MOUNT PROSPECT
Illinois - Community Water System - PWSID: IL0311980
System Information
| PWSID | IL0311980 |
| System Name | MOUNT PROSPECT |
| 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 | MOUNT PROSPECT |
| ZIP Code | 60056 |
| Address | MOUNT PROSPECT PUBLIC WORKS |
| Organization | DORSEY, SEAN P. |
| Phone | 847-870-5640 |
Population & Service
| Population Served | 41,000 |
| Service Connections | 11,590 |
Drinking Water Violations (50)
This water system has 50 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, 2025 | - | Other | No | No | - | - | - | Resolved | Nov 4, 2025 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Nov 4, 2025 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | No | - | - | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | No | - | - | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | No | - | - | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | No | - | - | - | Resolved | Dec 31, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Dec 30, 2020 | - | MR | No | No | - | TT | - | Resolved | Jan 13, 2021 | - | |
| Dec 30, 2020 | - | MR | No | No | - | TT | - | Resolved | Jan 13, 2021 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Jul 5, 2018 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Jul 5, 2018 | - | |
| Jul 1, 2016 | - | Other | No | No | - | - | - | Resolved | Sep 15, 2016 | - | |
| Jul 1, 2016 | - | Other | No | No | - | - | - | Resolved | Sep 15, 2016 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1992 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1992 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | Oct 31, 1992 | - | |
| Oct 1, 1992 | Oct 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | Oct 31, 1992 | - | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | - | 15 pCi/L | - | Archived | Jun 29, 1981 | - | |
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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.