NORTHBROOK, IL · McHenry County

OAKBROOK ESTATES MHP 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): IL1115125
System type: Community Water System
Population served: 1,012
Service connections: 405
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – June 13, 2025
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1994 – April 30, 1994
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1993 – September 30, 1993
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1993 – August 31, 1993
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
August 1, 1993 – August 31, 1993
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
October 17, 2024 – June 13, 2025	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Resolved
April 1, 1994 – April 30, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 1993 – September 30, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 1993 – August 31, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
August 1, 1993 – August 31, 1993	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

August 12, 2025State Public Notification received5 linked violations
July 3, 2025State Violation/Reminder Notice2 linked violations
July 2, 2025State Public Notification requested2 linked violations
July 2, 2025State Violation/Reminder Notice1 linked violation
June 11, 1994State Public Notification requested1 linked violation
June 11, 1994State Public Notification requested2 linked violations
June 11, 1994State Violation/Reminder Notice1 linked violation
November 8, 1993State Public Notification received1 linked violation
October 23, 1993State Public Notification requested1 linked violation
October 23, 1993State Public Notification requested1 linked violation
October 23, 1993State Violation/Reminder Notice1 linked violation
October 12, 1993State Public Notification received2 linked violations
October 12, 1993State Public Notification received2 linked violations
October 12, 1993State Public Notification received3 linked violations
September 26, 1993State Public Notification requested3 linked violations

Contact

VRETZ, JONATHAN

847-881-2237

NORTHBROOK, IL 60062