MARKHAM, IL · Cook County

MARKHAM Water System

Current status

2 items on record are 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): IL0311770
System type: Community Water System
Population served: 12,500
Service connections: 4,138
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
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2025 – September 30, 2025
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2025
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 11, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 15, 2023 – June 20, 2024
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 15, 2023 – June 20, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2022 – May 31, 2022
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2022 – June 23, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2020 – March 29, 2021
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2013 – September 19, 2013
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2011 – December 8, 2011
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2011 – February 21, 2011
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2011 – March 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2011 – March 31, 2011
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 2011 – January 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2007 – September 30, 2007
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2007 – September 30, 2007
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2004 – December 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2003 – June 30, 2003
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 1997 – January 31, 1997
Archived
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 1994 – December 31, 1995
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1994 – October 31, 1994
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1994 – August 31, 1994
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1994 – June 30, 1994
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1994 – May 31, 1994
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1994 – April 30, 1994
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1993 – September 30, 1993
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1993 – August 31, 1993
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1993 – May 31, 1993
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
May 1, 1993 – May 31, 1993
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1992 – March 31, 1992
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1992 – January 31, 1992
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, 2025 – September 30, 2025	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
July 1, 2023 – July 11, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 15, 2023 – June 20, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
June 15, 2023 – June 20, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
May 1, 2022 – May 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2022 – June 23, 2022	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
December 30, 2020 – March 29, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
August 1, 2013 – August 31, 2013	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2013 – September 19, 2013	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2011 – December 8, 2011	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2011 – February 21, 2011	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2011 – March 31, 2011	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2011 – March 31, 2011	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2011 – January 31, 2011	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2007 – September 30, 2007	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2007 – September 30, 2007	Monitoring and Reporting (DBP)	TTHM	—	Resolved
December 1, 2004 – December 31, 2004	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 2003 – June 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1997 – January 31, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1994 – December 31, 1995	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
October 1, 1994 – October 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 1994 – August 31, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 1, 1994 – June 30, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 1994 – May 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
April 1, 1994 – April 30, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1993 – September 30, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 1993 – August 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 1993 – May 31, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
May 1, 1993 – May 31, 1993	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 1992 – March 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1992 – January 31, 1992	Monitoring, Routine Major (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

October 30, 2025State Compliance achieved1 linked violation
October 14, 2025State Public Notification requested1 linked violation
October 14, 2025State Violation/Reminder Notice1 linked violation
August 5, 2025State Violation/Reminder Notice1 linked violation
July 3, 2025State Violation/Reminder Notice1 linked violation
July 3, 2025State Public Notification requested9 linked violations
June 24, 2024State Public Notification received1 linked violation
June 24, 2024State Public Notification received1 linked violation
June 20, 2024State Compliance achieved1 linked violation
June 20, 2024State Compliance achieved1 linked violation
August 10, 2023State Violation/Reminder Notice1 linked violation
August 10, 2023State Violation/Reminder Notice1 linked violation
July 24, 2023State Violation/Reminder Notice1 linked violation
July 11, 2023State Compliance achieved1 linked violation
June 23, 2022State Compliance achieved2 linked violations
June 14, 2022State Violation/Reminder Notice1 linked violation
June 14, 2022State Public Notification requested1 linked violation
June 14, 2022State Violation/Reminder Notice1 linked violation
June 14, 2022State Public Notification requested1 linked violation
March 29, 2021State Compliance achieved1 linked violation
January 6, 2021State Violation/Reminder Notice1 linked violation
October 21, 2013State Public Notification received1 linked violation
October 21, 2013State Public Notification received1 linked violation
September 19, 2013State Compliance achieved2 linked violations
September 18, 2013State Public Notification requested1 linked violation
September 18, 2013State Violation/Reminder Notice1 linked violation
September 18, 2013State Public Notification requested1 linked violation
September 18, 2013State Violation/Reminder Notice1 linked violation
April 4, 2012State Public Notification received2 linked violations
February 9, 2012State Public Notification received2 linked violations
December 8, 2011State Compliance achieved1 linked violation
September 28, 2011State Violation/Reminder Notice1 linked violation
May 4, 2011State Compliance achieved2 linked violations
April 14, 2011State Violation/Reminder Notice9 linked violations
April 14, 2011State Public Notification requested2 linked violations
February 21, 2011State Compliance achieved2 linked violations
February 16, 2011State Violation/Reminder Notice1 linked violation
February 16, 2011State Public Notification requested1 linked violation
February 16, 2011State Violation/Reminder Notice1 linked violation
February 16, 2011State Public Notification requested1 linked violation
October 15, 2007State Compliance achieved2 linked violations
October 11, 2007State Violation/Reminder Notice4 linked violations
October 5, 2005State Public Notification received2 linked violations
September 7, 2005State Public Notification requested1 linked violation
September 7, 2005State Public Notification requested3 linked violations
July 1, 2005State Compliance achieved1 linked violation
February 7, 2005State Violation/Reminder Notice1 linked violation
April 9, 1998State Compliance achieved1 linked violation
March 20, 1997State Violation/Reminder Notice2 linked violations
March 20, 1997State Public Notification requested2 linked violations
December 31, 1995State Compliance achieved1 linked violation
September 17, 1995State Violation/Reminder Notice1 linked violation
September 17, 1995State Public Notification requested1 linked violation
June 30, 1995State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 17, 1994State Violation/Reminder Notice1 linked violation
December 17, 1994State Public Notification requested1 linked violation
October 15, 1994State Violation/Reminder Notice1 linked violation
October 15, 1994State Public Notification requested1 linked violation
August 20, 1994State Violation/Reminder Notice1 linked violation
August 20, 1994State Public Notification requested1 linked violation
August 7, 1994State Public Notification received1 linked violation
August 7, 1994State Public Notification received1 linked violation
August 2, 1994State Public Notification received1 linked violation
July 16, 1994State Public Notification requested1 linked violation
July 16, 1994State Violation/Reminder Notice1 linked violation
July 16, 1994State Public Notification requested1 linked violation
June 11, 1994State Violation/Reminder Notice1 linked violation
June 11, 1994State Public Notification requested1 linked violation
October 23, 1993State Violation/Reminder Notice1 linked violation
October 23, 1993State Public Notification requested1 linked violation
September 26, 1993State Public Notification requested1 linked violation
September 26, 1993State Violation/Reminder Notice1 linked violation
June 26, 1993State Public Notification requested3 linked violations
June 26, 1993State Violation/Reminder Notice3 linked violations
June 3, 1993State Public Notification received1 linked violation
May 29, 1993State Public Notification requested1 linked violation
May 29, 1993State Violation/Reminder Notice1 linked violation
February 28, 1993State Public Notification requested2 linked violations
February 28, 1993State Violation/Reminder Notice2 linked violations
April 24, 1992State Public Notification requested1 linked violation
April 24, 1992State Violation/Reminder Notice1 linked violation
March 1, 1992State Violation/Reminder Notice1 linked violation
March 1, 1992State Public Notification requested1 linked violation
September 29, 1991State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
September 30, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
September 30, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
September 30, 1989State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 1, 1989State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 1, 1989State Public Notification requestedgeneral compliance action — not tied to a specific violation on record

Contact

VAUGHT, MELISSA

708-331-4905

MARKHAM, IL 60428