HARDIN KOA
Montana — Transient Non-Community — PWSID: MT0003941
System Information
| PWSID | MT0003941 |
| System Name | HARDIN KOA |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Non-Inventory |
| Owner Type | Private |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Aug 9, 1997 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | HARDIN |
| ZIP Code | 59034 |
| Address | RR 1 BOX 1009 |
| Organization | TRZEBIATOWSKI, DAVID |
| Phone | 406-665-1635 |
Population & Service
| Population Served | 102 |
| Service Connections | 2 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2014 | Sep 30, 2014 | Nitrate-Nitrite | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | Nitrate Rule |
| Jul 1, 2014 | Sep 30, 2014 | Nitrate-Nitrite | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | Nitrate Rule |
| Jul 1, 2014 | Sep 30, 2014 | Nitrate-Nitrite | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | Nitrate Rule |
| Jul 1, 2014 | Sep 30, 2014 | Nitrate-Nitrite | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | Nitrate Rule |
| Jul 1, 2014 | Sep 30, 2014 | Nitrate-Nitrite | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | Nitrate Rule |
| Jul 1, 2014 | Sep 30, 2014 | Nitrate-Nitrite | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | Nitrate Rule |
| Oct 1, 2013 | Dec 31, 2013 | Nitrate-Nitrite | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | Nitrate Rule |
| Oct 1, 2013 | Dec 31, 2013 | Nitrate-Nitrite | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | Nitrate Rule |
| Oct 1, 2013 | Dec 31, 2013 | Nitrate-Nitrite | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | Nitrate Rule |
| Oct 1, 2013 | Dec 31, 2013 | Nitrate-Nitrite | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | Nitrate Rule |
| Oct 1, 2013 | Dec 31, 2013 | Nitrate-Nitrite | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | Nitrate Rule |
| Apr 1, 2013 | Jun 30, 2013 | Nitrate-Nitrite | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | Nitrate Rule |
| Apr 1, 2013 | Jun 30, 2013 | Nitrate-Nitrite | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | Nitrate Rule |
| Apr 1, 2013 | Jun 30, 2013 | Nitrate-Nitrite | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | Nitrate Rule |
| Apr 1, 2013 | Jun 30, 2013 | Nitrate-Nitrite | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | Nitrate Rule |
| Apr 1, 2013 | Jun 30, 2013 | Nitrate-Nitrite | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | Nitrate Rule |
| Jul 1, 2010 | Sep 30, 2010 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | Nitrate Rule |
| Jul 1, 2010 | Sep 30, 2010 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | Nitrate Rule |
| Jul 1, 2010 | Sep 30, 2010 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | Nitrate Rule |
| Jul 1, 2007 | Sep 30, 2007 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | Total Coliform Rule |
| Jan 1, 2006 | Dec 31, 2006 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | Nitrate Rule |
| Jan 1, 2006 | Dec 31, 2006 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | Nitrate Rule |
| Jan 1, 2006 | Dec 31, 2006 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | Nitrate Rule |
| Jan 1, 2006 | Dec 31, 2006 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | Nitrate Rule |
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.