YORK TOWNSHIP WATER SYSTEM

Illinois — Community Water System — PWSID: IL0430010

System Information

PWSID	IL0430010
System Name	YORK TOWNSHIP WATER SYSTEM
System Type	Community Water System
Water Source	Surface Water Purchased
Activity Status	Active
Owner Type	Private
EPA Region	05
Serves School	No
Wholesaler	No
First Reported	Jun 2, 1992
Last Reported	Dec 4, 2025

Location & Contact

State	Illinois
City	DARIEN
ZIP Code	60561
Address	17W440 North Frontage Rd
Organization	ADAMS, JONATHAN
Phone	630-964-7503

Population & Service

Population Served	1,423
Service Connections	480

Drinking Water Violations (171)

This water system has 171 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jul 1, 2025	—	Consumer Confidence Rule	Other	No	No	—	—	—	Unaddressed	—	Consumer Confidence Rule
Oct 1, 2012	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 11, 2013	Lead and Copper Rule
Oct 1, 2012	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 11, 2013	Lead and Copper Rule
Oct 1, 2012	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 11, 2013	Lead and Copper Rule
Oct 1, 2012	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 11, 2013	Lead and Copper Rule
Oct 2, 2011	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 11, 2011	Lead and Copper Rule
Oct 2, 2011	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 11, 2011	Lead and Copper Rule
Apr 2, 2011	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 11, 2011	Lead and Copper Rule
Jan 1, 2011	Dec 31, 2011	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2011	Nitrate Rule
Jan 1, 2011	Dec 31, 2011	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2011	Nitrate Rule
Jan 1, 2011	Dec 31, 2011	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2011	Nitrate Rule
Jan 1, 2011	Dec 31, 2011	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2011	Nitrate Rule
Oct 6, 2010	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Dec 23, 2010	Consumer Confidence Rule
Oct 6, 2010	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Dec 23, 2010	Consumer Confidence Rule
Oct 6, 2010	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Dec 23, 2010	Consumer Confidence Rule
Oct 6, 2010	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Dec 23, 2010	Consumer Confidence Rule
Aug 22, 2009	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 30, 2011	Lead and Copper Rule
Aug 22, 2009	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 30, 2011	Lead and Copper Rule
Aug 22, 2009	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 30, 2011	Lead and Copper Rule
Aug 22, 2009	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 30, 2011	Lead and Copper Rule
Aug 22, 2009	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 30, 2011	Lead and Copper Rule
Aug 22, 2009	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 30, 2011	Lead and Copper Rule
Jan 19, 2008	—	Public Notice	Other	No	No	—	—	—	Resolved	Feb 15, 2008	Public Notice Rule and Revised PN Rule
Jan 19, 2008	—	Public Notice	Other	No	No	—	—	—	Resolved	Feb 15, 2008	Public Notice Rule and Revised PN Rule
Jan 19, 2008	—	Public Notice	Other	No	No	—	—	—	Resolved	Feb 15, 2008	Public Notice Rule and Revised PN Rule
Jan 19, 2008	—	Public Notice	Other	No	No	—	—	—	Resolved	Feb 15, 2008	Public Notice Rule and Revised PN Rule
Nov 1, 2007	Nov 30, 2007	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2007	Total Coliform Rule
Nov 1, 2007	Nov 30, 2007	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2007	Total Coliform Rule
Nov 1, 2007	Nov 30, 2007	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2007	Total Coliform Rule
Nov 1, 2007	Nov 30, 2007	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2007	Total Coliform Rule
Feb 1, 2006	Feb 28, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Feb 28, 2006	Total Coliform Rule
Feb 1, 2006	Feb 28, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Feb 28, 2006	Total Coliform Rule
Feb 1, 2006	Feb 28, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Feb 28, 2006	Total Coliform Rule
Feb 1, 2006	Feb 28, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Feb 28, 2006	Total Coliform Rule
May 1, 2002	May 31, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 2002	Total Coliform Rule
May 1, 2002	May 31, 2002	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 2002	Total Coliform Rule
Mar 1, 2000	Mar 31, 2000	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Mar 31, 2000	Total Coliform Rule
Mar 1, 2000	Mar 31, 2000	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Mar 31, 2000	Total Coliform Rule
Oct 19, 1999	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jan 31, 2000	Consumer Confidence Rule
Oct 19, 1999	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jan 31, 2000	Consumer Confidence Rule
Oct 19, 1999	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jan 31, 2000	Consumer Confidence Rule
Oct 19, 1999	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jan 31, 2000	Consumer Confidence Rule
Oct 19, 1999	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jan 31, 2000	Consumer Confidence Rule
Sep 1, 1999	Sep 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Sep 30, 1999	Total Coliform Rule
Sep 1, 1999	Sep 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Sep 30, 1999	Total Coliform Rule
May 1, 1998	May 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 1998	Total Coliform Rule
May 1, 1998	May 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 1998	Total Coliform Rule
Jun 1, 1995	Jun 30, 1995	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Jun 30, 1995	Total Coliform Rule
Jun 1, 1995	Jun 30, 1995	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Jun 30, 1995	Total Coliform Rule
Oct 1, 1994	Dec 31, 1994	Heptachlor epoxide	MR	No	Yes	—	0.0002 mg/L	—	Resolved	Dec 31, 1994	Synthetic Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

Browse All Water Systems Water Safety Stats Water Safety Home

Browse All Water Systems Water Systems in Illinois