OSCO MUTUAL WATER SUPPLY COMPANY, INC.
Illinois - Community Water System - PWSID: IL0735200
System Information
| PWSID | IL0735200 |
| System Name | OSCO MUTUAL WATER SUPPLY COMPANY, INC. |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1981 |
| Last Reported | May 27, 2026 |
Location & Contact
| State | Illinois |
| City | OSCO |
| ZIP Code | 61274 |
| Address | 131 SOUTH ST. - BOX 236 |
| Organization | WHITE, DAVID |
| Phone | 309-945-2787 |
Population & Service
| Population Served | 80 |
| Service Connections | 50 |
Drinking Water Violations (103)
This water system has 103 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 | - | - | |
| Apr 2, 2011 | - | MR | No | No | - | TT | - | Resolved | Apr 12, 2011 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 2, 2008 | - | |
| Oct 1, 2008 | Dec 31, 2008 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 2, 2008 | - | |
| Feb 1, 2007 | Feb 28, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2007 | - | |
| Feb 1, 2007 | Feb 28, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2007 | - | |
| Feb 1, 2007 | Feb 28, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2007 | - | |
| Feb 1, 2007 | Feb 28, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 27, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 27, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 27, 2007 | - | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 27, 2007 | - | |
| Oct 8, 2005 | - | Other | No | No | - | - | - | Resolved | Oct 18, 2005 | - | |
| Oct 8, 2005 | - | Other | No | No | - | - | - | Resolved | Oct 18, 2005 | - | |
| Aug 24, 2005 | - | Other | No | No | - | - | - | Resolved | Oct 18, 2005 | - | |
| Aug 24, 2005 | - | Other | No | No | - | - | - | Resolved | Oct 18, 2005 | - | |
| Aug 24, 2005 | - | Other | No | No | - | - | - | Resolved | Oct 18, 2005 | - | |
| Aug 24, 2005 | - | Other | No | No | - | - | - | Resolved | Oct 18, 2005 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Aug 9, 2004 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Aug 9, 2004 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Aug 9, 2004 | - | |
| Jul 1, 2004 | Sep 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Aug 9, 2004 | - | |
| Apr 1, 2004 | Jun 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2004 | - | |
| Apr 1, 2004 | Jun 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2004 | - | |
| Apr 1, 2004 | Jun 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2004 | - | |
| Apr 1, 2004 | Jun 30, 2004 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 2004 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MCL | Yes | No | - | 5% of samples | - | Archived | Sep 30, 2002 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MCL | Yes | No | - | 5% of samples | - | Archived | Sep 30, 2002 | - | |
| Oct 1, 1993 | - | MR | No | No | - | TT | - | Resolved | Aug 23, 1994 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.05 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 10 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 10 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 10 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 10 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.010 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 2 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 2 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.010 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.010 mg/L | - | Archived | Nov 1, 1986 | - | |
| Nov 2, 1983 | Nov 1, 1986 | MR | No | Yes | - | 0.05 mg/L | - | Archived | Nov 1, 1986 | - |
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.