ONARGA
Illinois — Community Water System — PWSID: IL0750700
System Information
| PWSID | IL0750700 |
| System Name | ONARGA |
| 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 | ONARGA |
| ZIP Code | 60955 |
| Address | VILLAGE OF ONARGA |
| Organization | HAMILTON, TIM |
| Phone | 815-268-7311 |
Population & Service
| Population Served | 1,409 |
| Service Connections | 500 |
Drinking Water Violations (21)
This water system has 21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 16, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | Dec 3, 2024 | Public Notice Rule and Revised PN Rule |
| Oct 16, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | Dec 3, 2024 | Public Notice Rule and Revised PN Rule |
| Oct 16, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | Dec 3, 2024 | Public Notice Rule and Revised PN Rule |
| Oct 16, 2024 | — | Public Notice | Other | No | No | — | — | — | Resolved | Dec 3, 2024 | Public Notice Rule and Revised PN Rule |
| Aug 1, 2023 | Aug 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | Revised Total Coliform Rule |
| Aug 1, 2023 | Aug 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | Revised Total Coliform Rule |
| Aug 1, 2023 | Aug 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | Revised Total Coliform Rule |
| Aug 1, 2023 | Aug 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | Revised Total Coliform Rule |
| Jul 1, 2023 | Sep 30, 2023 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 25, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 25, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 25, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 25, 2023 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 15, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 15, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 15, 2022 | Lead and Copper Rule |
| Jul 1, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 15, 2022 | Lead and Copper Rule |
| Jul 1, 2020 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 17, 2020 | Consumer Confidence Rule |
| Jul 1, 2020 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 17, 2020 | Consumer Confidence Rule |
| Oct 1, 2000 | Dec 31, 2000 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2000 | Lead and Copper Rule |
| Jan 1, 1994 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Resolved | Jan 25, 1995 | Lead and Copper Rule |
| Jun 30, 1977 | Jun 29, 1981 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Jun 29, 1981 | Radionuclides and Revised Rad Rule |
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.