Underground Storage Tanks 

The goal of the Montana Underground Storage Tank (UST) Leak Prevention Program is to protect human health and the environment by preventing releases of petroleum and hazardous substances from UST systems. The release of these regulated products into the environment threatens groundwater resources and can cause explosive vapors to seep into confined spaces and occupied dwellings. Just discovered a tank on your property? Review the Discovered Tanks requirements.

Please visit Permitting and Operator Assistance for owner and operator information, facility summary sheets, UST forms, permitting, and licensing information. Resources hosts a range of guidance and mapping material, technical resources for licensees, and the Laws and Regulations pertaining to Underground Storage Tanks. Can't find the data you are looking for? Use our Records Request button to submit a records request.

 Objectives

• UST systems are properly constructed and designed using recognized industry standards

• Installations, repairs and removals are conducted and inspected by qualified, trained and licensed individuals

• Active USTs are properly operated and monitored for releases

• Upon closure, USTs are properly decommissioned and sites assessed for contamination

• Maintain an updated Do Not Fill Report: it is a substantial violation to fill these UST systems.