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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDIL1110600
PWS NameMCHENRY
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served22335
County ServedMcHenry

Note

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.

PWS Violation

Violations

Violation Category CodeViolation Type DescriptionRule NameContaminant NameViolation IDCompliance Status DescriptionCompliance Period Begin DateCompliance Period End DateIs Health Based Ind
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule7051341Open01-JUL-2025 - No
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule7051319Returned to Compliance01-OCT-2023 - No
MRMonitoring, RegularVolatile Organic ChemicalsXylenes, Total7051323Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicalscis-1,2-Dichloroethylene7051322Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicals1,2,4-Trichlorobenzene7051321Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsStyrene7051340Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsEthylbenzene7051339Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsToluene7051338Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsBenzene7051337Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsCHLOROBENZENE7051336Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsTetrachloroethylene7051335Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicals1,1,2-Trichloroethane7051334Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsTrichloroethylene7051333Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloropropane7051332Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsCarbon tetrachloride7051331Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicals1,1,1-Trichloroethane7051330Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloroethane7051329Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicalstrans-1,2-Dichloroethylene7051328Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicals1,1-Dichloroethylene7051327Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsVinyl chloride7051320Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicalsp-Dichlorobenzene7051326Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic Chemicalso-Dichlorobenzene7051325Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring, RegularVolatile Organic ChemicalsDICHLOROMETHANE7051324Returned to Compliance01-JAN-202331-DEC-2023No
MRWater Quality Parameter M/RLead and Copper RuleLead and Copper Rule3825197Returned to Compliance01-APR-199730-JUN-1997No
MRWater Quality Parameter M/RLead and Copper RuleLead and Copper Rule3825097Returned to Compliance01-JAN-199731-MAR-1997No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)3549696Known01-AUG-199631-AUG-1996Yes
TTOCCT/SOWT Study/RecommendationLead and Copper RuleLead and Copper Rule1977792Returned to Compliance02-APR-1992 - Yes
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U7050880Known30-JUN-197729-JUN-1981No
  • 1 - 28 of 28

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
72006117051341SIEState Public Notification requested29-JUL-2025State -
72006077051331SIFState Public Notification received17-JUN-2024State -
72006077051340SIFState Public Notification received17-JUN-2024State -
72006077051339SIFState Public Notification received17-JUN-2024State -
72006077051338SIFState Public Notification received17-JUN-2024State -
72006077051337SIFState Public Notification received17-JUN-2024State -
72006087051320SIFState Public Notification received17-JUN-2024State -
72006077051321SIFState Public Notification received17-JUN-2024State -
72006077051322SIFState Public Notification received17-JUN-2024State -
72006077051323SIFState Public Notification received17-JUN-2024State -
72006077051324SIFState Public Notification received17-JUN-2024State -
72006077051325SIFState Public Notification received17-JUN-2024State -
72006077051326SIFState Public Notification received17-JUN-2024State -
72006077051327SIFState Public Notification received17-JUN-2024State -
72006077051328SIFState Public Notification received17-JUN-2024State -
72006077051329SIFState Public Notification received17-JUN-2024State -
72006077051330SIFState Public Notification received17-JUN-2024State -
72006077051332SIFState Public Notification received17-JUN-2024State -
72006077051333SIFState Public Notification received17-JUN-2024State -
72006077051334SIFState Public Notification received17-JUN-2024State -
72006077051335SIFState Public Notification received17-JUN-2024State -
72006077051336SIFState Public Notification received17-JUN-2024State -
72006067051319SOXState Compliance achieved29-FEB-2024State -
72005983825197SOXState Compliance achieved09-APR-1998State -
72005983825097SOXState Compliance achieved09-APR-1998State -
60316973549696SIEState Public Notification requested02-NOV-1996State -
4941977792SOXState Compliance achieved01-FEB-1994State -
  • 1 - 27 of 27

