POSEN, IL · Cook County

POSEN 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): IL0312520
System type: Community Water System
Population served: 5,331
Service connections: 1,754
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 – July 2, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2025
Unaddressed
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2020 – February 2, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – July 10, 2017
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2014 – September 8, 2014
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2014 – August 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2014 – August 31, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2013 – June 30, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – August 2, 2012
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2007 – December 31, 2007
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2004 – June 30, 2005
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2001 – November 30, 2001
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2001 – October 31, 2001
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2001 – February 28, 2001
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 2000 – August 31, 2000
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2000 – July 31, 2000
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1999 – April 30, 1999
Archived
Public Education
Health-based
Lead and Copper Rule
January 1, 1996 – February 9, 1998
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
July 2, 2025 – July 2, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Resolved
July 1, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
December 30, 2020 – February 2, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2017 – July 10, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2014 – September 8, 2014	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2014 – August 31, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2014 – August 31, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
June 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2012 – August 2, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2007 – December 31, 2007	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2004 – June 30, 2005	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
November 1, 2001 – November 30, 2001	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 2001 – October 31, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
February 1, 2001 – February 28, 2001	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
August 1, 2000 – August 31, 2000	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
July 1, 2000 – July 31, 2000	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
April 1, 1999 – April 30, 1999	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
January 1, 1996 – February 9, 1998	Public Education	Lead and Copper Rule	Health-based	Resolved

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

Enforcement actions

September 11, 2025State Public Notification received1 linked violation
September 6, 2025State Violation/Reminder Notice1 linked violation
July 3, 2025State Public Notification requested1 linked violation
July 3, 2025State Violation/Reminder Notice1 linked violation
July 2, 2025State Compliance achieved1 linked violation
February 2, 2021State Compliance achieved1 linked violation
January 6, 2021State Violation/Reminder Notice1 linked violation
July 18, 2017State Violation/Reminder Notice1 linked violation
July 10, 2017State Compliance achieved1 linked violation
September 23, 2015State Compliance achieved2 linked violations
June 30, 2015State Public Notification received2 linked violations
October 21, 2014State Public Notification requested2 linked violations
October 21, 2014State Violation/Reminder Notice2 linked violations
September 8, 2014State Compliance achieved1 linked violation
August 11, 2014State Violation/Reminder Notice1 linked violation
August 15, 2013State Public Notification received1 linked violation
August 2, 2013State Compliance achieved1 linked violation
July 17, 2013State Violation/Reminder Notice1 linked violation
July 17, 2013State Public Notification requested1 linked violation
August 2, 2012State Compliance achieved1 linked violation
July 12, 2012State Violation/Reminder Notice1 linked violation
February 4, 2008State Compliance achieved1 linked violation
January 30, 2008State Violation/Reminder Notice1 linked violation
June 30, 2005State Compliance achieved1 linked violation
July 1, 2004State Violation/Reminder Notice1 linked violation
December 15, 2001State Violation/Reminder Notice3 linked violations
May 15, 2001State Violation/Reminder Notice2 linked violations
December 15, 1999State Public Notification requested1 linked violation
December 15, 1999State Violation/Reminder Notice1 linked violation
June 15, 1999State Public Notification requested1 linked violation
June 15, 1999State Violation/Reminder Notice1 linked violation
August 15, 1998State Public Notification requested1 linked violation
August 15, 1998State Violation/Reminder Notice1 linked violation
April 9, 1998State Compliance achieved1 linked violation
February 9, 1998State Compliance achieved1 linked violation
February 11, 1997State Public Notification requested1 linked violation
February 11, 1997State Violation/Reminder Notice1 linked violation
March 21, 1994State Compliance achieved1 linked violation

Contact

MARROQUIN, JULIO

708-293-2620

POSEN, IL 60469