Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL0430010
PWS Name	YORK TOWNSHIP WATER SYSTEM
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	1423
County Served	DuPage

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	5524238	Open	01-JUL-2025	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	5524224	Returned to Compliance	01-OCT-2012	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	5524217	Returned to Compliance	02-OCT-2011	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	5524216	Returned to Compliance	02-APR-2011	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	5524223	Returned to Compliance	01-JAN-2011	31-DEC-2011	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	5524211	Returned to Compliance	06-OCT-2010	-	No
TT	OCCT/SOWT Treatment Installation/Demonstration	Lead and Copper Rule	Lead and Copper Rule	5524210	Returned to Compliance	22-AUG-2009	-	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	5524208	Returned to Compliance	19-JAN-2008	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	5524209	Returned to Compliance	19-JAN-2008	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5524207	Returned to Compliance	01-NOV-2007	30-NOV-2007	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5524206	Returned to Compliance	01-FEB-2006	28-FEB-2006	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5520902	Known	01-MAY-2002	31-MAY-2002	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	5121700	Known	01-MAR-2000	31-MAR-2000	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	4920900	Returned to Compliance	19-OCT-1999	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	4658499	Known	01-SEP-1999	30-SEP-1999	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	4095398	Known	01-MAY-1998	31-MAY-1998	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2969495	Known	01-JUN-1995	30-JUN-1995	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	2873795	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	4658395	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	4658295	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	2873695	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	2873595	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	2873995	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	2873395	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	2873295	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	2873195	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	2873095	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	4658195	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	2872995	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	4658095	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	4657995	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	4657895	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	4657795	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	4657695	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	4657595	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	4657495	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	4657395	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	4657295	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	4657195	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	4657095	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	4656995	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	2872895	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	2872795	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	2872695	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	4656895	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	2874195	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	2874095	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	2874295	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2601594	Known	01-SEP-1994	30-SEP-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2601494	Known	01-AUG-1994	31-AUG-1994	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9016553	5524238	SIA	State Violation/Reminder Notice	20-SEP-2025	State	-
9016541	5524224	SOX	State Compliance achieved	11-SEP-2013	State	Collected samples in 2013YR. JL
9016538	5524223	SIF	State Public Notification received	02-JUL-2012	State	-
9016531	5524217	SOX	State Compliance achieved	11-OCT-2011	State	Received LCRN form
9016531	5524216	SOX	State Compliance achieved	11-OCT-2011	State	Received LCRN form
9016517	5524210	SOX	State Compliance achieved	30-JUN-2011	State	10/17/2011: See VN file for long story, this system didn't install and now has 2 good rounds of monitoring so close schedules and reduce. JL
9016521	5524211	SFK	State Bilateral Compliance Agreement signed	07-JAN-2011	State	VN # W-2010-00588 for CCR 72 A/A/C violation
9016512	5524207	SOX	State Compliance achieved	01-JUN-2008	State	-
9016510	5524208	SOX	State Compliance achieved	15-FEB-2008	State	-
9016510	5524209	SOX	State Compliance achieved	15-FEB-2008	State	-
9016506	5524206	SOX	State Compliance achieved	01-SEP-2006	State	Supply without a coliform violation for 6 months.
223302	5520902	SIE	State Public Notification requested	29-AUG-2002	State	-
5500	5121700	SIE	State Public Notification requested	15-MAY-2000	State	-
9015300	4920900	SFK	State Bilateral Compliance Agreement signed	28-MAR-2000	State	-
8362800	4658499	SIE	State Public Notification requested	15-NOV-1999	State	-
7316898	4095398	SIE	State Public Notification requested	15-JUL-1998	State	-
4750895	2969495	SIE	State Public Notification requested	26-AUG-1995	State	-
4121495	2873795	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873995	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2874095	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2874195	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2874295	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4656895	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4656995	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657095	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657195	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657295	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657395	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657595	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657695	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657795	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657895	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657995	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4658095	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4658195	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4658295	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4658395	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873695	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873595	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873395	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873295	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873195	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2873095	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2872995	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2872895	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2872795	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	2872695	SIE	State Public Notification requested	16-MAR-1995	State	-
4121495	4657495	SIE	State Public Notification requested	16-MAR-1995	State	-
4355195	2428694	SOX	State Compliance achieved	31-DEC-1994	State	-
4355195	2081593	SOX	State Compliance achieved	31-DEC-1994	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC01-TEMPORARY CONNECTION FROM OAK BROOK	40750	Yes	Consecutive Connection	Surface water	Other	Inactive
WL00672-W2 INACTIVE	18482	Yes	Well	Ground water	Other	Inactive
WL00671-W1 INACTIVE IRRIGATION USE	18481	Yes	Well	Ground water	Other	Inactive
CC02-DUPAGE WATER COMMISSION METER VAULT	40882	Yes	Consecutive Connection	Surface water	Permanent	Active
YORK TOWNSHIP WATER SYSTEM	23562	No	Distribution System/Zone	-	-	Active
HIGHLAND HILLS SD CUSTOMERS	41432	No	Distribution System/Zone	-	-	Active
SCHOOL	46082	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	46083	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27221	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29643	No	Sampling Station	-	-	Active
ELEV1- 1.0 MG ELEVATED TANK	41390	No	Storage	-	-	Active
DISTRIBUTION GROUND STORAGE	12120	No	Storage	-	-	Inactive
TAP 01 GROUND STORAGE	12713	No	Storage	-	-	Inactive
TAP 02 GROUND STORAGE	12714	No	Storage	-	-	Inactive
TP01-WELL 1 INACTIVE	15138	No	Treatment Plant	-	-	Inactive
TP02-WELL 2 INACTIVE	15139	No	Treatment Plant	-	-	Inactive

1 - 16 of 16

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP01-WELL 1 INACTIVE	15138	Gaseous Chlorination, Pre	Disinfection
TP02-WELL 2 INACTIVE	15139	Gaseous Chlorination, Pre	Disinfection

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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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