Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL1110100
PWS Name	CARY
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	17826
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
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7050646	Open	01-JUL-2025	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7050609	Returned to Compliance	01-JUL-2016	-	No
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3281096	Returned to Compliance	01-OCT-1995	31-DEC-1995	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3144495	Returned to Compliance	01-JUL-1995	30-SEP-1995	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	3014895	Returned to Compliance	01-APR-1995	30-JUN-1995	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	1815993	Known	01-JUN-1993	30-JUN-1993	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1892293	Returned to Compliance	01-APR-1993	-	No
TT	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Lead and Copper Rule	1977293	Returned to Compliance	21-DEC-1992	-	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1670993	Known	01-NOV-1992	30-NOV-1992	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	1670893	Known	01-NOV-1992	30-NOV-1992	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	1671093	Known	01-NOV-1992	30-NOV-1992	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1749192	Returned to Compliance	01-OCT-1992	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	262985	Returned to Compliance	01-OCT-1984	30-SEP-1988	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	263084	Returned to Compliance	14-SEP-1984	13-SEP-1988	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	262783	Returned to Compliance	01-JUN-1983	31-MAY-1986	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	262881	Known	17-OCT-1980	16-OCT-1984	Yes
MCL	Maximum Contaminant Level Violation, Average	Inorganic Chemicals	Barium	262680	Known	01-JUN-1980	31-MAY-1983	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7050480	Known	30-JUN-1977	29-JUN-1981	No

1 - 18 of 18

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5386102	7050646	SIA	State Violation/Reminder Notice	18-NOV-2025	State	-
5386098	7050609	SOX	State Compliance achieved	21-JUL-2016	State	-
5385796	3281096	SOX	State Compliance achieved	31-MAR-1996	State	-
5385796	3014895	SOX	State Compliance achieved	31-MAR-1996	State	-
5385796	3144495	SOX	State Compliance achieved	31-MAR-1996	State	-
2122494	1977293	SOX	State Compliance achieved	07-JAN-1994	State	-
2122093	1815993	SIF	State Public Notification received	10-AUG-1993	State	-
2122293	1892293	SOX	State Compliance achieved	29-JUL-1993	State	-
2122193	1749192	SOX	State Compliance achieved	28-JUL-1993	State	-
1781293	1671093	SIE	State Public Notification requested	09-JAN-1993	State	-
1781293	1670993	SIE	State Public Notification requested	09-JAN-1993	State	-
1781293	1670893	SIE	State Public Notification requested	09-JAN-1993	State	-
1007785	262985	SOX	State Compliance achieved	24-APR-1986	State	-
1007785	262783	SOX	State Compliance achieved	24-APR-1986	State	-
1007785	263084	SOX	State Compliance achieved	24-APR-1986	State	-
381	262881	SIF	State Public Notification received	30-SEP-1981	State	-
380	262680	SIF	State Public Notification received	30-SEP-1980	State	-

1 - 17 of 17

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
GR1-250,000-GALLON GST	44804	Yes	Reservoir	Surface water	Other	Inactive
WELL 5 (20140)	19856	Yes	Well	Ground water	Permanent	Inactive
WELL 13 (01428)	32691	Yes	Well	Ground water	Permanent	Active
WELL 10 (20144)	19859	Yes	Well	Ground water	Permanent	Active
WELL 8 (20142)	19858	Yes	Well	Ground water	Permanent	Active
WELL 6 (20141)	19857	Yes	Well	Ground water	Permanent	Active
WELL 4 (20139)	19855	Yes	Well	Ground water	Permanent	Active
WELL 3 (20138)	19854	Yes	Well	Ground water	Permanent	Active
WELL 12 (00952)	18756	Yes	Well	Ground water	Permanent	Active
WELL 11 (00705)	18511	Yes	Well	Ground water	Permanent	Active
WELL 9 (00306)	18126	Yes	Well	Ground water	Permanent	Active
GR2-2.0 MG GST	44805	Yes	Reservoir	Surface water	Other	Inactive
CARY	24400	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45783	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	45785	No	Distribution System/Zone	-	-	Active
PF 11-BOOSTER STATION NE PRESSURE ZONE	33561	No	Other	-	-	Active
PF 10-BOOSTER STATION ELEV TANK	33563	No	Pump Facility	-	-	Active
GENERIC FINISHED SAMPLING STATION	28059	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30481	No	Sampling Station	-	-	Active
DISTRIBUTION ELEVATED STORAGE	11453	No	Storage	-	-	Active
DISTRIBUTION GROUND STORAGE	12310	No	Storage	-	-	Active
GR09-2.0 MG GROUND TANK AT TP09	33558	No	Storage	-	-	Active
ELEV1-250,000-GALLON EST	44800	No	Storage	-	-	Active
ELEV2-500,000-GALLON EST	44801	No	Storage	-	-	Active
ELEV3-500,000-GALLON EST	44802	No	Storage	-	-	Active
ELEV4-400,000-GALLON EST	44803	No	Storage	-	-	Active
GR01-250K GROUND TANK AT TP01	44835	No	Storage	-	-	Active
TAP 08 GROUND STORAGE	12934	No	Storage	-	-	Inactive
GR09-2.0 MG GROUND TANK AT TP09	44836	No	Storage	-	-	Inactive
TP 01-WELL 4 -LOW PRES ZONE	16453	No	Treatment Plant	-	-	Active
TP 02-WELL 6 - WEST HIGH PRES ZONE	16454	No	Treatment Plant	-	-	Active
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	No	Treatment Plant	-	-	Active
TP 04-WELL 10 - WEST HIGH PRES ZONE	16456	No	Treatment Plant	-	-	Active
TP 05-WELL 3 - LOW PRES ZONE	16457	No	Treatment Plant	-	-	Active
TP 07-WELL 11 - WEST HIGH PRES ZONE	16459	No	Treatment Plant	-	-	Active
TP 08-WELL 12 - WEST HIGH PRES ZONE	16460	No	Treatment Plant	-	-	Active
TP 09-WELL 13 - NE HIGH PRES ZONE	33557	No	Treatment Plant	-	-	Active
TP 06-INACTIVE WELL 9	16458	No	Treatment Plant	-	-	Inactive

