HALFWAY HOUSE
Montana — Transient Non-Community — PWSID: MT0003188
System Information
| PWSID | MT0003188 |
| System Name | HALFWAY HOUSE |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jul 1, 1987 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | TROY |
| ZIP Code | 59935 |
| Address | 19824 BULL LAKE RD |
| Organization | SEAMANS, TAMMY |
| Phone | 406-295-4358 |
Population & Service
| Population Served | 86 |
| Service Connections | 1 |
Drinking Water Violations (25)
This water system has 25 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, 2025 | Jun 30, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Archived | Jun 30, 2025 | Revised Total Coliform Rule |
| Apr 1, 2025 | Jun 30, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Archived | Jun 30, 2025 | Revised Total Coliform Rule |
| Jan 1, 2024 | Dec 31, 2024 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2024 | Nitrate Rule |
| Jan 1, 2024 | Dec 31, 2024 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2024 | Nitrate Rule |
| Jan 1, 2024 | Dec 31, 2024 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2024 | Nitrate Rule |
| Jan 1, 2024 | Dec 31, 2024 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2024 | Nitrate Rule |
| Jan 1, 2020 | Dec 31, 2020 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2020 | Nitrate Rule |
| Jan 1, 2020 | Dec 31, 2020 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2020 | Nitrate Rule |
| Jan 1, 2020 | Dec 31, 2020 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2020 | Nitrate Rule |
| Jul 1, 2014 | Sep 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | Total Coliform Rule |
| Jul 1, 2014 | Sep 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | Total Coliform Rule |
| Jul 1, 2014 | Sep 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2014 | Total Coliform Rule |
| Apr 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Apr 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Apr 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jan 1, 2004 | Mar 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2004 | Total Coliform Rule |
| Jan 1, 2004 | Mar 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2004 | Total Coliform Rule |
| Jan 1, 2004 | Mar 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2004 | Total Coliform Rule |
| Jan 1, 2004 | Mar 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2004 | Total Coliform Rule |
| Jan 1, 2004 | Mar 31, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2004 | Total Coliform Rule |
| Jul 1, 1994 | Jul 31, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | Total Coliform Rule |
| Jul 1, 1994 | Jul 31, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | Total Coliform Rule |
| Feb 1, 1994 | Feb 28, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 1994 | Total Coliform Rule |
| Feb 1, 1994 | Feb 28, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 1994 | Total Coliform Rule |
| Jan 1, 1993 | Dec 31, 1993 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1993 | 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.