U.S. flag

An official website of the United States government

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDIL1110950
PWS NameWOODSTOCK
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served25630
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
OtherPublic Notification Violation for NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice7144787Returned to Compliance05-MAR-2025 - No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)7144789Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM7144788Returned to Compliance01-JAN-202531-MAR-2025No
TTOCCT/SOWT Study/RecommendationLead and Copper RuleLead and Copper Rule7144786Returned to Compliance02-APR-2024 - Yes
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule3994196Returned to Compliance01-JAN-1997 - No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)3549796Known01-AUG-199631-AUG-1996Yes
MRMonitoring, Repeat Major (TCR)Total Coliform RuleColiform (TCR)3549896Known01-AUG-199631-AUG-1996No
MCLMaximum Contaminant Level Violation, Acute (TCR)Total Coliform RuleColiform (TCR)1672893Known01-DEC-199231-DEC-1992Yes
MRMonitoring, Routine Minor (TCR)Total Coliform RuleColiform (TCR)1304091Known01-FEB-199128-FEB-1991No
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U7144780Known30-JUN-197729-JUN-1981No
  • 1 - 10 of 10

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
72008077144788SOXState Compliance achieved14-MAY-2025State -
72008077144789SOXState Compliance achieved14-MAY-2025State -
72008047144787SIAState Violation/Reminder Notice19-MAR-2025State -
72008027144786SIFState Public Notification received13-MAR-2025State -
72007983994196SOXState Compliance achieved09-APR-1998State -
60318973549796SIEState Public Notification requested02-NOV-1996State -
60318973549896SIEState Public Notification requested02-NOV-1996State -
17834931672893SIEState Public Notification requested06-FEB-1993State -
9138911304091SIEState Public Notification requested11-APR-1991State -
  • 1 - 9 of 9

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WL22149-WELL 1 PROPERLY ABANDONED20778YesWell Ground waterOtherInactive
WL01220-WELL 12 IS 700 FT WEST OF WELL 819012YesWell Ground waterPermanentActive
WL01108-WELL 1118904YesWell Ground waterPermanentActive
WL00630-WELL 7A18440YesWell Ground waterPermanentActive
WL00609-WELL 10 N WATER PLT - RT 4718420YesWell Ground waterPermanentActive
WL00608-WELL 9 S OF INTERSECT18419YesWell Ground waterPermanentActive
WL00607-WELL 8 35 FT W 52 FT18418YesWell Ground waterPermanentActive
WL22154-WELL 7 PROPERLY ABANDONED20783YesWell Ground waterOtherInactive
WL22153-WELL 6 PROPERLY ABANDONED20782YesWell Ground waterOtherInactive
WL22152-WELL 5 PROPERLY ABANDONED20781YesWell Ground waterOtherInactive
WL22151-WELL 4 PROPERLY ABANDONED20780YesWell Ground waterOtherInactive
WL22150-WELL 3 PROPERLY ABANDONED20779YesWell Ground waterOtherInactive
WOODSTOCK24411NoDistribution System/Zone - - Active
SCHOOL LEAD SAMPLING46050NoDistribution System/Zone - - Active
CHILDCARE FACILITY LEAD SAMPLING46060NoDistribution System/Zone - - Active
PF03-BSTR STA11210 MCCONNELL RD32451NoPump Facility - - Active
PF04-BORDEN ST. BOOSTER STATION32452NoPump Facility - - Active
PF05-CENTEGRA HOSPITAL B. S.10501 RT1432508NoPump Facility - - Active
GENERIC FINISHED SAMPLING STATION28070NoSampling Station - - Active
GENERIC RAW SAMPLING STATION30492NoSampling Station - - Active
WATER QUALITY SAMPLING44210NoSampling Station - - Active
WATER QUALITY SAMPLING44211NoSampling Station - - Active
DISTRIBUTION ELEVATED STORAGE11464NoStorage - - Active
DISTRIBUTION GROUND STORAGE12315NoStorage - - Active
TAP 01 GROUND STORAGE12941NoStorage - - Active
TAP 02 GROUND STORAGE12942NoStorage - - Active
TP01-211 S. FIRST STREET TREATMENT PLANT16511NoTreatment Plant - - Active
TP02-1500 N. SEMINARY TREATMENT PLANT16512NoTreatment Plant - - Active
  • 1 - 28 of 28

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TP01-211 S. FIRST STREET TREATMENT PLANT16511FluoridationOther
TP01-211 S. FIRST STREET TREATMENT PLANT16511Aeration, Slat TrayIron removal
TP01-211 S. FIRST STREET TREATMENT PLANT16511Gaseous Chlorination, PostDisinfection
TP01-211 S. FIRST STREET TREATMENT PLANT16511Filtration, Rapid SandIron removal
TP01-211 S. FIRST STREET TREATMENT PLANT16511Inhibitor, PolyphosphateCorrosion control
TP01-211 S. FIRST STREET TREATMENT PLANT16511SequestrationCorrosion control
TP01-211 S. FIRST STREET TREATMENT PLANT16511Ion ExchangeSoftening (hardness removal)
TP02-1500 N. SEMINARY TREATMENT PLANT16512FluoridationOther
TP02-1500 N. SEMINARY TREATMENT PLANT16512Inhibitor, PolyphosphateCorrosion control
TP02-1500 N. SEMINARY TREATMENT PLANT16512Gaseous Chlorination, PostDisinfection
TP02-1500 N. SEMINARY TREATMENT PLANT16512Filtration, Rapid SandIron removal
TP02-1500 N. SEMINARY TREATMENT PLANT16512Aeration, Slat TrayIron removal
TP02-1500 N. SEMINARY TREATMENT PLANT16512Ion ExchangeSoftening (hardness removal)
  • 1 - 13 of 13

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.