Water Quality in GALLATIN GATEWAY, MT (59730)

EPA violation data for public water systems serving ZIP code 59730.

267

Total Violations

Health-Based

226

Monitoring / Reporting

233

Resolved

What does this mean?

233 of 267 violations have been resolved. 41 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 226 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 27 Population served: 2,702

Violations Detail (267 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Oct 31, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Oct 31, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Oct 31, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Sep 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Sep 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Sep 30, 2025	Active	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jul 31, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jul 31, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jul 31, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2025	Active	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Apr 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Apr 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Apr 30, 2025	Active	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 4, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Dec 4, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Dec 4, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 31, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jul 31, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jul 31, 2024	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jul 3, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jul 3, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jul 3, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jul 3, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 31, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 31, 2024	Active	N/A
Public Notice	Monitoring	N/A	N/A	Mar 31, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2023	Active	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2023	Active	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Apr 30, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Apr 30, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Apr 30, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Mar 31, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Mar 31, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Mar 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Dec 26, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Dec 26, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Dec 26, 2022	Resolved	N/A
E. COLI	Monitoring	0	N/A	Nov 15, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Nov 15, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Nov 15, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(71)

Revised Total Coliform Rule

Oct 31Resolved

Surface Water Treatment Rule

Oct 31Active

Surface Water Treatment Rule

Oct 31Active

Surface Water Treatment Rule

Oct 31Active

Revised Total Coliform Rule

Oct 31Resolved

Surface Water Treatment Rule

Sep 30Active

Surface Water Treatment Rule

Sep 30Active

Surface Water Treatment Rule

Sep 30Active

Surface Water Treatment Rule

Sep 30Resolved

Surface Water Treatment Rule

Sep 30Resolved

Surface Water Treatment Rule

Sep 30Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Surface Water Treatment Rule

Jul 31Resolved

Surface Water Treatment Rule

Jul 31Resolved

Surface Water Treatment Rule

Jul 31Resolved

Surface Water Treatment Rule

Jul 31Active

Surface Water Treatment Rule

Jul 31Active

Surface Water Treatment Rule

Jul 31Active

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Active

Surface Water Treatment Rule

Jun 30Active

Surface Water Treatment Rule

Jun 30Active

Public Notice

Jun 30Active

Public Notice

Jun 30Active

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Active

Surface Water Treatment Rule

May 31Active

Surface Water Treatment Rule

May 31Active

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Active

Surface Water Treatment Rule

Apr 30Active

Surface Water Treatment Rule

Apr 30Active

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

Revised Total Coliform Rule

Feb 28Resolved

Revised Total Coliform Rule

Feb 28Resolved

Revised Total Coliform Rule

Feb 28Resolved

Revised Total Coliform Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

2024(96)

Revised Total Coliform Rule

Dec 31Resolved

Surface Water Treatment Rule

Dec 31Resolved

Surface Water Treatment Rule

Dec 31Resolved

Surface Water Treatment Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Public Notice

Dec 4Active

Public Notice

Dec 4Active

Public Notice

Dec 4Active

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Surface Water Treatment Rule

Nov 30Resolved

Surface Water Treatment Rule

Nov 30Resolved

Surface Water Treatment Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Surface Water Treatment Rule

Oct 31Resolved

Surface Water Treatment Rule

Oct 31Resolved

Surface Water Treatment Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Surface Water Treatment Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Public Notice

Sep 30Active

Public Notice

Sep 30Active

Public Notice

Sep 30Active

Surface Water Treatment Rule

Sep 30Resolved

Surface Water Treatment Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Aug 31Resolved

Surface Water Treatment Rule

Jul 31Resolved

Surface Water Treatment Rule

Jul 31Resolved

Surface Water Treatment Rule

Jul 31Resolved

Public Notice

Jul 31Active

Public Notice

Jul 31Active

Public Notice

Jul 31Active

Revised Total Coliform Rule

Jul 3Resolved

Revised Total Coliform Rule

Jul 3Resolved

Revised Total Coliform Rule

Jul 3Resolved

Revised Total Coliform Rule

Jul 3Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Public Notice

Mar 31Active

Revised Total Coliform Rule

Mar 31Resolved

Public Notice

Mar 31Active

Public Notice

Mar 31Active

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Groundwater Rule

Mar 31Resolved

Groundwater Rule

Mar 31Resolved

Groundwater Rule

Mar 31Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Surface Water Treatment Rule

Feb 29Resolved

Surface Water Treatment Rule

Feb 29Resolved

Surface Water Treatment Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Surface Water Treatment Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

How Does This Compare?

GALLATIN GATEWAY (59730) has 267 recorded violations, including 41 health-based. 34 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Water Quality in GALLATIN GATEWAY, MT (59730)

What does this mean?

Violations Detail (267 total)

Lead & Copper Levels

Violation Timeline

2025(71)

2024(96)

2023(34)

2022(41)

2021(25)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code