32893	Yes	Consecutive Connection	Surface water	Emergency	Active
INTAKE (01300) 1971	25517	Yes	Intake	Surface water	Permanent	Active
INTAKE (00108) 1933	25516	Yes	Intake	Surface water	Permanent	Active
CC 05-MLTPL EMRGY INTRCNCT - EVANSTON	32895	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 04-MLTPL EMRGY INTRCNCT-KENILWORTH	32894	Yes	Consecutive Connection	Surface water	Other	Inactive
WILMETTE	23419	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45732	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	45733	No	Distribution System/Zone	-	-	Active
PF 02-LARAMIE AVE PEAKING STA	33422	No	Pump Facility	-	-	Inactive
GENERIC FINISHED SAMPLING STATION	27078	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29500	No	Sampling Station	-	-	Active
SSIN01300, IN00108	33603	No	Sampling Station	-	-	Active
LT2 SAMPLING	34811	No	Sampling Station	-	-	Active
DISTRIBUTION STANDPIPE STORAGE	14339	No	Storage	-	-	Active
GR-2-3.0 MG GROUND TANK AT TP02	32892	No	Storage	-	-	Active
GR01-5.2 MG GROUND STORAGE AT SWTP	44149	No	Storage	-	-	Active
STANDPIPE1-4.0 MG STANDPIPE	44150	No	Storage	-	-	Active
DISTRIBUTION GROUND STORAGE	12079	No	Storage	-	-	Inactive
TP 01-SURFACE WATER PLANT	14825	No	Treatment Plant	-	-	Active
TP 02-PEAKING STATION CHLORINATION	32891	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 01-SURFACE WATER PLANT	14825	Activated Carbon, Powdered	Disinfection by-products control
TP 01-SURFACE WATER PLANT	14825	Rapid Mix	Particulate removal
TP 01-SURFACE WATER PLANT	14825	Hypochlorination, Post	Disinfection
TP 01-SURFACE WATER PLANT	14825	Activated Carbon, Powdered	Organics removal
TP 01-SURFACE WATER PLANT	14825	Fluoridation	Other
TP 01-SURFACE WATER PLANT	14825	Coagulation	Particulate removal
TP 01-SURFACE WATER PLANT	14825	Filtration, Rapid Sand	Particulate removal
TP 01-SURFACE WATER PLANT	14825	Inhibitor, Polyphosphate	Corrosion control
TP 02-PEAKING STATION CHLORINATION	32891	Gaseous Chlorination, Post	Disinfection

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