DEKALB
Illinois — Community Water System — PWSID: IL0370100
System Information
| PWSID | IL0370100 |
| System Name | DEKALB |
| 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 | DEKALB |
| ZIP Code | 60115 |
| Address | 1216 MARKET STREET |
| Organization | ANDERSON, MATT |
| Phone | 815-748-2050 |
Population & Service
| Population Served | 45,000 |
| Service Connections | 11,104 |
Drinking Water Violations (106)
This water system has 106 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 21, 2025 | — | |
| Jul 1, 2025 | — | Other | No | No | — | — | — | Resolved | Nov 21, 2025 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2022 | — | |
| Jun 1, 2018 | Jun 30, 2018 | MON | No | No | — | — | — | Resolved | Jun 30, 2018 | — | |
| Jun 1, 2018 | Jun 30, 2018 | MON | No | No | — | — | — | Resolved | Jun 30, 2018 | — | |
| Jun 1, 2018 | Jun 30, 2018 | MON | No | No | — | — | — | Resolved | Jun 30, 2018 | — | |
| Jun 1, 2018 | Jun 30, 2018 | MON | No | No | — | — | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 4.0 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 4.0 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 4.0 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Apr 1, 2018 | Jun 30, 2018 | MR | No | No | — | 4.0 mg/L | — | Resolved | Jun 30, 2018 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Mar 31, 2011 | — | |
| Oct 1, 1999 | Oct 31, 1999 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 1999 | — | |
| Oct 1, 1999 | Oct 31, 1999 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 1999 | — | |
| Dec 1, 1998 | May 14, 2002 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | May 14, 2002 | — | |
| Dec 1, 1998 | May 14, 2002 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | May 14, 2002 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Jan 1, 1995 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — | |
| Dec 1, 1994 | Nov 30, 1998 | MCL | Yes | No | 9.8 | 5 pCi/L | — | Resolved | Nov 30, 1998 | — |
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.