Public water system record
Aqua Illinois-Oak Brook
Serves an area of DuPage County, IL that includes Oak Brook and Oakbrook Terrace · 5,361 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Aqua Illinois-Oak Brook in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Aqua Illinois-Oak Brook buys its water from Oak Brook.
Check whether Aqua Illinois-Oak Brook serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2025 | Active |
Where the water comes from
Aqua Illinois-Oak Brook buys its water from Oak Brook. It lists no wells or intakes of its own.
Buys water from
- Oak Brook Oak Brook, IL
Annual water quality report
Aqua Illinois-Oak Brook must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Illinois.
Certified drinking water labs by state EPA guidance for private wells