1 - 38 of 38

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 01-WELL 4 -LOW PRES ZONE	16453	Fluoridation	Other
TP 01-WELL 4 -LOW PRES ZONE	16453	Ion Exchange	Inorganics removal
TP 01-WELL 4 -LOW PRES ZONE	16453	Aeration, Slat Tray	Organics removal
TP 01-WELL 4 -LOW PRES ZONE	16453	Aeration, Slat Tray	Other
TP 01-WELL 4 -LOW PRES ZONE	16453	Gaseous Chlorination, Post	Disinfection
TP 01-WELL 4 -LOW PRES ZONE	16453	Gaseous Chlorination, Pre	Iron removal
TP 02-WELL 6 - WEST HIGH PRES ZONE	16454	Fluoridation	Other
TP 02-WELL 6 - WEST HIGH PRES ZONE	16454	Ion Exchange	Inorganics removal
TP 02-WELL 6 - WEST HIGH PRES ZONE	16454	Gaseous Chlorination, Post	Disinfection
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Fluoridation	Other
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Filtration, Pressure Sand	Iron removal
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Aeration, Slat Tray	Iron removal
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Aeration, Slat Tray	Organics removal
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Gaseous Chlorination, Post	Disinfection
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Gaseous Chlorination, Pre	Disinfection
TP 03-WELLS 8 AND 9 - LOW PRES ZONE	16455	Gaseous Chlorination, Pre	Iron removal
TP 04-WELL 10 - WEST HIGH PRES ZONE	16456	Fluoridation	Other
TP 04-WELL 10 - WEST HIGH PRES ZONE	16456	Filtration, Pressure Sand	Iron removal
TP 04-WELL 10 - WEST HIGH PRES ZONE	16456	Gaseous Chlorination, Pre	Disinfection
TP 05-WELL 3 - LOW PRES ZONE	16457	Fluoridation	Other
TP 05-WELL 3 - LOW PRES ZONE	16457	Filtration, Pressure Sand	Iron removal
TP 05-WELL 3 - LOW PRES ZONE	16457	Aeration, Spray	Iron removal
TP 05-WELL 3 - LOW PRES ZONE	16457	Gaseous Chlorination, Pre	Disinfection
TP 07-WELL 11 - WEST HIGH PRES ZONE	16459	Fluoridation	Other
TP 07-WELL 11 - WEST HIGH PRES ZONE	16459	Filtration, Pressure Sand	Iron removal
TP 07-WELL 11 - WEST HIGH PRES ZONE	16459	Aeration, Slat Tray	Iron removal
TP 07-WELL 11 - WEST HIGH PRES ZONE	16459	Gaseous Chlorination, Post	Disinfection
TP 07-WELL 11 - WEST HIGH PRES ZONE	16459	Gaseous Chlorination, Pre	Iron removal
TP 08-WELL 12 - WEST HIGH PRES ZONE	16460	Fluoridation	Other
TP 08-WELL 12 - WEST HIGH PRES ZONE	16460	Filtration, Pressure Sand	Iron removal
TP 08-WELL 12 - WEST HIGH PRES ZONE	16460	Aeration, Slat Tray	Iron removal
TP 08-WELL 12 - WEST HIGH PRES ZONE	16460	Gaseous Chlorination, Post	Disinfection
TP 08-WELL 12 - WEST HIGH PRES ZONE	16460	Gaseous Chlorination, Pre	Iron removal
TP 09-WELL 13 - NE HIGH PRES ZONE	33557	Ion Exchange	Inorganics removal
TP 09-WELL 13 - NE HIGH PRES ZONE	33557	Ion Exchange	Radionuclides removal
TP 09-WELL 13 - NE HIGH PRES ZONE	33557	Gaseous Chlorination, Pre	Disinfection
TP 09-WELL 13 - NE HIGH PRES ZONE	33557	Fluoridation	Other
TP 09-WELL 13 - NE HIGH PRES ZONE	33557	Gaseous Chlorination, Post	Disinfection

1 - 38 of 38

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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