POTOMAC
Illinois - Community Water System - PWSID: IL1830650
System Information
| PWSID | IL1830650 |
| System Name | POTOMAC |
| 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 | POTOMAC |
| ZIP Code | 61865 |
| Address | 310 W STATE STREET |
| Organization | CESSNA, SHELLY |
| Phone | 217-987-6900 |
Population & Service
| Population Served | 685 |
| Service Connections | 299 |
Drinking Water Violations (53)
This water system has 53 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 1, 2025 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Oct 1, 2025 | - | MR | No | No | - | TT | - | Unaddressed | - | - | |
| Aug 22, 2025 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jul 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Jul 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Jul 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 22, 2023 | - | |
| Jul 1, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 22, 2023 | - | |
| Apr 14, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 13, 2022 | - | |
| Apr 14, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 13, 2022 | - | |
| Apr 14, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 13, 2022 | - | |
| Apr 14, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 13, 2022 | - | |
| Apr 14, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 13, 2022 | - | |
| Apr 14, 2022 | - | Other | No | No | - | - | - | Resolved | Jun 13, 2022 | - | |
| Oct 22, 2021 | - | Other | No | No | - | - | - | Resolved | Jul 16, 2025 | - | |
| Oct 22, 2021 | - | Other | No | No | - | - | - | Resolved | Jul 16, 2025 | - | |
| Jul 1, 2021 | Sep 30, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2021 | - | |
| Jul 1, 2021 | Sep 30, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2021 | - | |
| Jul 1, 2021 | Sep 30, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2021 | - | |
| Jul 1, 2021 | Sep 30, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2021 | - | |
| Mar 1, 2021 | Mar 31, 2021 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2021 | - | |
| Mar 1, 2021 | Mar 31, 2021 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2021 | - | |
| Mar 1, 2021 | Mar 31, 2021 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2021 | - | |
| Mar 1, 2021 | Mar 31, 2021 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2021 | - | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2021 | - | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2021 | - | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2021 | - | |
| Jan 1, 2021 | Mar 31, 2021 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Mar 31, 2021 | - | |
| Dec 30, 2019 | - | MR | No | No | - | TT | - | Resolved | Mar 4, 2020 | - | |
| Dec 30, 2019 | - | MR | No | No | - | TT | - | Resolved | Mar 4, 2020 | - | |
| Sep 1, 2019 | Aug 31, 2020 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Aug 31, 2020 | - | |
| Sep 1, 2019 | Aug 31, 2020 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Aug 31, 2020 | - | |
| Sep 1, 2019 | Aug 31, 2020 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Aug 31, 2020 | - | |
| Sep 1, 2019 | Aug 31, 2020 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Aug 31, 2020 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 24, 2019 | - | |
| Jul 1, 2019 | Sep 30, 2019 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 24, 2019 | - | |
| Jul 1, 2003 | - | Other | No | No | - | - | - | Resolved | Jul 31, 2003 | - | |
| Jul 1, 2003 | - | Other | No | No | - | - | - | Resolved | Jul 31, 2003 | - | |
| 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 | - | |
| Jul 1, 1994 | - | MR | No | No | - | TT | - | Resolved | Dec 31, 1994 | - | |
| Jan 1, 1991 | Jan 31, 1991 | MR | No | No | - | 5% of samples | - | Archived | Jan 31, 1991 | - | |
| Jan 1, 1991 | Jan 31, 1991 | MR | No | No | - | 5% of samples | - | Archived | Jan 31, 1991 | - | |
| Jan 1, 1991 | Jan 31, 1991 | MR | No | No | - | 5% of samples | - | Archived | Jan 31, 1991 | - | |
| Jun 30, 1977 | Jun 29, 1981 | MR | No | No | - | 15 pCi/L | - | Archived | Jun 29, 1981 | - | |
| - | - | - | 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.