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 | Mar 26, 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 (40)
This water system has 40 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 | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | 10.4 MG/L | — | — | Resolved | Sep 30, 2014 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | 12.5 MG/L | — | 10 | Resolved | Dec 31, 2013 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | — | |
| Apr 1, 2013 | Jun 30, 2013 | MCL | Yes | No | 10.7 MG/L | — | 10 | Resolved | Jun 30, 2013 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2010 | Sep 30, 2010 | MR | No | Yes | — | — | — | Resolved | Sep 30, 2010 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2007 | — | |
| May 1, 2007 | May 31, 2007 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2007 | — | |
| May 1, 2007 | May 31, 2007 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2007 | — | |
| May 1, 2007 | May 31, 2007 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2007 | — | |
| May 1, 2007 | May 31, 2007 | MCL | Yes | No | — | 5% of samples | — | Resolved | May 31, 2007 | — | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2007 | — | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | — | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | — | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | — | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | — | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | — | |
| Jan 1, 2006 | Dec 31, 2006 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2006 | — | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2005 | — | |
| Jan 1, 2005 | Dec 31, 2005 | MR | No | Yes | — | — | — | 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.