WILLOWBROOK
Illinois - Community Water System - PWSID: IL0431100
System Information
| PWSID | IL0431100 |
| System Name | WILLOWBROOK |
| 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 | WILLOWBROOK |
| ZIP Code | 60527 |
| Address | 835 Midway Dr |
| Organization | HALLORAN, SEAN |
| Phone | 630-323-8215 |
Population & Service
| Population Served | 9,000 |
| Service Connections | 2,207 |
Drinking Water Violations (33)
This water system has 33 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 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Jul 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Oct 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Feb 5, 2024 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Feb 5, 2024 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Feb 5, 2024 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Feb 5, 2024 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Aug 2, 2021 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Aug 2, 2021 | - | |
| Dec 30, 2020 | - | MR | No | No | - | TT | - | Resolved | Jan 14, 2021 | - | |
| Dec 30, 2020 | - | MR | No | No | - | TT | - | Resolved | Jan 14, 2021 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 29, 2013 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 29, 2013 | - | |
| Jul 1, 1993 | Jul 31, 1993 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1993 | - | |
| Jul 1, 1993 | Jul 31, 1993 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1993 | - | |
| Jul 1, 1993 | Jul 31, 1993 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1993 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Dec 6, 1985 | Dec 5, 1989 | MCL | Yes | No | 6.1 | 5 pCi/L | - | Archived | Dec 5, 1989 | - | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | - | 15 pCi/L | - | Archived | Jun 29, 1981 | - | |
| - | - | - | No | No | - | - | - | - | - | - |
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.