Non-Permitted Tanks

The Department has not issued either an operating permit/tag or a conditional operating tag for the UST systems identified in the file below. It is a substantial violation to fill these UST systems. Remember to check for the appropriate tag before depositing fuel in any UST system. (CLICK HERE for tag descriptions)

Please contact the department at (406) 444-5300 if you believe any tank system listed here is listed in error. List may be subject to daily changes.

Non-Permitted Tank List

UST Facility Operating Permit Status

This list may be used in conjunction with the Non Permitted Tank List to determine which UST systems have a current Operating Permit and tag(s). The following tank systems are listed by county and include the status of the UST systems Operating Permit and tag(s). All regulated UST systems that have a current Operating Permit and tag may lawfully be filled. 

UST Facility Operating Permit Status List

Non-Permitted Indian Owned on Indian Land Tanks

The following tank systems are Indian-owned systems on Indian lands that the department does not regulate. Therefore, these systems are not required to have an Operating Permit and Tag and may lawfully be filled.

Non-Permitted Indian Owned/Indian Land Tank List