CORNELIUS, CITY OF
Oregon - Community Water System - PWSID: OR4100218
System Information
| PWSID | OR4100218 |
| System Name | CORNELIUS, CITY OF |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| 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 | CORNELIUS |
| ZIP Code | 97113-8912 |
| Address | 1355 N BARLOW ST |
| Organization | CORNELIUS, CITY OF |
| Phone | 503-702-6046 |
Population & Service
| Population Served | 14,490 |
| Service Connections | 4,153 |
Drinking Water Violations (42)
This water system has 42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2024 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 20, 2023 | - | |
| Jul 1, 2022 | Sep 30, 2022 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Sep 30, 2022 | - | |
| Jul 1, 2022 | Sep 30, 2022 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Sep 30, 2022 | - | |
| Jul 1, 2022 | Sep 30, 2022 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2022 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | - | 30 ug/L | - | Resolved | Jun 30, 2020 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Jun 30, 2020 | - | |
| Apr 1, 2020 | Jun 30, 2020 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2020 | - | |
| May 1, 2018 | May 31, 2018 | MON | No | No | - | - | - | Resolved | May 31, 2018 | - | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2014 | - | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2014 | - | |
| May 1, 2013 | May 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 2013 | - | |
| Sep 1, 2012 | Sep 30, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2012 | - | |
| Sep 1, 2012 | Sep 30, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2012 | - | |
| Feb 1, 2009 | Feb 28, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2009 | - | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Sep 30, 2007 | - | |
| Jul 1, 2007 | Jul 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2007 | - | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2007 | - | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Jun 30, 2007 | - | |
| Oct 1, 2006 | Oct 31, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2006 | - | |
| Sep 1, 2006 | Sep 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2006 | - | |
| Jan 1, 2005 | - | MR | No | No | - | TT | - | Resolved | Sep 22, 2005 | - | |
| Oct 19, 2004 | - | Other | No | No | - | - | - | Resolved | Dec 2, 2004 | - | |
| Jul 1, 2004 | - | Other | No | No | - | - | - | Resolved | Dec 2, 2004 | - | |
| Oct 19, 2003 | - | Other | No | No | - | - | - | Resolved | Mar 2, 2004 | - | |
| Jul 1, 2003 | - | Other | No | No | - | - | - | Resolved | Mar 2, 2004 | - | |
| Jun 1, 2002 | Jun 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2002 | - | |
| Nov 1, 2001 | Nov 30, 2001 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2001 | - | |
| Oct 1, 2000 | - | Other | No | No | - | - | - | Resolved | Aug 15, 2001 | - | |
| Jul 1, 2000 | - | Other | No | No | - | - | - | Resolved | Aug 15, 2001 | - | |
| Jan 1, 1999 | Jan 31, 1999 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 1999 | - | |
| May 1, 1998 | May 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1998 | - | |
| Sep 1, 1996 | Sep 30, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 1996 | - | |
| Mar 1, 1996 | Mar 31, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 1996 | - | |
| Mar 1, 1996 | Mar 31, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 1996 | - | |
| Mar 1, 1996 | Mar 31, 1996 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 1996 | - | |
| Nov 1, 1992 | Nov 30, 1992 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1992 | - | |
| Jul 1, 1992 | Jan 31, 1993 | MR | No | No | - | TT | - | Resolved | Jan 31, 1993 | - | |
| May 1, 1991 | May 31, 1991 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1991 | - |
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.