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Clean Water Act discharge permit · NPDES MTR111383

WEST YELLOWSTONE KOA, West Yellowstone, MT: NPDES MTR111383 discharge permit, effluent exceedances, inspections, penalties

WEST YELLOWSTONE KOA, held by West Yellowstone Campgrounds LLC, holds NPDES permit MTR111383, which discharges to Buttermilk Creek. EPA’s file records it issued July 7, 2025 and expiring December 31, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for WEST YELLOWSTONE KOA: its NPDES ID, its permit type and status, its dates, its address in West Yellowstone, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR111383.

Identity

Facility as filedWEST YELLOWSTONE KOA
Permittee as filedWest Yellowstone Campgrounds LLC
NPDES IDMTR111383
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJuly 7, 2025
Expiration dateDecember 31, 2027
AddressWest Yellowstone, MT 59758
Receiving waterBUTTERMILK CREEK
SubwatershedLower South Fork Madison River (HUC 100200070205)
SIC4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR111383.

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 MTR111383.

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, MTR111383.

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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 MTR111383 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit MTR111383 for WEST YELLOWSTONE KOA in West Yellowstone, Montana, held by West Yellowstone Campgrounds LLC under the construction stormwater program, with a status of Effective and a minor discharger class. The register lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and records no effluent or single-event violations for the permit.