OAK BROOK
Illinois - Community Water System - PWSID: IL0430700
System Information
| PWSID | IL0430700 |
| System Name | OAK BROOK |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1981 |
| Last Reported | Feb 26, 2026 |
Location & Contact
| State | Illinois |
| City | OAK BROOK |
| ZIP Code | 60523 |
| Address | 3003 Jorie Blvd |
| Organization | O'MALLEY, TIM |
| Phone | 630-368-5276 |
Population & Service
| Population Served | 9,400 |
| Service Connections | 3,295 |
Drinking Water Violations (54)
This water system has 54 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Jun 11, 2025 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Jun 11, 2025 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Feb 27, 2024 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Feb 27, 2024 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Feb 27, 2024 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Feb 27, 2024 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | No | - | 4.0 mg/L | - | Resolved | Mar 8, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | No | - | 4.0 mg/L | - | Resolved | Mar 8, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | No | - | 4.0 mg/L | - | Resolved | Mar 8, 2005 | - | |
| Jan 1, 2005 | Mar 31, 2005 | MR | No | No | - | 4.0 mg/L | - | Resolved | Mar 8, 2005 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Oct 1, 1989 | Sep 30, 1993 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Mar 9, 1992 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Dec 1, 1985 | Nov 30, 1989 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Resolved | Jun 11, 1986 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Oct 4, 1985 | Oct 3, 1989 | MCL | Yes | No | 7 | 5 pCi/L | - | Resolved | Oct 3, 1989 | - | |
| Dec 2, 1981 | Dec 1, 1985 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Archived | Dec 1, 1985 | - | |
| Dec 2, 1981 | Dec 1, 1985 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Archived | Dec 1, 1985 | - | |
| Dec 2, 1981 | Dec 1, 1985 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Archived | Dec 1, 1985 | - | |
| Dec 2, 1981 | Dec 1, 1985 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Archived | Dec 1, 1985 | - | |
| Dec 2, 1981 | Dec 1, 1985 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Archived | Dec 1, 1985 | - | |
| Dec 2, 1981 | Dec 1, 1985 | MCL | Yes | No | 18.5 | 15 pCi/L | - | Archived | Dec 1, 1985 | - | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | - | 15 pCi/L | - | Archived | Jun 29, 1981 | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.