WEST CHICAGO, IL · DuPage County

WEST CHICAGO Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID): IL0430900
System type: Community Water System
Population served: 25,166
Service connections: 6,869
Ownership: local government
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2005 – September 30, 2005
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 8, 2005 – May 9, 2005
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
April 8, 2005 – May 9, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
April 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2005 – June 30, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
January 1, 2005 – March 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2005 – March 31, 2005
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2004 – June 30, 2004
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2003 – December 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2003 – March 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2002 – December 31, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 1999 – September 30, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 1998 – September 30, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1995 – August 31, 1995
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
February 1, 1995 – December 31, 1998
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 18, 1991 – January 17, 1995
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2005 – December 31, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2005 – September 30, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 8, 2005 – May 9, 2005	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 8, 2005 – May 9, 2005	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
April 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
April 1, 2005 – June 30, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2005 – March 31, 2005	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
January 1, 2005 – March 31, 2005	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 2004 – June 30, 2004	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2003 – December 31, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2003 – March 31, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2002 – December 31, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 1999 – September 30, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 1998 – September 30, 2002	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
August 1, 1995 – August 31, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
February 1, 1995 – December 31, 1998	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 18, 1991 – January 17, 1995	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

February 13, 2006State Public Notification received2 linked violations
January 27, 2006State Compliance achieved22 linked violations
January 10, 2006State Public Notification requested2 linked violations
January 10, 2006State Violation/Reminder Notice2 linked violations
November 15, 2005State Public Notification received2 linked violations
October 7, 2005State Public Notification requested2 linked violations
October 7, 2005State Violation/Reminder Notice2 linked violations
July 8, 2005State Public Notification requested2 linked violations
July 8, 2005State Violation/Reminder Notice2 linked violations
June 22, 2005State Public Notification received2 linked violations
May 16, 2005State Violation/Reminder Notice2 linked violations
May 9, 2005State Compliance achieved2 linked violations
May 9, 2005State Public Notification received3 linked violations
April 8, 2005State Public Notification requested2 linked violations
April 8, 2005State Violation/Reminder Notice2 linked violations
January 7, 2005State Public Notification requested1 linked violation
January 7, 2005State Violation/Reminder Notice1 linked violation
December 22, 2004State Public Notification received1 linked violation
October 19, 2004State Public Notification requested1 linked violation
October 19, 2004State Violation/Reminder Notice1 linked violation
September 29, 2004State Public Notification received1 linked violation
September 26, 2004State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 10, 2004State Violation/Reminder Notice1 linked violation
July 10, 2004State Public Notification requested1 linked violation
June 24, 2004State Public Notification received1 linked violation
April 10, 2004State Violation/Reminder Notice1 linked violation
April 10, 2004State Public Notification requested1 linked violation
March 22, 2004State Public Notification received2 linked violations
February 13, 2004State Bilateral Compliance Agreement signed22 linked violations
January 10, 2004State Public Notification requested1 linked violation
January 10, 2004State Violation/Reminder Notice1 linked violation
December 19, 2003State Formal Notice of Violation issued22 linked violations
September 26, 2003State Public Notification received2 linked violations
July 10, 2003State Violation/Reminder Notice1 linked violation
July 10, 2003State Public Notification requested1 linked violation
April 10, 2003State Violation/Reminder Notice1 linked violation
April 10, 2003State Public Notification requested1 linked violation
January 10, 2003State Violation/Reminder Notice1 linked violation
January 10, 2003State Public Notification requested1 linked violation
October 28, 1995State Public Notification requested1 linked violation
October 28, 1995State Violation/Reminder Notice1 linked violation
September 1, 1992State Public Notification received1 linked violation
August 24, 1992State Public Notification requested1 linked violation
March 20, 1992State Public Notification received1 linked violation
March 12, 1992State Public Notification requested1 linked violation
September 18, 1991State Public Notification received1 linked violation
June 20, 1991State Administrative/Compliance Order without penalty issued1 linked violation
May 15, 1991State Public Notification received1 linked violation
March 8, 1991State Public Notification received2 linked violations
January 30, 1991State Public Notification received1 linked violation
December 8, 1990State Public Notification requested1 linked violation
November 3, 1990State Violation/Reminder Notice2 linked violations
November 3, 1990State Public Notification requested3 linked violations

Contact

PATEL, MEHUL

630-293-2255

WEST CHICAGO, IL 60185