Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL1115750
PWS Name	WONDER LAKE
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	3870
County Served	McHenry

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
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7146999	Open	01-JUL-2025	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	7146998	Returned to Compliance	01-APR-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7146994	Returned to Compliance	10-FEB-2024	-	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	7146990	Returned to Compliance	02-APR-2023	-	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	7146945	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7146505	Returned to Compliance	12-MAR-2005	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	7146405	Returned to Compliance	12-MAR-2005	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	7146205	Returned to Compliance	01-OCT-2004	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	7146004	Returned to Compliance	01-APR-2004	30-JUN-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	7145904	Returned to Compliance	01-APR-2004	30-JUN-2004	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	7145704	Known	01-JAN-2004	31-JAN-2004	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	5699102	Known	01-MAY-2002	31-MAY-2002	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5311101	Known	01-JAN-2001	31-JAN-2001	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	4209298	Known	01-JUL-1998	31-JUL-1998	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	3146495	Known	01-JUL-1995	31-JUL-1995	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1824393	Known	01-MAY-1993	31-MAY-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1824193	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	1824093	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	1823993	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	1823893	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	1823793	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	1823693	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	1823593	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	1823493	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	1823393	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	1823293	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	1823193	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	1823093	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	1822993	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	1822793	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	1822893	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	1824293	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	2139593	Known	01-APR-1993	30-JUN-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	1755393	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	1755493	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1755593	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	1755693	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	2139493	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	1754193	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	1755293	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	1754293	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	1754393	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	1754493	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	1754593	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	1754693	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	1754793	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	1754893	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	1754993	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	1755093	Known	01-JAN-1993	31-MAR-1993	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	1755193	Known	01-JAN-1993	31-MAR-1993	No

1 - 50 of 86

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9945261	7146998	SOX	State Compliance achieved	27-AUG-2025	State	-
9945260	7146999	SIE	State Public Notification requested	29-JUL-2025	State	-
9945252	7146994	SOX	State Compliance achieved	08-APR-2024	State	-
9945240	7146945	SOX	State Compliance achieved	19-SEP-2023	State	-
9945238	7146990	SOX	State Compliance achieved	22-JUN-2023	State	-
9945005	7146205	SOX	State Compliance achieved	30-SEP-2005	State	-
9944605	7146405	SFK	State Bilateral Compliance Agreement signed	05-AUG-2005	State	VN # W-2005-00341 dated 7/26/05
9944605	7146505	SFK	State Bilateral Compliance Agreement signed	05-AUG-2005	State	VN # W-2005-00341 dated 7/26/05
9944205	7145704	SIF	State Public Notification received	28-JUL-2005	State	-
9943404	7145904	SOX	State Compliance achieved	29-SEP-2004	State	-
9943404	7146004	SOX	State Compliance achieved	29-SEP-2004	State	-
9943103	5699102	SIF	State Public Notification received	16-MAY-2003	State	-
481001	5311101	SIE	State Public Notification requested	15-MAR-2001	State	-
7362898	4209298	SIE	State Public Notification requested	15-SEP-1998	State	-
5020996	3146495	SIE	State Public Notification requested	01-OCT-1995	State	-
1E94	1593692	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1593792	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1593892	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1593992	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594092	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594192	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594292	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594392	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594492	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594592	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594692	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594792	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594892	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1594992	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1595092	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1595192	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678093	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678193	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678293	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678393	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678493	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678593	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678693	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678793	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678893	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1678993	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1679093	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1679193	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1679293	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1679393	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1679493	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1679593	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1754193	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1754293	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS
1E94	1754393	EF!	Federal Proposed Administrative Order Issued	11-APR-1994	ODSWeb	RS

