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 | Jan 5, 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 (111)
This water system has 111 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 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | Consumer Confidence Rule |
| Jul 1, 2025 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | Consumer Confidence Rule |
| Oct 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 1, 2024 | Consumer Confidence Rule |
| Oct 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Oct 1, 2024 | Consumer Confidence Rule |
| Jul 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | Consumer Confidence Rule |
| Jul 1, 2024 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 18, 2025 | Consumer Confidence Rule |
| Jun 1, 2024 | Jun 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | Revised Total Coliform Rule |
| Jun 1, 2024 | Jun 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | Revised Total Coliform Rule |
| Jun 1, 2024 | Jun 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | Revised Total Coliform Rule |
| Jun 1, 2024 | Jun 30, 2024 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2024 | Revised Total Coliform Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 18, 2023 | Consumer Confidence Rule |
| Jul 1, 2023 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 18, 2023 | Consumer Confidence Rule |
| Jul 1, 2017 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 24, 2017 | Consumer Confidence Rule |
| Jul 1, 2017 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 24, 2017 | Consumer Confidence Rule |
| Jul 1, 2009 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | Consumer Confidence Rule |
| Jul 1, 2009 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | Consumer Confidence Rule |
| Jul 1, 2009 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | Consumer Confidence Rule |
| Jul 1, 2009 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Dec 28, 2009 | Consumer Confidence Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jan 1, 2009 | Dec 31, 2009 | Nitrate-Nitrite | MR | No | Yes | — | — | — | Resolved | Dec 31, 2009 | Nitrate Rule |
| Jul 1, 2008 | Sep 30, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2008 | Arsenic Rule |
| Jul 1, 2008 | Sep 30, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2008 | Arsenic Rule |
| Jul 1, 2008 | Sep 30, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Sep 30, 2008 | Arsenic Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 13, 2008 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 13, 2008 | Consumer Confidence Rule |
| Jul 1, 2008 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Aug 13, 2008 | Consumer Confidence Rule |
| Apr 1, 2008 | Jun 30, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 30, 2008 | Arsenic Rule |
| Apr 1, 2008 | Jun 30, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 30, 2008 | Arsenic Rule |
| Apr 1, 2008 | Jun 30, 2008 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Resolved | Jun 30, 2008 | Arsenic Rule |
| Jan 1, 2008 | Dec 31, 2010 | Arsenic | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 2010 | Arsenic Rule |
| Jan 1, 2006 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | 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 |
| 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 |
| 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 |
| Jan 1, 2006 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | Lead and Copper Rule |
| Jan 1, 2006 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | Lead and Copper Rule |
| Jan 1, 2006 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | Lead and Copper Rule |
| Jan 1, 2006 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | 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 |
| Jul 1, 2005 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 4, 2007 | 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.