HERMISTON, CITY OF
Oregon — Community Water System — PWSID: OR4100372
System Information
| PWSID | OR4100372 |
| System Name | HERMISTON, 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 | HERMISTON |
| ZIP Code | 97838 |
| Address | 180 NE 2ND ST |
| Organization | HERMISTON, CITY OF |
| Phone | 541-567-5521 |
Population & Service
| Population Served | 20,000 |
| Service Connections | 5,979 |
Drinking Water Violations (168)
This water system has 168 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 1, 2025 | Feb 28, 2025 | MON | No | No | — | — | — | Resolved | Feb 28, 2025 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | — | 10 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Sep 1, 2022 | Sep 30, 2022 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2022 | — | |
| Sep 1, 2022 | Sep 30, 2022 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2022 | — | |
| Jul 1, 2022 | Jul 31, 2022 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2022 | — | |
| Jul 1, 2022 | Jul 31, 2022 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2022 | — | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2016 | — | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2016 | — | |
| Apr 1, 2015 | Jun 30, 2015 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2015 | — | |
| Apr 1, 2015 | Jun 30, 2015 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2015 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2014 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2013 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2012 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Oct 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Sep 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Sep 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Sep 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Sep 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2010 | — | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2010 | — | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | Yes | — | — | — | Resolved | Jul 31, 2010 | — | |
| Jul 1, 2010 | Jul 31, 2010 | MR | No | Yes | — | — | — | Resolved | Jul 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 | — | 0.060 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, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.6 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.1 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 | — | 0.2 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 0.005 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2009 | — |
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.