ONTARIO CITY
Ohio - Community Water System - PWSID: OH7003512
System Information
| PWSID | OH7003512 |
| System Name | ONTARIO CITY |
| 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 | Jan 30, 1981 |
| Last Reported | Feb 25, 2026 |
Location & Contact
| State | Ohio |
| City | ONTARIO |
| ZIP Code | 44906 |
| Address | 555 STUMBO RD |
| Organization | MORTON, MICHAEL |
| Phone | 567-437-5830 |
Population & Service
| Population Served | 6,756 |
| Service Connections | 2,769 |
Drinking Water Violations (69)
This water system has 69 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 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Jul 2, 2025 | - | RPT | No | No | - | - | - | Unaddressed | - | - | |
| Dec 13, 2018 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2002 | - | Other | No | No | - | - | - | Resolved | Jul 9, 2007 | - | |
| Jul 1, 2002 | - | Other | No | No | - | - | - | Resolved | Jul 9, 2007 | - | |
| Jul 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jul 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jul 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jul 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1998 | Jan 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 1998 | - | |
| Jan 1, 1998 | Jan 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 1998 | - | |
| Jan 1, 1998 | Jan 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 1998 | - | |
| Jan 1, 1998 | Jan 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 1998 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | - | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | - | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | - | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | - | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 2 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 7 MFL | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 7 MFL | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 7 MFL | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 7 MFL | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Jun 30, 1995 | - | |
| Jan 1, 1995 | Jun 30, 1995 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Jun 30, 1995 | - |
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.