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 | Mar 26, 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 | - | MR | No | No | - | TT | - | Resolved | Jan 19, 2022 | - | |
| Dec 30, 2021 | - | MR | No | No | - | TT | - | Resolved | Jan 19, 2022 | - | |
| May 1, 2021 | May 31, 2021 | MON | No | Yes | - | - | - | Resolved | May 31, 2021 | - | |
| May 1, 2021 | May 31, 2021 | MON | No | Yes | - | - | - | Resolved | May 31, 2021 | - | |
| May 1, 2021 | May 31, 2021 | MON | No | Yes | - | - | - | Resolved | May 31, 2021 | - | |
| Apr 27, 2021 | - | MR | No | Yes | - | - | - | Resolved | May 17, 2021 | - | |
| Apr 27, 2021 | - | MR | No | Yes | - | - | - | Resolved | May 17, 2021 | - | |
| Apr 27, 2021 | - | MR | No | Yes | - | - | - | Resolved | May 17, 2021 | - | |
| Apr 27, 2021 | - | MR | No | Yes | - | - | - | Resolved | May 17, 2021 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Apr 1, 2015 | Apr 30, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | Apr 30, 2015 | - | |
| Aug 21, 2014 | - | MR | No | Yes | - | - | - | Resolved | Sep 30, 2014 | - | |
| Aug 21, 2014 | - | MR | No | Yes | - | - | - | Resolved | Sep 30, 2014 | - | |
| Aug 21, 2014 | - | MR | No | Yes | - | - | - | Resolved | Sep 30, 2014 | - | |
| Aug 21, 2014 | - | MR | No | Yes | - | - | - | Resolved | Sep 30, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Aug 1, 2014 | Aug 31, 2014 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 2014 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 22, 2013 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 22, 2013 | - | |
| Jul 1, 2006 | - | Other | No | No | - | - | - | Resolved | Feb 21, 2007 | - | |
| Jul 1, 2006 | - | Other | No | No | - | - | - | Resolved | Feb 21, 2007 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2005 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2005 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2005 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2005 | - | |
| Jun 1, 2005 | Jun 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jun 30, 2005 | - | |
| May 1, 1997 | May 31, 1997 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1997 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 1995 | - | |
| Dec 1, 1994 | Dec 31, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 1994 | - | |
| Nov 1, 1994 | Nov 30, 1994 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 1994 | - |
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.