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NPDES MTR040010 · Clean Water Act

YELLOWSTONE COUNTY/MDT SMALL MS-4, Billings, MT: NPDES MTR040010 discharge permit, effluent exceedances, inspections, penalties

YELLOWSTONE COUNTY/MDT SMALL MS-4, Billings, Montana: General permit coverage MTR040010, held by YELLOWSTONE COUNTY; Small municipal storm sewer systems; Administratively continued; issued January 1, 2015, term to December 31, 2016, by MONTANA DEQ; discharges to YELLOWSTONE RIVER.

  • June 23, 2026: CWA 309G2A AO For Class I Penalties (EPA), $22,400 federal penalty.
  • April 1, 2022: Discharge from a MS4 to waters of the U.S. without NPDES permit coverage (EP6).
  • April 1, 2022: Failure to submit required application or NOI regarding MS4 operation or MS4 stormwater discharges (EP6).
  • December 31, 2021: Discharge from a MS4 to waters of the U.S. without NPDES permit coverage (EP6).
  • June 14, 2018: WW Storm Water MS4 - Failure to develop any or adequate SWPPP/SWMP (ST6).

Montana holds 16 Small municipal storm sewer systems coverages of this permit type in EPA’s file; 1 were issued before MTR040010. YELLOWSTONE COUNTY holds 6 permits in Montana.

Other permits held by YELLOWSTONE COUNTY

Coverages issued nearest MTR040010

YELLOWSTONE COUNTY/MDT SMALL MS-4 among its neighbors

157 discharge permits are in the Yellowstone River-Billings subwatershed (HUC 100700041006); MTR040010 is one. Its county: 431, 6 major; MTR040010 is minor permit.

Other permits in the Yellowstone River-Billings subwatershed (HUC 100700041006)

Identity

FacilityYELLOWSTONE COUNTY/MDT SMALL MS-4
PermitteeYELLOWSTONE COUNTY
NPDES IDMTR040010
StatusAdministratively continued
TypeGeneral permit coverage
ClassMinor
Facility typeNon-POTW
ProgramSmall municipal storm sewer systems
IssuedJanuary 1, 2015
ExpiresDecember 31, 2016
AgencyMONTANA DEQ
AddressBillings, MT 59107
Receiving waterYELLOWSTONE RIVER
SubwatershedYellowstone River-Billings (HUC 100700041006)
SIC9511 – Air, Water, & Solid Waste Management

NPDES MTR040010: effluent limits and exceedances

YELLOWSTONE COUNTY/MDT SMALL MS-4 (NPDES MTR040010): 0 pollutants on file, 0 limited; 0 with a violation of any kind, 0 with an exceedance.

NPDES MTR040010: no pollutant row on file.

NPDES MTR040010: inspections, violations and enforcement

NPDES MTR040010: 4 single-event violations

DateWhat EPA recordedAgency
April 1, 2022Discharge from a MS4 to waters of the U.S. without NPDES permit coverageEP6
April 1, 2022Failure to submit required application or NOI regarding MS4 operation or MS4 stormwater dischargesEP6
December 31, 2021Discharge from a MS4 to waters of the U.S. without NPDES permit coverageEP6
June 14, 2018WW Storm Water MS4 - Failure to develop any or adequate SWPPP/SWMPST6

NPDES MTR040010: 1 formal enforcement action

1 of them with a penalty assessed. How penalties are shown.

DateWhat EPA recordedAgencyFederal penaltyState or local penalty
June 23, 2026CWA 309G2A AO For Class I PenaltiesEPA$22,400

NPDES MTR040010 (YELLOWSTONE COUNTY/MDT SMALL MS-4): no inspection and informal enforcement action on file.

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Permits near NPDES MTR040010

NPDES MTR040010: 0 pollutant rows, 5 dated events; ICIS-NPDES download, loaded October 14, 2026.