OSO GENERAL STORE
Washington - Transient Non-Community - PWSID: WA5334999
System Information
| PWSID | WA5334999 |
| System Name | OSO GENERAL STORE |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Dec 30, 1986 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Mt Vernon |
| ZIP Code | 98273 |
| Address | 14263 Calhoun Rd |
| Organization | OSO GENERAL STORE |
| Phone | - |
Population & Service
| Population Served | 50 |
| Service Connections | 1 |
Drinking Water Violations (26)
This water system has 26 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 | Yes | - | - | - | Resolved | Feb 28, 2025 | - | |
| Jul 1, 2011 | Jul 31, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2011 | - | |
| Feb 1, 2011 | Feb 28, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2011 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Jan 1, 2006 | Jan 31, 2006 | MR | No | No | - | 5% of samples | - | Archived | Jan 31, 2006 | - | |
| Dec 1, 2005 | Dec 31, 2005 | MR | No | No | - | 5% of samples | - | Archived | Dec 31, 2005 | - | |
| Oct 1, 2005 | Oct 31, 2005 | MR | No | No | - | 5% of samples | - | Archived | Oct 31, 2005 | - | |
| Sep 1, 2005 | Sep 30, 2005 | MR | No | No | - | 5% of samples | - | Archived | Sep 30, 2005 | - | |
| Aug 1, 2005 | Aug 31, 2005 | MR | No | No | - | 5% of samples | - | Archived | Aug 31, 2005 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MR | No | No | - | 5% of samples | - | Archived | Jun 30, 2005 | - | |
| Apr 1, 2005 | Apr 30, 2005 | MR | No | No | - | 5% of samples | - | Archived | Apr 30, 2005 | - | |
| Sep 1, 2004 | Sep 30, 2004 | MR | No | No | - | 5% of samples | - | Archived | Sep 30, 2004 | - | |
| May 1, 2004 | May 31, 2004 | MR | No | No | - | 5% of samples | - | Archived | May 31, 2004 | - | |
| Feb 1, 2004 | Feb 29, 2004 | MR | No | No | - | 5% of samples | - | Archived | Feb 29, 2004 | - | |
| Aug 1, 2003 | Aug 31, 2003 | MR | No | No | - | 5% of samples | - | Archived | Aug 31, 2003 | - | |
| Jun 1, 2000 | Jun 30, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Jun 30, 2000 | - | |
| Apr 1, 2000 | Apr 30, 2000 | MR | No | Yes | - | 5% of samples | - | Archived | Apr 30, 2000 | - | |
| Oct 1, 1999 | Oct 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Oct 31, 1999 | - | |
| Jan 1, 1999 | Jan 31, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Jan 31, 1999 | - | |
| Nov 1, 1997 | Nov 30, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | Nov 30, 1997 | - | |
| Sep 1, 1997 | Sep 30, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | Sep 30, 1997 | - | |
| Jul 1, 1997 | Jul 31, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | Jul 31, 1997 | - | |
| Jun 1, 1997 | Jun 30, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | Jun 30, 1997 | - | |
| May 1, 1997 | May 31, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | May 31, 1997 | - | |
| Nov 1, 1992 | Nov 30, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Nov 30, 1992 | - | |
| Aug 1, 1992 | Aug 31, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 1992 | - |
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.