PIONEER WATER COMPANY
Washington — Community Water System — PWSID: WA5324885
System Information
| PWSID | WA5324885 |
| System Name | PIONEER WATER COMPANY |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Aug 30, 1993 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Marshall |
| ZIP Code | 99020 |
| Address | PO Box 66 |
| Organization | PIONEER WATER COMPANY |
| Phone | — |
Population & Service
| Population Served | 443 |
| Service Connections | 165 |
Drinking Water Violations (66)
This water system has 66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2024 | — | Other | No | No | — | — | — | Resolved | Feb 26, 2025 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2024 | — | |
| Jul 1, 2021 | — | Other | No | No | — | — | — | Resolved | Oct 4, 2021 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.075 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.7 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.07 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.007 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.2 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.6 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.07 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Jan 1, 2020 | Dec 31, 2025 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2025 | — | |
| Sep 1, 2019 | Sep 30, 2019 | MON | No | Yes | — | — | — | Resolved | Sep 30, 2019 | — | |
| Jan 1, 2016 | Dec 31, 2016 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2016 | — | |
| Jan 1, 2016 | Dec 31, 2016 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2016 | — | |
| Jul 1, 2015 | — | Other | No | No | — | — | — | Resolved | Sep 28, 2015 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Oct 20, 2014 | — | |
| Jul 1, 2013 | — | Other | No | No | — | — | — | Resolved | Sep 3, 2013 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.004 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.05 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 2 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | — | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.1 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.2 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.002 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2007 | MR | No | Yes | — | 0.006 mg/L | — | Archived | Dec 31, 2007 | — | |
| Jan 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Dec 31, 2005 | — |
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.