Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL1171200
PWS Name	WILSONVILLE
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	536
County Served	Macoupin

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.

Violations

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	5345815	Open	01-JUL-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	5345814	Returned to Compliance	01-OCT-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	5345812	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	5345813	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	5345811	Returned to Compliance	30-DEC-2020	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	5345810	Returned to Compliance	01-OCT-2019	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	5345808	Returned to Compliance	01-DEC-2015	31-DEC-2015	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chloramine	5345809	Returned to Compliance	01-OCT-2015	31-DEC-2015	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	5345505	Returned to Compliance	01-JAN-2005	31-MAR-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	5345405	Returned to Compliance	01-JAN-2005	31-MAR-2005	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	5344701	Known	01-JUN-2001	30-JUN-2001	No
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	Atrazine	3906897	Returned to Compliance	01-JUL-1997	30-SEP-1997	Yes
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	Atrazine	3829197	Returned to Compliance	01-APR-1997	30-JUN-1997	Yes
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	Atrazine	3736597	Returned to Compliance	01-JAN-1997	31-MAR-1997	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3665697	Known	01-NOV-1996	30-NOV-1996	No
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	Atrazine	3665597	Returned to Compliance	01-OCT-1996	31-DEC-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	Atrazine	3554296	Returned to Compliance	01-JUL-1996	30-SEP-1996	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3456896	Known	01-MAY-1996	31-MAY-1996	No
MCL	Maximum Contaminant Level Violation, Average	Synthetic Organic Chemicals	Atrazine	3456796	Returned to Compliance	01-APR-1996	30-JUN-1996	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2801595	Known	01-DEC-1994	31-DEC-1994	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	2495794	Returned to Compliance	01-JUL-1994	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2495694	Known	01-JUN-1994	30-JUN-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2495594	Known	01-APR-1994	30-APR-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2326094	Known	01-JAN-1994	31-JAN-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1983393	Known	01-JUL-1993	31-JUL-1993	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	2146693	Returned to Compliance	01-APR-1993	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1762193	Known	01-MAR-1993	31-MAR-1993	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1762093	Known	01-FEB-1993	28-FEB-1993	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1598492	Known	01-AUG-1992	31-AUG-1992	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1305491	Known	01-MAR-1991	31-MAR-1991	No

1 - 30 of 30

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
7206426	5345813	SIF	State Public Notification received	15-OCT-2025	State	-
7206425	5345812	SIF	State Public Notification received	15-OCT-2025	State	-
7206424	5345815	SIA	State Violation/Reminder Notice	06-SEP-2025	State	-
7206423	5345814	SIF	State Public Notification received	17-JUL-2025	State	-
7206414	5345811	SOX	State Compliance achieved	10-MAR-2021	State	-
7206415	5345810	SOX	State Compliance achieved	25-SEP-2020	State	-
7206408	5345809	SIF	State Public Notification received	27-JUN-2016	State	-
7206409	5345808	SIF	State Public Notification received	27-JUN-2016	State	-
7206306	5345505	SIF	State Public Notification received	13-JUL-2006	State	-
7206306	5345405	SIF	State Public Notification received	13-JUL-2006	State	-
733901	5344701	SIE	State Public Notification requested	15-AUG-2001	State	-
6675897	3906897	SOX	State Compliance achieved	24-SEP-1997	State	-
6675897	3456796	SOX	State Compliance achieved	24-SEP-1997	State	-
6675897	3554296	SOX	State Compliance achieved	24-SEP-1997	State	-
6675897	3665597	SOX	State Compliance achieved	24-SEP-1997	State	-
6675897	3736597	SOX	State Compliance achieved	24-SEP-1997	State	-
6675897	3829197	SOX	State Compliance achieved	24-SEP-1997	State	-
6251197	3665697	SIE	State Public Notification requested	25-JAN-1997	State	-
5806496	3456896	SIE	State Public Notification requested	27-JUL-1996	State	-
4208895	2801595	SIE	State Public Notification requested	26-FEB-1995	State	-
4524095	2495794	SOX	State Compliance achieved	31-DEC-1994	State	-
4524095	2146693	SOX	State Compliance achieved	31-DEC-1994	State	-
2148194	2495694	SIE	State Public Notification requested	27-AUG-1994	State	-
2147994	2495594	SIE	State Public Notification requested	18-JUN-1994	State	-
2148294	2326094	SIA	State Violation/Reminder Notice	06-MAR-1994	State	-
2147593	1983393	SIE	State Public Notification requested	04-SEP-1993	State	-
1970493	1762193	SIE	State Public Notification requested	29-APR-1993	State	-
1970293	1762093	SIE	State Public Notification requested	01-APR-1993	State	-
1606693	1598492	SIE	State Public Notification requested	04-OCT-1992	State	-
916591	1305491	SIE	State Public Notification requested	02-MAY-1991	State	-

1 - 30 of 30

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC 01-MASTER METER (MT.CLARE)	26361	Yes	Consecutive Connection	Surface water	Emergency	Active
CC 02-MASTER METER (GILLESPIE)	41447	Yes	Consecutive Connection	Surface water	Permanent	Active
WILSONVILLE	24522	No	Distribution System/Zone	-	-	Active
IDSE	35517	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	28181	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30603	No	Sampling Station	-	-	Active
ELEV1 - 60K GAL ELEVATED STORAGE	11521	No	Storage	-	-	Active

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Treatment Processes

No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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