NORTHBROOK, IL · McHenry County
OAKBROOK ESTATES MHP Water System
Consumer Confidence Report status
OAKBROOK ESTATES MHP must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show 1 item for OAKBROOK ESTATES MHP that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
OAKBROOK ESTATES MHP is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 1,012 people from groundwater.
As of August 1, 2026, its federal record holds 6 entries between 1993 and 2025, of which 1 remains open; none are health-based.
Of the 6, 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules and the Lead and Copper Rule.
Violation history
Notification, Known or Potential LSL
—LEAD AND COPPER RULE REVISIONS
July 2, 2025
UnaddressedLSL Reporting
—LEAD AND COPPER RULE REVISIONS
October 17, 2024 – June 13, 2025
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
April 1, 1994 – April 30, 1994
ArchivedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
September 1, 1993 – September 30, 1993
ArchivedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
August 1, 1993 – August 31, 1993
ArchivedMonitoring, 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 Public Notification requested2 linked violations
- July 3, 2025State Violation/Reminder Notice2 linked violations
- July 2, 2025State Violation/Reminder Notice1 linked violation
- July 2, 2025State Public Notification requested2 linked violations
- June 11, 1994State Public Notification requested1 linked violation
- June 11, 1994State Violation/Reminder Notice2 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 Violation/Reminder Notice1 linked violation
- October 23, 1993State Public Notification requested1 linked violation
- October 23, 1993State Violation/Reminder Notice3 linked violations
- October 12, 1993State Public Notification received2 linked violations
- October 12, 1993State Public Notification received2 linked violations
- September 26, 1993State Public Notification requested3 linked violations
Common questions
Is OAKBROOK ESTATES MHP required to publish a Consumer Confidence Report?
- Yes. OAKBROOK ESTATES MHP is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is OAKBROOK ESTATES MHP’s next Consumer Confidence Report due?
- OAKBROOK ESTATES MHP’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OAKBROOK ESTATES MHP have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 1 item for OAKBROOK ESTATES MHP that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
VRETZ, JONATHAN
847-881-2237
NORTHBROOK, IL 60062