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Clean Water Act discharge permit · NPDES MTPU00118

CALUMET MONTANA REFINING LLC, Great Falls, MT: NPDES MTPU00118 discharge permit, effluent exceedances, inspections, penalties

CALUMET MONTANA REFINING LLC, held by Calumet Montana Refining, holds NPDES permit MTPU00118. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for CALUMET MONTANA REFINING LLC: its NPDES ID, its permit type and status, its its address in Great Falls, Montana. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTPU00118.

Identity

Facility as filedCALUMET MONTANA REFINING LLC
Permittee as filedCalumet Montana Refining
NPDES IDMTPU00118
Permit statusPending
Permit typeIndividual industrial user permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
AddressGreat Falls, MT 59401
Receiving water impaired303(D) Listed
Other EPA IDs (FRS)RCRA handler MTD000475194; ICIS-AIR source MT0000003001300004

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTPU00118.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MTPU00118.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTPU00118.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MTPU00118 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

The CALUMET MONTANA REFINING LLC permit, NPDES ID MTPU00118 in Great Falls, Cascade County, Montana, is one of 6 individual industrial user permits in Cascade County on the register, and it is currently pending. Among those 6 permits, 0.0% have a violation on file, and this permit has no pollutants under a numeric limit and no pollutants with an effluent exceedance.