CINCINNATI, IN · Howard County
OAK BROOK ESTATES Water System
Consumer Confidence Report status
OAK BROOK ESTATES 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 no open violations for OAK BROOK ESTATES.
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 Indiana’s official records. Always confirm current status with Indiana before making decisions based on this information.
System facts
- System ID (PWSID)
- IN5234003
- System type
- Community Water System
- Population served
- 455
- Service connections
- 182
- Ownership
- privately owned
- Water source
- groundwater (wells)
OAK BROOK ESTATES is one of 675 community water systems in Indiana in the 500 or fewer people size category, serving 455 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 1980, all of which EPA lists as closed. Nothing has been added since 1980.
All 1 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 Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Regular
—Gross Alpha, Excl. Radon and U
June 30, 1980 – September 29, 1980
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 30, 1980 – September 29, 1980 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- October 11, 2024State Compliance achieved3 linked violations
- October 9, 2024State Violation/Reminder Notice1 linked violation
- October 25, 2022State Public Notification requested1 linked violation
- October 25, 2022State Violation/Reminder Notice1 linked violation
- June 6, 2018State Compliance achieved2 linked violations
- September 11, 2017State Compliance achieved3 linked violations
- September 6, 2017State Public Notification requested1 linked violation
- September 6, 2017State Violation/Reminder Notice1 linked violation
- August 22, 2017State Compliance achieved2 linked violations
- July 31, 2017State Public Notification requested1 linked violation
- July 31, 2017State Violation/Reminder Notice1 linked violation
- June 6, 2017State Compliance achieved2 linked violations
- April 13, 2017State Compliance achieved1 linked violation
- March 27, 2017State Public Notification received2 linked violations
- March 1, 2017State Violation/Reminder Notice1 linked violation
- February 16, 2017State Violation/Reminder Notice6 linked violations
- February 16, 2017State Public Notification requested1 linked violation
- February 16, 2017State Violation/Reminder Notice1 linked violation
- February 16, 2017State Public Notification requested1 linked violation
- December 29, 2016State Public Notification requested2 linked violations
- December 29, 2016State Violation/Reminder Notice2 linked violations
- December 16, 2016State Violation/Reminder Notice1 linked violation
- December 16, 2016State Violation/Reminder Notice1 linked violation
- November 5, 2015State Compliance achieved1 linked violation
- November 5, 2015State Violation/Reminder Notice1 linked violation
- September 8, 2015State Boil Water Order1 linked violation
- September 8, 2015State Public Notification requested1 linked violation
- September 8, 2015State Violation/Reminder Notice1 linked violation
- July 1, 2015State Compliance achieved2 linked violations
- July 1, 2015State Public Notification received2 linked violations
- February 9, 2015State Violation/Reminder Notice1 linked violation
- February 9, 2015State Public Notification requested1 linked violation
- February 9, 2015State Violation/Reminder Notice1 linked violation
- February 9, 2015State Public Notification requested1 linked violation
- December 29, 2014State Compliance achieved1 linked violation
- December 19, 2014State Violation/Reminder Notice1 linked violation
- April 11, 2013State Compliance achieved1 linked violation
- February 19, 2002State Violation/Reminder Notice6 linked violations
Common questions
Is OAK BROOK ESTATES required to publish a Consumer Confidence Report?
- Yes. OAK BROOK ESTATES 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 OAK BROOK ESTATES’s next Consumer Confidence Report due?
- OAK BROOK ESTATES’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OAK BROOK ESTATES have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for OAK BROOK ESTATES.
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
REYES, HEATHER
513-785-0505
CINCINNATI, OH 45241