DARBY TOWN OF
Montana — Community Water System — PWSID: MT0000195
System Information
| PWSID | MT0000195 |
| System Name | DARBY TOWN OF |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | DARBY |
| ZIP Code | 59829 |
| Address | PO BOX 37 |
| Organization | MCKINNEY, NANCY |
| Phone | 406-821-3753 |
Population & Service
| Population Served | 850 |
| Service Connections | 494 |
Drinking Water Violations (637)
This water system has 637 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 6, 2024 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Aug 6, 2024 | — | Lead and Copper Rule | TT | Yes | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| May 1, 2023 | May 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 22, 2023 | Revised Total Coliform Rule |
| May 1, 2023 | May 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 22, 2023 | Revised Total Coliform Rule |
| May 1, 2023 | May 31, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 22, 2023 | Revised Total Coliform Rule |
| Jul 1, 2021 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 26, 2021 | Consumer Confidence Rule |
| Jul 1, 2021 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 26, 2021 | Consumer Confidence Rule |
| Jul 1, 2017 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 27, 2017 | Consumer Confidence Rule |
| Jul 1, 2017 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 27, 2017 | Consumer Confidence Rule |
| Jul 1, 2010 | Sep 30, 2010 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2010 | Radionuclides and Revised Rad Rule |
| Jul 1, 2010 | Sep 30, 2010 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Sep 30, 2010 | Radionuclides and Revised Rad Rule |
| Jul 1, 2010 | Sep 30, 2010 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2010 | Radionuclides and Revised Rad Rule |
| Jul 1, 2010 | Sep 30, 2010 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Sep 30, 2010 | Radionuclides and Revised Rad Rule |
| Jul 1, 2010 | Sep 30, 2010 | Gross Alpha, Excl. Radon and U | MR | No | Yes | — | 15 pCi/L | — | Resolved | Sep 30, 2010 | Radionuclides and Revised Rad Rule |
| Jul 1, 2010 | Sep 30, 2010 | Combined Radium (-226 and -228) | MR | No | Yes | — | 5 pCi/L | — | Resolved | Sep 30, 2010 | Radionuclides and Revised Rad Rule |
| Jul 1, 2006 | Dec 31, 2006 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2006 | Lead and Copper Rule |
| Jul 1, 2006 | Dec 31, 2006 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Dec 31, 2006 | Lead and Copper Rule |
| Jan 1, 2006 | Jun 30, 2006 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | Lead and Copper Rule |
| Jan 1, 2006 | Jun 30, 2006 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Oct 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Feb 9, 2007 | Lead and Copper Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Sep 1, 2005 | Sep 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2005 | Total Coliform Rule |
| Aug 1, 2005 | Aug 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2005 | Total Coliform Rule |
| Aug 1, 2005 | Aug 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2005 | Total Coliform Rule |
| Aug 1, 2005 | Aug 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2005 | Total Coliform Rule |
| Aug 1, 2005 | Aug 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2005 | Total Coliform Rule |
| Aug 1, 2005 | Aug 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2005 | Total Coliform Rule |
| Aug 1, 2005 | Aug 31, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2005 | Total Coliform Rule |
| Jan 1, 2005 | Jun 30, 2005 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 30, 2005 | Lead and Copper Rule |
| Jan 1, 2005 | Jun 30, 2005 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jun 30, 2005 | 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.