LOWER PIONEER MOUNTAIN WATER SYSTEM
Montana — Community Water System — PWSID: MT0004462
System Information
| PWSID | MT0004462 |
| System Name | LOWER PIONEER MOUNTAIN WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Apr 23, 2007 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | BIG SKY |
| ZIP Code | 59716 |
| Address | PO BOX 161097 |
| Organization | MARSH, TANNER R |
| Phone | 406-577-4936 |
Population & Service
| Population Served | 350 |
| Service Connections | 210 |
Drinking Water Violations (37)
This water system has 37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 1, 2020 | Sep 30, 2020 | Revised Total Coliform Rule | MCL | Yes | No | — | — | — | Resolved | Sep 30, 2020 | Revised Total Coliform Rule |
| Sep 1, 2020 | Sep 30, 2020 | Revised Total Coliform Rule | MCL | Yes | No | — | — | — | Resolved | Sep 30, 2020 | Revised Total Coliform Rule |
| Sep 1, 2020 | Sep 30, 2020 | Revised Total Coliform Rule | MCL | Yes | No | — | — | — | Resolved | Sep 30, 2020 | Revised Total Coliform Rule |
| Jul 1, 2020 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 27, 2020 | Consumer Confidence Rule |
| Jul 1, 2020 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 27, 2020 | Consumer Confidence Rule |
| Feb 1, 2015 | Feb 28, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 28, 2015 | Total Coliform Rule |
| Feb 1, 2015 | Feb 28, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 28, 2015 | Total Coliform Rule |
| Feb 1, 2015 | Feb 28, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 28, 2015 | Total Coliform Rule |
| Feb 1, 2015 | Feb 28, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 28, 2015 | Total Coliform Rule |
| Dec 1, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 2, 2011 | Ground Water Rule |
| Dec 1, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 2, 2011 | Ground Water Rule |
| Dec 1, 2010 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 2, 2011 | Ground Water Rule |
| Feb 1, 2010 | Feb 28, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | Total Coliform Rule |
| Feb 1, 2010 | Feb 28, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | Total Coliform Rule |
| Feb 1, 2010 | Feb 28, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | Total Coliform Rule |
| Feb 1, 2010 | Feb 28, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | Total Coliform Rule |
| Oct 1, 2009 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 12, 2011 | Lead and Copper Rule |
| Oct 1, 2009 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 12, 2011 | Lead and Copper Rule |
| Oct 1, 2009 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 12, 2011 | Lead and Copper Rule |
| Oct 1, 2009 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 12, 2011 | Lead and Copper Rule |
| Mar 1, 2009 | Mar 31, 2009 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2009 | Total Coliform Rule |
| Jul 1, 2008 | Sep 30, 2008 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2008 | Radionuclides and Revised Rad Rule |
| Jul 1, 2008 | Sep 30, 2008 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2008 | Radionuclides and Revised Rad Rule |
| Jul 1, 2008 | Sep 30, 2008 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2008 | Radionuclides and Revised Rad Rule |
| Jul 1, 2008 | Sep 30, 2008 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2008 | Radionuclides and Revised Rad Rule |
| Apr 1, 2008 | Jun 30, 2008 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | Toluene | MR | No | Yes | — | 1 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | 1,1-Dichloroethylene | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | 1,1-Dichloroethylene | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | 1,1-Dichloroethylene | MR | No | Yes | — | 0.007 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | 1,2,4-Trichlorobenzene | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | 1,2,4-Trichlorobenzene | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | 1,2,4-Trichlorobenzene | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Apr 1, 2008 | Jun 30, 2008 | Styrene | MR | No | Yes | — | 0.1 mg/L | — | Resolved | Jun 30, 2008 | Volatile Organic Chemicals |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 23, 2008 | Lead and Copper Rule |
| Jan 1, 2008 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 23, 2008 | Lead and Copper 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.