LYONS, IL · Cook County

LYONS Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): IL0311710
System type: Community Water System
Population served: 10,304
Service connections: 2,975
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – September 4, 2020
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1998 – June 30, 1998
Archived
Public Education
Health-based
Lead and Copper Rule
January 1, 1996 – March 3, 1997
Resolved
Public Education
Health-based
Lead and Copper Rule
January 1, 1994 – February 5, 1995
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
December 7, 1992 – January 28, 1994
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1992 – September 30, 1992
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 1991 – March 31, 1991
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
March 1, 1991 – March 31, 1991
Archived

Unaddressed no corrective action on record yetResolved 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
July 2, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
July 1, 2020 – September 4, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 1998 – June 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 1996 – March 3, 1997	Public Education	Lead and Copper Rule	Health-based	Resolved
January 1, 1994 – February 5, 1995	Public Education	Lead and Copper Rule	Health-based	Resolved
December 7, 1992 – January 28, 1994	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
September 1, 1992 – September 30, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 1991 – March 31, 1991	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 1991 – March 31, 1991	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

July 3, 2025State Public Notification requested1 linked violation
July 3, 2025State Violation/Reminder Notice1 linked violation
September 4, 2020State Compliance achieved1 linked violation
July 21, 2020State Violation/Reminder Notice1 linked violation
April 19, 1999State Compliance achieved1 linked violation
April 16, 1999State Compliance achieved2 linked violations
August 15, 1998State Public Notification requested1 linked violation
August 15, 1998State Violation/Reminder Notice1 linked violation
March 3, 1997State Compliance achieved1 linked violation
February 11, 1997State Violation/Reminder Notice1 linked violation
February 11, 1997State Public Notification requested1 linked violation
February 5, 1995State Compliance achieved2 linked violations
April 5, 1994State Violation/Reminder Notice2 linked violations
April 5, 1994State Violation/Reminder Notice1 linked violation
April 5, 1994State Public Notification requested1 linked violation
January 28, 1994State Compliance achieved1 linked violation
October 24, 1992State Violation/Reminder Notice1 linked violation
October 24, 1992State Public Notification requested1 linked violation
October 2, 1992State Public Notification received1 linked violation
April 25, 1991State Public Notification requested2 linked violations

Contact

SHEAHAN, THOMAS

708-442-4500

LYONS, IL 60534