ROUND BUTTE WATER COMPANY
Montana — Community Water System — PWSID: MT0000320
System Information
| PWSID | MT0000320 |
| System Name | ROUND BUTTE WATER COMPANY |
| 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 | Feb 13, 1979 |
| Last Reported | Jan 5, 2026 |
Location & Contact
| State | Montana |
| City | RONAN |
| ZIP Code | 59864 |
| Address | 47200 BEAVER DR |
| Organization | HERREID, GERI |
| Phone | 406-883-8066 |
Population & Service
| Population Served | 400 |
| Service Connections | 160 |
Drinking Water Violations (38)
This water system has 38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 30, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 19, 2022 | Lead and Copper Rule |
| Dec 30, 2021 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 19, 2022 | Lead and Copper Rule |
| May 1, 2021 | May 31, 2021 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 31, 2021 | Revised Total Coliform Rule |
| May 1, 2021 | May 31, 2021 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 31, 2021 | Revised Total Coliform Rule |
| May 1, 2021 | May 31, 2021 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | May 31, 2021 | Revised Total Coliform Rule |
| Apr 27, 2021 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 17, 2021 | Ground Water Rule |
| Apr 27, 2021 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 17, 2021 | Ground Water Rule |
| Apr 27, 2021 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 17, 2021 | Ground Water Rule |
| Apr 27, 2021 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | May 17, 2021 | Ground Water Rule |
| Apr 1, 2015 | Apr 30, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Apr 30, 2015 | Total Coliform Rule |
| Apr 1, 2015 | Apr 30, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Apr 30, 2015 | Total Coliform Rule |
| Apr 1, 2015 | Apr 30, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Apr 30, 2015 | Total Coliform Rule |
| Apr 1, 2015 | Apr 30, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Apr 30, 2015 | Total Coliform Rule |
| Apr 1, 2015 | Apr 30, 2015 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Apr 30, 2015 | Total Coliform Rule |
| Aug 21, 2014 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Sep 30, 2014 | Ground Water Rule |
| Aug 21, 2014 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Sep 30, 2014 | Ground Water Rule |
| Aug 21, 2014 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Sep 30, 2014 | Ground Water Rule |
| Aug 21, 2014 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Sep 30, 2014 | Ground Water Rule |
| Aug 1, 2014 | Aug 31, 2014 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2014 | Total Coliform Rule |
| Aug 1, 2014 | Aug 31, 2014 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2014 | Total Coliform Rule |
| Aug 1, 2014 | Aug 31, 2014 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2014 | Total Coliform Rule |
| Aug 1, 2014 | Aug 31, 2014 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2014 | Total Coliform Rule |
| Aug 1, 2014 | Aug 31, 2014 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2014 | Total Coliform Rule |
| Jul 1, 2013 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 22, 2013 | Consumer Confidence Rule |
| Jul 1, 2013 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 22, 2013 | Consumer Confidence Rule |
| Jul 1, 2006 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Feb 21, 2007 | Consumer Confidence Rule |
| Jul 1, 2006 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Feb 21, 2007 | Consumer Confidence Rule |
| Jun 1, 2005 | Jun 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2005 | Total Coliform Rule |
| Jun 1, 2005 | Jun 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2005 | Total Coliform Rule |
| Jun 1, 2005 | Jun 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2005 | Total Coliform Rule |
| Jun 1, 2005 | Jun 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2005 | Total Coliform Rule |
| Jun 1, 2005 | Jun 30, 2005 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2005 | Total Coliform Rule |
| May 1, 1997 | May 31, 1997 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 1997 | Total Coliform Rule |
| Aug 1, 1995 | Aug 31, 1995 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 1995 | Total Coliform Rule |
| Aug 1, 1995 | Aug 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 1995 | Total Coliform Rule |
| Aug 1, 1995 | Aug 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 1995 | Total Coliform Rule |
| Dec 1, 1994 | Dec 31, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 1994 | Total Coliform Rule |
| Nov 1, 1994 | Nov 30, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1994 | Total Coliform 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.