HARLOWTON CITY OF
Montana — Community Water System — PWSID: MT0000240
System Information
| PWSID | MT0000240 |
| System Name | HARLOWTON CITY OF |
| System Type | Community Water System |
| Water Source | Ground Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Montana |
| City | HARLOWTON |
| ZIP Code | 59036 |
| Address | PO BOX 292 |
| Organization | LEACH, ANITA |
| Phone | 406-632-5523 |
Population & Service
| Population Served | 1,050 |
| Service Connections | 573 |
Drinking Water Violations (118)
This water system has 118 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2025 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | — | |
| Jul 1, 2025 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | — | |
| Oct 1, 2024 | — | Other | No | No | — | — | — | Resolved | Oct 1, 2024 | — | |
| Oct 1, 2024 | — | Other | No | No | — | — | — | Resolved | Oct 1, 2024 | — | |
| Jul 1, 2024 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | — | |
| Jul 1, 2024 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | — | |
| Jun 1, 2024 | Jun 30, 2024 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | — | |
| Jun 1, 2024 | Jun 30, 2024 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | — | |
| Jun 1, 2024 | Jun 30, 2024 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | — | |
| Jun 1, 2024 | Jun 30, 2024 | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | — | |
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2023 | — | |
| Jul 1, 2023 | — | Other | No | No | — | — | — | Resolved | Jul 18, 2023 | — | |
| Jul 1, 2017 | — | Other | No | No | — | — | — | Resolved | Jul 24, 2017 | — | |
| Jul 1, 2017 | — | Other | No | No | — | — | — | Resolved | Jul 24, 2017 | — | |
| Jul 1, 2009 | — | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | — | |
| Jul 1, 2009 | — | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | — | |
| Jul 1, 2009 | — | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | — | |
| Jul 1, 2009 | — | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jan 1, 2009 | Dec 31, 2009 | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | — | |
| Jul 1, 2008 | Sep 30, 2008 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2008 | — | |
| Jul 1, 2008 | Sep 30, 2008 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2008 | — | |
| Jul 1, 2008 | Sep 30, 2008 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2008 | — | |
| Jul 1, 2008 | — | Other | No | No | — | — | — | Resolved | Aug 13, 2008 | — | |
| Jul 1, 2008 | — | Other | No | No | — | — | — | Resolved | Aug 13, 2008 | — | |
| Jul 1, 2008 | — | Other | No | No | — | — | — | Resolved | Aug 13, 2008 | — | |
| Apr 1, 2008 | Jun 30, 2008 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 30, 2008 | — | |
| Apr 1, 2008 | Jun 30, 2008 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 30, 2008 | — | |
| Apr 1, 2008 | Jun 30, 2008 | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 30, 2008 | — | |
| Jan 1, 2008 | Dec 31, 2010 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 2010 | — | |
| Jan 1, 2006 | — | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | — | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | — | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | — | |
| Jan 1, 2006 | — | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | — | |
| Jan 1, 2006 | Jun 30, 2006 | MR | No | No | — | TT | — | Resolved | Jun 30, 2006 | — | |
| Jan 1, 2006 | — | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | — | |
| Jul 1, 2005 | — | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | — |
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.