WHITEHORSE MERCANTILE WATER SYSTEM
Washington - Transient Non-Community - PWSID: WA5364401
System Information
| PWSID | WA5364401 |
| System Name | WHITEHORSE MERCANTILE WATER SYSTEM |
| 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 | Sep 11, 1990 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Arlington |
| ZIP Code | 98223 |
| Address | 38710 State Rd 530 NW |
| Organization | WHITEHORSE MERCANTILE WATER SYSTEM |
| Phone | - |
Population & Service
| Population Served | 930 |
| Service Connections | 1 |
Drinking Water Violations (24)
This water system has 24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2025 | Nov 30, 2025 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2025 | - | |
| Aug 1, 2025 | Aug 31, 2025 | MON | No | Yes | - | - | - | Resolved | Aug 31, 2025 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Oct 1, 2012 | Oct 31, 2012 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2012 | - | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2009 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2007 | - | |
| Feb 1, 1999 | Feb 28, 1999 | MR | No | Yes | - | 5% of samples | - | Archived | Feb 28, 1999 | - | |
| Nov 1, 1997 | Nov 30, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | Nov 30, 1997 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 1997 | - | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | Yes | - | 5% of samples | - | Archived | Dec 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 1995 | - | |
| May 1, 1995 | May 31, 1995 | MR | No | Yes | - | 5% of samples | - | Archived | May 31, 1995 | - | |
| Sep 1, 1993 | Sep 30, 1993 | MR | No | Yes | - | 5% of samples | - | Archived | Sep 30, 1993 | - | |
| Aug 1, 1993 | Aug 31, 1993 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 1993 | - | |
| Aug 1, 1992 | Aug 31, 1992 | MR | No | Yes | - | 5% of samples | - | Archived | Aug 31, 1992 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
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.