MOUNT PLEASANT ESTATES
Montana - Community Water System - PWSID: MT0000644
System Information
| PWSID | MT0000644 |
| System Name | MOUNT PLEASANT ESTATES |
| 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 | Mar 5, 1980 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | SIDNEY |
| ZIP Code | 59270 |
| Address | PO BOX 1049 |
| Organization | ZELINSKY, ANDREA |
| Phone | 406-433-5464 |
Population & Service
| Population Served | 45 |
| Service Connections | 15 |
Drinking Water Violations (474)
This water system has 474 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, 2024 | - | MR | No | No | - | TT | - | Resolved | Feb 4, 2025 | - | |
| Dec 30, 2024 | - | MR | No | No | - | TT | - | Resolved | Feb 4, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Nov 7, 2024 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Nov 7, 2024 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Nov 7, 2024 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Sep 2, 2021 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Sep 2, 2021 | - | |
| Jul 1, 2020 | - | Other | No | No | - | - | - | Resolved | Sep 15, 2020 | - | |
| Jul 1, 2020 | - | Other | No | No | - | - | - | Resolved | Sep 15, 2020 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 17, 2018 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 17, 2018 | - | |
| Oct 1, 2018 | - | MR | No | No | - | TT | - | Resolved | Oct 17, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 14, 2018 | - | |
| Jul 1, 2018 | - | Other | No | No | - | - | - | Resolved | Aug 14, 2018 | - | |
| Dec 30, 2015 | - | MR | No | No | - | TT | - | Resolved | Dec 17, 2021 | - | |
| Dec 30, 2015 | - | MR | No | No | - | TT | - | Resolved | Dec 17, 2021 | - | |
| Oct 1, 2015 | - | Other | No | No | - | - | - | Resolved | Nov 5, 2015 | - | |
| Oct 1, 2015 | - | Other | No | No | - | - | - | Resolved | Nov 5, 2015 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Nov 5, 2015 | - | |
| Jul 1, 2015 | - | Other | No | No | - | - | - | Resolved | Nov 5, 2015 | - | |
| Jun 5, 2015 | - | MR | No | Yes | - | - | - | Resolved | Jun 10, 2015 | - | |
| Jun 5, 2015 | - | MR | No | Yes | - | - | - | Resolved | Jun 10, 2015 | - | |
| Jun 5, 2015 | - | MR | No | Yes | - | - | - | Resolved | Jun 10, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| May 1, 2015 | May 31, 2015 | MCL | Yes | No | - | 5% of samples | - | Resolved | May 31, 2015 | - | |
| Oct 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Oct 23, 2014 | - | |
| Oct 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Oct 23, 2014 | - | |
| Oct 1, 2014 | - | MR | No | No | - | TT | - | Resolved | Oct 23, 2014 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2013 | - | |
| Jul 1, 2013 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2013 | - | |
| Jan 1, 2012 | - | MR | No | No | - | TT | - | Resolved | Dec 17, 2021 | - | |
| Jan 1, 2012 | - | MR | No | No | - | TT | - | Resolved | Dec 17, 2021 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.1 mg/L | - | Resolved | Oct 31, 2013 | - | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Oct 31, 2013 | - |
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.