FORT THOMPSON WATER SYSTEM
South Dakota — Community Water System — PWSID: 084690440
System Information
| PWSID | 084690440 |
| System Name | FORT THOMPSON WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Native American |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Mar 4, 1980 |
| Last Reported | Mar 2, 2026 |
Location & Contact
| State | South Dakota |
| City | FORT THOMPSON |
| ZIP Code | 57339 |
| Address | — |
| Organization | BIG EAGLE, DON |
| Phone | 605-245-2544 |
Population & Service
| Population Served | 1,357 |
| Service Connections | 302 |
Drinking Water Violations (224)
This water system has 224 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2024 | Jun 30, 2024 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2024 | — | |
| Apr 1, 2024 | Jun 30, 2024 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2024 | — | |
| Sep 8, 2022 | — | TT | Yes | No | — | — | — | Resolved | Mar 17, 2023 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2021 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | — | |
| Aug 1, 2013 | Aug 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2013 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Jul 1, 2012 | Sep 30, 2012 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2012 | — | |
| Apr 1, 2012 | Apr 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2012 | — | |
| Apr 1, 2012 | Jun 30, 2012 | MCL | Yes | No | .092 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2012 | — | |
| Apr 1, 2012 | Apr 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2012 | — | |
| Apr 1, 2012 | Apr 30, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2012 | — | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | No | — | 0.060 mg/L | — | Resolved | Mar 31, 2012 | — | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | No | — | 0.060 mg/L | — | Resolved | Mar 31, 2012 | — | |
| Jan 1, 2012 | Mar 31, 2012 | MCL | Yes | No | .088 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2012 | — | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | No | — | 0.080 mg/L | — | Resolved | Mar 31, 2012 | — | |
| Jan 1, 2012 | Mar 31, 2012 | MR | No | No | — | 0.080 mg/L | — | Resolved | Mar 31, 2012 | — | |
| Oct 1, 2011 | Dec 31, 2011 | MR | No | No | — | 0.080 mg/L | — | Resolved | Dec 31, 2011 | — | |
| Oct 1, 2011 | Dec 31, 2011 | MR | No | No | — | 0.060 mg/L | — | Resolved | Dec 31, 2011 | — | |
| Oct 1, 2011 | Dec 31, 2011 | MCL | Yes | No | .09 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2011 | — | |
| Oct 1, 2011 | Dec 31, 2011 | MR | No | No | — | 0.060 mg/L | — | Resolved | Dec 31, 2011 | — | |
| Oct 1, 2011 | Dec 31, 2011 | MR | No | No | — | 0.080 mg/L | — | Resolved | Dec 31, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | .093 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Jul 1, 2011 | Sep 30, 2011 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MR | No | No | — | 0.060 mg/L | — | Resolved | Jun 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 30, 2011 | — | |
| Apr 1, 2011 | Jun 30, 2011 | MR | No | No | — | 0.080 mg/L | — | Resolved | Jun 30, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2011 | — | |
| Jan 1, 2011 | Mar 31, 2011 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2011 | — | |
| Jan 1, 2011 | Dec 31, 2019 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Dec 31, 2019 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | — | MR | No | No | — | — | — | Resolved | Feb 24, 2012 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2010 | — | |
| Jan 1, 2010 | Dec 31, 2010 | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Dec 31, 2010 | — |
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.