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Clean Water Act discharge permit · NPDES MTR000837

MT MARION, Columbus, MT: NPDES MTR000837 discharge permit, effluent exceedances, inspections, penalties

MT MARION, held by Mt. Marian Enterprises, holds NPDES permit MTR000837, which discharges to Yellowstone River. EPA’s file records it issued August 17, 2023 and expiring January 31, 2028. 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.

Identity

Facility as filedMT MARION
Permittee as filedMt. Marian Enterprises
NPDES IDMTR000837
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramIndustrial stormwater
IssuedAugust 17, 2023
Expiration dateJanuary 31, 2028
AddressColumbus, MT 59019
Receiving waterYELLOWSTONE RIVER
SubwatershedYellowstone River-Bearpaw Creek (HUC 100700040401)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended120

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000837.

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 MTR000837.

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.

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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 MTR000837 there.

Nearby on the register

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

What this page shows

This NPDES permit record for MT MARION in Columbus, MT, held by Mt. Marian Enterprises, covers permit MTR000837, which discharges to the Yellowstone River and is listed as effective with a minor discharger class and industrial stormwater program. The page lists 1 pollutant on file, 1 under a numeric limit, 1 with a violation of any kind, and 0 with an effluent exceedance.