1 - 50 of 85

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC 02-INTERCONNECT	31758	Yes	Consecutive Connection	Ground water	Other	Inactive
WELL 9 (02109)	41180	Yes	Well	Ground water	Permanent	Active
WELL #5 (WL01674)	40838	Yes	Well	Ground water	Permanent	Active
WELL #4 (WL01673)	40837	Yes	Well	Ground water	Permanent	Active
WELL #8 (WL01713) ABANDONED	40840	Yes	Well	Ground water	Other	Inactive
WELL #2 (WL20152) SEALED	40835	Yes	Well	Ground water	Other	Inactive
WELL #1 (WL20149) SEALED	19864	Yes	Well	Ground water	Other	Inactive
WELL #7 (WL01569) EMERGENCY	40841	Yes	Well	Ground water	Emergency	Active
WELL #6 (WL01568) EMERGENCY	40839	Yes	Well	Ground water	Emergency	Active
WELL #3 (WL00595) EMERGENCY	40836	Yes	Well	Ground water	Emergency	Active
WONDER LAKE	24429	No	Distribution System/Zone	-	-	Active
AGGRESSIVE INDEX FROM AC PIPE	43512	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	45157	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	28088	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30510	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	41142	No	Sampling Station	-	-	Active
WATER QUALITY SAMPLING	41143	No	Sampling Station	-	-	Active
HD03-14,000 GALLON PRESSURE TANK	40844	No	Storage	-	-	Active
HD04-6,600 GALLON PRESSURE TANK	40846	No	Storage	-	-	Active
GR04-504,000 GALLON GROUND RESERVOIR	40847	No	Storage	-	-	Active
HD05-7,500 GALLON PRESSURE TANK	40849	No	Storage	-	-	Active
GR05-202,000 GALLON GROUND RESERVOIR	40850	No	Storage	-	-	Active
DISTRIBUTION PRESSURE TANK	13602	No	Storage	-	-	Inactive
TAP 01 PRESSURE STORAGE	14201	No	Storage	-	-	Inactive
DISTRIBUTION GROUND STORAGE	40834	No	Storage	-	-	Inactive
TM 02-CONNECTION WITH HIGHLAND SHORES	33714	No	Transmission Main (Manifold)	-	-	Inactive
TP03-WELL #3 TR.W/ NAOCL EMER	40843	No	Treatment Plant	-	-	Active
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	No	Treatment Plant	-	-	Active
TP05-WL #9 TRTED W/ IRON FILTER	40848	No	Treatment Plant	-	-	Active
TP01-WELL 1 DISCONNECTED	16547	No	Treatment Plant	-	-	Inactive
TP02-WELL #2 DISCONNECTED	40842	No	Treatment Plant	-	-	Inactive

1 - 31 of 31

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP01-WELL 1 DISCONNECTED	16547	Fluoridation	Other
TP01-WELL 1 DISCONNECTED	16547	Hypochlorination, Post	Disinfection
TP01-WELL 1 DISCONNECTED	16547	Sequestration	Iron removal
TP02-WELL #2 DISCONNECTED	40842	Hypochlorination, Post	Disinfection
TP02-WELL #2 DISCONNECTED	40842	Fluoridation	Other
TP02-WELL #2 DISCONNECTED	40842	Inhibitor, Polyphosphate	Corrosion control
TP03-WELL #3 TR.W/ NAOCL EMER	40843	Hypochlorination, Post	Disinfection
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	Aeration, Diffused	Iron removal
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	Hypochlorination, Pre	Iron removal
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	Hypochlorination, Post	Disinfection
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	Filtration, Pressure Sand	Iron removal
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	Inhibitor, Polyphosphate	Corrosion control
TP04-WELL #4 & #5 TREATED W/ IRON FILTER	40845	Fluoridation	Other
TP05-WL #9 TRTED W/ IRON FILTER	40848	Hypochlorination, Post	Disinfection
TP05-WL #9 TRTED W/ IRON FILTER	40848	Filtration, Pressure Sand	Iron removal
TP05-WL #9 TRTED W/ IRON FILTER	40848	Aeration, Diffused	Iron removal
TP05-WL #9 TRTED W/ IRON FILTER	40848	Hypochlorination, Pre	Iron removal
TP05-WL #9 TRTED W/ IRON FILTER	40848	Fluoridation	Other
TP05-WL #9 TRTED W/ IRON FILTER	40848	Inhibitor, Polyphosphate	Corrosion control

1 - 19 of 19

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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