LITTLE SWAN LAKE SD
Illinois - Community Water System - PWSID: IL1875050
System Information
| PWSID | IL1875050 |
| System Name | LITTLE SWAN LAKE SD |
| 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 | MONMOUTH |
| ZIP Code | 61462 |
| Address | 122 South 11th street |
| Organization | NELSON, RICHARD |
| Phone | 309-333-3762 |
Population & Service
| Population Served | 438 |
| Service Connections | 175 |
Drinking Water Violations (57)
This water system has 57 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 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Jul 1, 2025 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Dec 30, 2022 | - | MR | No | No | - | TT | - | Resolved | Jan 25, 2023 | - | |
| Dec 30, 2022 | - | MR | No | No | - | TT | - | Resolved | Jan 25, 2023 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2011 | - | |
| Jul 1, 2011 | - | Other | No | No | - | - | - | Resolved | Aug 3, 2011 | - | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 4, 2007 | - | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 4, 2007 | - | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | May 21, 2007 | - | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | May 21, 2007 | - | |
| Apr 1, 1998 | Apr 30, 1998 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 1998 | - | |
| Apr 1, 1998 | Apr 30, 1998 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 1998 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1997 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1997 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1997 | - | |
| Jan 1, 1997 | Jan 31, 1997 | MR | No | No | - | 5% of samples | - | Archived | Jan 31, 1997 | - | |
| Aug 1, 1996 | Aug 31, 1996 | MR | No | No | - | 5% of samples | - | Archived | Aug 31, 1996 | - | |
| Aug 1, 1996 | Aug 31, 1996 | MR | No | No | - | 5% of samples | - | Archived | Aug 31, 1996 | - | |
| Aug 1, 1996 | Aug 31, 1996 | MR | No | No | - | 5% of samples | - | Archived | Aug 31, 1996 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1995 | - | |
| Apr 1, 1995 | Apr 30, 1995 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 1995 | - | |
| Apr 1, 1995 | Apr 30, 1995 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 1995 | - | |
| Apr 1, 1995 | Apr 30, 1995 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 1995 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1994 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1994 | - | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | - | 5% of samples | - | Archived | Jul 31, 1994 | - | |
| May 1, 1992 | May 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | May 31, 1992 | - | |
| May 1, 1992 | May 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | May 31, 1992 | - | |
| May 1, 1992 | May 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | May 31, 1992 | - | |
| May 1, 1992 | May 31, 1992 | MR | No | No | - | 5% of samples | - | Archived | May 31, 1992 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1984 | May 31, 1987 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Resolved | Nov 14, 1985 | - | |
| Jun 1, 1981 | May 31, 1984 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Archived | May 31, 1984 | - | |
| Jun 1, 1981 | May 31, 1984 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Archived | May 31, 1984 | - | |
| Jun 1, 1981 | May 31, 1984 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Archived | May 31, 1984 | - | |
| Jun 1, 1981 | May 31, 1984 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Archived | May 31, 1984 | - | |
| Jun 1, 1981 | May 31, 1984 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Archived | May 31, 1984 | - | |
| Jun 1, 1981 | May 31, 1984 | MCL | Yes | No | 2.7 | 4.0 mg/L | - | Archived | May 31, 1984 | - | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | - | 15 pCi/L | - | Archived | Jun 29, 1981 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | 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.