MISTEQUA CASINO
Washington - Non-Transient Non-Community - PWSID: 105300134
System Information
| PWSID | 105300134 |
| System Name | MISTEQUA CASINO |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 27, 2006 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Washington |
| City | WELLPINIT |
| ZIP Code | 99040 |
| Address | P. O. BOX 100 |
| Organization | CHAN, LAM |
| Phone | 509-458-6588 |
Population & Service
| Population Served | 2,070 |
| Service Connections | 6 |
Drinking Water Violations (676)
This water system has 676 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 | - | - | - | Archived | Nov 30, 2025 | - | |
| Dec 13, 2024 | - | Other | No | No | - | - | - | Resolved | Sep 2, 2025 | - | |
| Oct 17, 2024 | - | TT | Yes | No | - | - | - | Resolved | Dec 3, 2024 | - | |
| Oct 17, 2024 | - | RPT | No | No | - | - | - | Resolved | Nov 20, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.010 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jun 1, 2022 | Jun 30, 2022 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2022 | - | |
| Mar 1, 2022 | - | RPT | No | No | - | - | - | Resolved | Apr 13, 2022 | - | |
| Sep 1, 2020 | Sep 30, 2020 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2020 | - | |
| Jun 1, 2019 | Jun 30, 2019 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2019 | - | |
| Jan 1, 2019 | Dec 31, 2019 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Dec 16, 2018 | - | TT | Yes | No | - | - | - | Resolved | Jul 11, 2023 | - | |
| Dec 16, 2018 | - | TT | Yes | No | - | - | - | Resolved | Aug 19, 2020 | - | |
| Dec 16, 2018 | - | TT | Yes | No | - | - | - | Resolved | Aug 19, 2020 | - | |
| Dec 16, 2018 | - | TT | Yes | No | - | - | - | Resolved | Jul 11, 2023 | - | |
| Aug 1, 2018 | Aug 31, 2018 | MON | No | Yes | - | - | - | Resolved | Aug 31, 2018 | - | |
| Feb 1, 2018 | Feb 28, 2018 | MON | No | Yes | - | - | - | Resolved | Feb 28, 2018 | - | |
| Jan 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Jun 1, 2018 | - | |
| Oct 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Sep 4, 2018 | - | |
| Jan 1, 2017 | Dec 31, 2019 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Dec 13, 2016 | - | RPT | No | No | - | - | - | Resolved | Dec 27, 2016 | - | |
| Nov 1, 2016 | Nov 30, 2016 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2016 | - | |
| Oct 11, 2016 | - | RPT | No | No | - | - | - | Resolved | Oct 21, 2016 | - | |
| Sep 1, 2016 | Sep 30, 2016 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2016 | - | |
| Sep 1, 2016 | Sep 30, 2016 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2016 | - | |
| Aug 11, 2016 | - | RPT | No | No | - | - | - | Resolved | Aug 16, 2016 | - | |
| Jul 1, 2016 | Jul 31, 2016 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2016 | - | |
| Jun 1, 2016 | Jun 30, 2016 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2016 | - | |
| Jan 1, 2016 | Dec 31, 2016 | MR | No | Yes | - | 10 mg/L | - | Resolved | Jul 28, 2016 | - | |
| Dec 1, 2015 | Dec 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Oct 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Mar 10, 2015 | - | |
| Jul 1, 2014 | Jul 31, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2014 | - | |
| Jun 1, 2014 | Jun 30, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2014 | - | |
| Jun 1, 2014 | Jun 30, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2014 | - | |
| Jun 1, 2014 | Jun 30, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2014 | - | |
| Apr 1, 2014 | Apr 30, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2014 | - | |
| Feb 1, 2014 | Feb 28, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Feb 28, 2014 | - | |
| Jan 1, 2014 | Dec 31, 2014 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2014 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Oct 1, 2013 | Oct 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2013 | Jan 31, 2013 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2013 | - | |
| Dec 1, 2012 | Dec 31, 2012 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.075 mg/L | - | Resolved | Dec 31, 2012 | - | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2012 | - |
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.