WONDER LAKE (NIU)
Illinois — Community Water System — PWSID: IL1115850
System Information
| PWSID | IL1115850 |
| System Name | WONDER LAKE (NIU) |
| 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 | Dec 4, 2025 |
Location & Contact
| State | Illinois |
| City | WONDER LAKE |
| ZIP Code | 60097 |
| Address | Village of Wonder Lake |
| Organization | MANGUM, JAMES |
| Phone | 815-277-9589 |
Population & Service
| Population Served | 1,950 |
| Service Connections | 780 |
Drinking Water Violations (398)
This water system has 398 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2024 | Nov 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Nov 30, 2024 | Revised Total Coliform Rule |
| Nov 1, 2024 | Nov 30, 2024 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Nov 30, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Nov 1, 2024 | Nov 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Nov 30, 2024 | Revised Total Coliform Rule |
| Nov 1, 2024 | Nov 30, 2024 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Nov 30, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Nov 1, 2024 | Nov 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Nov 30, 2024 | Revised Total Coliform Rule |
| Nov 1, 2024 | Nov 30, 2024 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Nov 30, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2013 | Sep 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2013 | Arsenic Rule |
| Jul 1, 2013 | Sep 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2013 | Arsenic Rule |
| Jul 1, 2013 | Sep 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2013 | Arsenic Rule |
| Jul 1, 2013 | Sep 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2013 | Arsenic Rule |
| Jul 1, 2013 | Sep 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2013 | Arsenic Rule |
| Jul 1, 2013 | Sep 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Sep 30, 2013 | Arsenic Rule |
| Apr 1, 2013 | Jun 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2013 | Arsenic Rule |
| Apr 1, 2013 | Jun 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2013 | Arsenic Rule |
| Apr 1, 2013 | Jun 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2013 | Arsenic Rule |
| Apr 1, 2013 | Jun 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2013 | Arsenic Rule |
| Apr 1, 2013 | Jun 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2013 | Arsenic Rule |
| Apr 1, 2013 | Jun 30, 2013 | Arsenic | MCL | Yes | No | .011 MG/L | 0.010 mg/L | .01 | Resolved | Jun 30, 2013 | Arsenic Rule |
| Oct 1, 2004 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2005 | Lead and Copper Rule |
| Oct 1, 2004 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2005 | Lead and Copper Rule |
| Oct 1, 2004 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2005 | Lead and Copper Rule |
| Oct 1, 2004 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 30, 2005 | Lead and Copper Rule |
| May 1, 2002 | May 31, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 2002 | Total Coliform Rule |
| May 1, 2002 | May 31, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 2002 | Total Coliform Rule |
| May 1, 2002 | May 31, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 2002 | Total Coliform Rule |
| Jul 1, 1998 | Jul 31, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1998 | Total Coliform Rule |
| Jul 1, 1998 | Jul 31, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jul 31, 1998 | Total Coliform Rule |
| Jun 1, 1998 | Jun 30, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 1998 | Total Coliform Rule |
| Jun 1, 1998 | Jun 30, 1998 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 1998 | Total Coliform Rule |
| Jun 1, 1998 | Jun 30, 1998 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Jun 30, 1998 | Total Coliform Rule |
| Jun 1, 1998 | Jun 30, 1998 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Jun 30, 1998 | Total Coliform Rule |
| Dec 1, 1993 | Dec 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1993 | Total Coliform Rule |
| Dec 1, 1993 | Dec 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1993 | Total Coliform Rule |
| Dec 1, 1993 | Dec 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1993 | Total Coliform Rule |
| Dec 1, 1993 | Dec 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| Nov 1, 1993 | Nov 30, 1993 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Nov 30, 1993 | Total Coliform Rule |
| May 1, 1993 | May 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 1993 | Total Coliform Rule |
| May 1, 1993 | May 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Archived | May 31, 1993 | Total Coliform Rule |
| Apr 1, 1993 | Jun 30, 1993 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jun 30, 1993 | Volatile Organic Chemicals |
| Apr 1, 1993 | Jun 30, 1993 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jun 30, 1993 | Volatile Organic Chemicals |
| Apr 1, 1993 | Jun 30, 1993 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jun 30, 1993 | Volatile Organic Chemicals |
| Apr 1, 1993 | Jun 30, 1993 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jun 30, 1993 | Volatile Organic Chemicals |
| Apr 1, 1993 | Jun 30, 1993 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Archived | Jun 30, 1993 | Volatile Organic Chemicals |
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.