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 11 (01351) EMERGENCY32298YesWell Ground waterEmergencyActive
WELL 6 (20211)19926YesWell Ground waterPermanentActive
WELL 5 (20210)19925YesWell Ground waterPermanentActive
WELL 3 (20208)19923YesWell Ground waterPermanentActive
WELL 2 (20207) 105 GREEN ST19922YesWell Ground waterPermanentActive
WELL 10 (01099) AT 2007 PINE ST18895YesWell Ground waterPermanentActive
WELL 9 (00874)18680YesWell Ground waterPermanentActive
WELL 8 (00674)18484YesWell Ground waterPermanentActive
WELL 7 (00214)18045YesWell Ground waterPermanentActive
WELL 4 (20209) ABANDONED19924YesWell Ground waterOtherInactive
WELL 1 (20206) ABANDONED19921YesWell Ground waterOtherInactive
WELL 12 (01597) EMERGENCY33951YesWell Ground waterEmergencyActive
MC HENRY24407NoDistribution System/Zone - - Active
SCHOOL LEAD SAMPLING45386NoDistribution System/Zone - - Active
CHILDCARE FACILITY LEAD SAMPLING45387NoDistribution System/Zone - - Active
PF 08-BOOSTER STATION33024NoPump Facility - - Active
GENERIC FINISHED SAMPLING STATION28066NoSampling Station - - Active
GENERIC RAW SAMPLING STATION30488NoSampling Station - - Active
COMBINATION OF WELL 2 AND 331570NoSampling Station - - Active
COMBINATION OF WELL 9 AND 1031571NoSampling Station - - Active
COMBINATION 0F WELL 7 AND 831572NoSampling Station - - Active
COMBINATION OF WELL 5 AND 6 ON S HWY 12031573NoSampling Station - - Active
DISTRIBUTION ELEVATED STORAGE11460NoStorage - - Active
DISTRIBUTION GROUND STORAGE12314NoStorage - - Inactive
TAP 01 GROUND STORAGE33022NoStorage - - Inactive
TP 01-IRON & MANGANESE REMOVAL PLANT 116494NoTreatment Plant - - Active
TP 02-IRON REMOVAL PLANT 216495NoTreatment Plant - - Active
TP 05-IRON REMOVAL PLANT 316498NoTreatment Plant - - Active
TP 06-IRON REMOVAL PLANT 416499NoTreatment Plant - - Active
TP 07-WELL 11 (EMERGENCY)33111NoTreatment Plant - - Active
TP 09 - WELL 12 (EMERGENCY)33962NoTreatment Plant - - Active
TP 03-WELL1 (ABANDONED)16496NoTreatment Plant - - Inactive
TP 04-WELL 4 (ABANDONED)16497NoTreatment Plant - - Inactive
  • 1 - 33 of 33

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TP 01-IRON & MANGANESE REMOVAL PLANT 116494FluoridationOther
TP 01-IRON & MANGANESE REMOVAL PLANT 116494Gaseous Chlorination, PostDisinfection
TP 01-IRON & MANGANESE REMOVAL PLANT 116494Inhibitor, PolyphosphateCorrosion control
TP 01-IRON & MANGANESE REMOVAL PLANT 116494PermanganateIron removal
TP 01-IRON & MANGANESE REMOVAL PLANT 116494Aeration, CascadeIron removal
TP 01-IRON & MANGANESE REMOVAL PLANT 116494Filtration, GreensandIron removal
TP 01-IRON & MANGANESE REMOVAL PLANT 116494SequestrationIron removal
TP 01-IRON & MANGANESE REMOVAL PLANT 116494Filtration, GreensandManganese removal
TP 01-IRON & MANGANESE REMOVAL PLANT 116494Aeration, CascadeManganese removal
TP 01-IRON & MANGANESE REMOVAL PLANT 116494PermanganateManganese removal
TP 02-IRON REMOVAL PLANT 216495FluoridationOther
TP 02-IRON REMOVAL PLANT 216495Aeration, SprayIron removal
TP 02-IRON REMOVAL PLANT 216495Filtration, Pressure SandIron removal
TP 02-IRON REMOVAL PLANT 216495Inhibitor, PolyphosphateCorrosion control
TP 02-IRON REMOVAL PLANT 216495Gaseous Chlorination, PostDisinfection
TP 02-IRON REMOVAL PLANT 216495SequestrationIron removal
TP 05-IRON REMOVAL PLANT 316498FluoridationOther
TP 05-IRON REMOVAL PLANT 316498Filtration, Pressure SandIron removal
TP 05-IRON REMOVAL PLANT 316498Gaseous Chlorination, PostDisinfection
TP 05-IRON REMOVAL PLANT 316498Inhibitor, PolyphosphateCorrosion control
TP 05-IRON REMOVAL PLANT 316498SequestrationIron removal
TP 05-IRON REMOVAL PLANT 316498Gaseous Chlorination, PreIron removal
TP 06-IRON REMOVAL PLANT 416499FluoridationOther
TP 06-IRON REMOVAL PLANT 416499Filtration, Pressure SandIron removal
TP 06-IRON REMOVAL PLANT 416499Gaseous Chlorination, PostDisinfection
TP 06-IRON REMOVAL PLANT 416499Inhibitor, PolyphosphateCorrosion control
TP 06-IRON REMOVAL PLANT 416499SequestrationIron removal
TP 06-IRON REMOVAL PLANT 416499Gaseous Chlorination, PreIron removal
TP 07-WELL 11 (EMERGENCY)33111FluoridationOther
TP 07-WELL 11 (EMERGENCY)33111Hypochlorination, PostDisinfection
TP 07-WELL 11 (EMERGENCY)33111Inhibitor, PolyphosphateCorrosion control
TP 09 - WELL 12 (EMERGENCY)33962Hypochlorination, PostDisinfection
TP 09 - WELL 12 (EMERGENCY)33962FluoridationOther
TP 09 - WELL 12 (EMERGENCY)33962Inhibitor, PolyphosphateCorrosion control
  • 1 - 34 of 34
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.