OSWEGO
Illinois - Community Water System - PWSID: IL0930150
System Information
| PWSID | IL0930150 |
| System Name | OSWEGO |
| System Type | Community Water System |
| Water Source | Ground Water |
| 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 | OSWEGO |
| ZIP Code | 60543 |
| Address | 100 Parkers Mill |
| Organization | CASSIDY, CURTIS |
| Phone | 630-551-2189 |
Population & Service
| Population Served | 38,169 |
| Service Connections | 12,887 |
Drinking Water Violations (285)
This water system has 285 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 1, 2024 | Sep 30, 2024 | MR | No | No | - | 4.0 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Sep 1, 2024 | Sep 30, 2024 | MR | No | No | - | 4.0 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Sep 1, 2024 | Sep 30, 2024 | MR | No | No | - | 4.0 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Sep 1, 2024 | Sep 30, 2024 | MR | No | No | - | 4.0 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 9, 2023 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 9, 2023 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Jun 25, 2018 | - | |
| Jul 1, 2017 | - | Other | No | No | - | - | - | Resolved | Jun 25, 2018 | - | |
| May 14, 2017 | - | Other | No | No | - | - | - | Resolved | May 15, 2017 | - | |
| May 14, 2017 | - | Other | No | No | - | - | - | Resolved | May 15, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 6 PCI/L | 5 pCi/L | 5 | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 6 PCI/L | 5 pCi/L | 5 | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 6 PCI/L | 5 pCi/L | 5 | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 6 PCI/L | 5 pCi/L | 5 | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 6 PCI/L | 5 pCi/L | 5 | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MCL | Yes | No | 6 PCI/L | 5 pCi/L | 5 | Resolved | Mar 31, 2017 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Sep 30, 2016 | - | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2014 | - | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2014 | - | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2014 | - | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2014 | - | |
| Apr 1, 2010 | Jun 30, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2010 | - | |
| Apr 1, 2010 | Jun 30, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2010 | - | |
| Apr 1, 2010 | Jun 30, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2010 | - | |
| Apr 1, 2010 | Jun 30, 2010 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2010 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2007 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Aug 14, 2006 | - | |
| Jul 1, 2006 | Sep 30, 2006 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Aug 14, 2006 | - | |
| Apr 1, 2006 | Jun 30, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | May 23, 2006 | - | |
| Apr 1, 2006 | Jun 30, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | May 23, 2006 | - | |
| Apr 1, 2006 | Jun 30, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | May 23, 2006 | - | |
| Apr 1, 2006 | Jun 30, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | May 23, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Mar 31, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Mar 31, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Mar 31, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Mar 31, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Mar 31, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Mar 31, 2006 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MCL | Yes | No | 7.225 | 5 pCi/L | - | Resolved | Dec 31, 2005 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MCL | Yes | No | 7.225 | 5 pCi/L | - | Resolved | Dec 31, 2005 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MCL | Yes | No | 7.225 | 5 pCi/L | - | Resolved | Dec 31, 2005 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MCL | Yes | No | 7.225 | 5 pCi/L | - | Resolved | Dec 31, 2005 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MCL | Yes | No | 7.225 | 5 pCi/L | - | Resolved | Dec 31, 2005 | - | |
| Oct 1, 2005 | Dec 31, 2005 | MCL | Yes | No | 7.225 | 5 pCi/L | - | Resolved | Dec 31, 2005 | - | |
| Jul 1, 2005 | Sep 30, 2005 | MCL | Yes | No | 9.1 | 5 pCi/L | - | Resolved | Sep 30, 2005 | - | |
| Jul 1, 2005 | Sep 30, 2005 | MCL | Yes | No | 9.1 | 5 pCi/L | - | Resolved | Sep 30, 2005 | - |
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.