ONTARIO, CITY OF
Oregon — Community Water System — PWSID: OR4100587
System Information
| PWSID | OR4100587 |
| System Name | ONTARIO, CITY OF |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 12, 1979 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Oregon |
| City | ONTARIO |
| ZIP Code | 97914 |
| Address | 1900 SE 5TH AVE |
| Organization | ONTARIO, CITY OF |
| Phone | 541-889-8011 |
Population & Service
| Population Served | 14,465 |
| Service Connections | 4,082 |
Drinking Water Violations (150)
This water system has 150 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Mar 1, 2023 | Mar 31, 2023 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2023 | — | |
| Jan 1, 2023 | Jan 31, 2023 | MON | No | No | — | — | — | Resolved | Jan 31, 2023 | — | |
| Jul 1, 2015 | Sep 30, 2015 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2015 | — | |
| Jul 1, 2015 | Sep 30, 2015 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2015 | — | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2014 | — | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2014 | — | |
| Aug 1, 2014 | Aug 31, 2014 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2014 | — | |
| Jul 1, 2013 | Jul 31, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2013 | — | |
| Jan 1, 2012 | Jan 31, 2012 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2012 | — | |
| Jan 1, 2012 | Jan 31, 2012 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2012 | — | |
| Jan 1, 2012 | Jan 31, 2012 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2012 | — | |
| Jan 1, 2012 | Jan 31, 2012 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2012 | — | |
| Jan 1, 2012 | Jan 31, 2012 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2012 | — | |
| Jan 1, 2012 | Jan 31, 2012 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2012 | — | |
| Nov 1, 2011 | Nov 30, 2011 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2011 | — | |
| Nov 1, 2011 | Nov 30, 2011 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2011 | — | |
| Nov 1, 2011 | Nov 30, 2011 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2011 | — | |
| Nov 1, 2011 | Nov 30, 2011 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2011 | — | |
| Nov 1, 2011 | Nov 30, 2011 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2011 | — | |
| Nov 1, 2011 | Nov 30, 2011 | MR | No | Yes | — | — | — | Resolved | Nov 30, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2011 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2010 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2010 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2010 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2010 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2010 | — | |
| Mar 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2010 | Mar 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2010 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.001 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0005 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.0002 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2008 | Dec 31, 2008 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.00005 mg/L | — | Resolved | Dec 31, 2010 | — |
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.