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Clean Water Act discharge permit · NPDES MTR111930

W.O. 26-01 - CITY OF BILLINGS - SEWER MAIN REPLACEMENTS, Billings, MT: NPDES MTR111930 discharge permit, effluent exceedances, inspections, penalties

W.O. 26-01 - CITY OF BILLINGS - SEWER MAIN REPLACEMENTS, held by WESTERN MUNICIPAL CONSTRUCTION INC, holds NPDES permit MTR111930, which discharges to Suburban Ditch. EPA’s file records it issued July 14, 2026 and expiring December 31, 2027. 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 W.O. 26-01 - CITY OF BILLINGS - SEWER MAIN REPLACEMENTS: its NPDES ID, its permit type and status, its dates, its address in Billings, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR111930.

Identity

Facility as filedW.O. 26-01 - CITY OF BILLINGS - SEWER MAIN REPLACEMENTS
Permittee as filedWESTERN MUNICIPAL CONSTRUCTION INC
NPDES IDMTR111930
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJuly 14, 2026
Expiration dateDecember 31, 2027
AddressBillings, MT 59102
Receiving waterSUBURBAN DITCH
SubwatershedHogans Slough (HUC 100700041003)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MTR111930.

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 MTR111930.

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, MTR111930.

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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 MTR111930 there.

Nearby on the register

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

What this page shows

The permit, filed as W.O. 26-01 - CITY OF BILLINGS - SEWER MAIN REPLACEMENTS, is one of 262 storm water construction permits on EPA's NPDES register in Yellowstone County, and it sits among 47 NPDES permits in the Hogans Slough subwatershed. Of the 253 storm water construction permits in Yellowstone County, 97.2% carry an earlier issue date than this one, and the record shows no pollutants under a numeric limit and no effluent exceedances.