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Clean Water Act discharge permit · NPDES MTR102233

CENTURY COMPANIES INC - MARCO FACILITY 921, Saint Marie, MT: NPDES MTR102233 discharge permit, effluent exceedances, inspections, penalties

CENTURY COMPANIES INC - MARCO FACILITY 921, held by MONTANA AVIATION RESEARCH CO, holds NPDES permit MTR102233, which discharges to Unnamed Coulee To Cherry Creek. EPA’s file records it issued June 16, 2006 and expiring December 31, 2007. 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 CENTURY COMPANIES INC - MARCO FACILITY 921: its NPDES ID, its permit type and status, its dates, its address in Saint Marie, Montana, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTR102233.

Identity

Facility as filedCENTURY COMPANIES INC - MARCO FACILITY 921
Permittee as filedMONTANA AVIATION RESEARCH CO
NPDES IDMTR102233
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJune 16, 2006
Expiration dateDecember 31, 2007
Issuing agencyMONTANA DEQ
AddressSaint Marie, MT 59231
Receiving waterUNNAMED COULEE TO CHERRY CREEK
SubwatershedUpper East Fork Cherry Creek (HUC 100500120602)

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 MTR102233.

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 MTR102233.

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, MTR102233.

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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 MTR102233 there.

Nearby on the register

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

What this page shows

The Upper East Fork Cherry Creek subwatershed (HUC 100500120602) has 1 NPDES permit, which is CENTURY COMPANIES INC - MARCO FACILITY 921's. Valley County has 24 storm water construction permits on EPA's NPDES register, and 0.0% of them carry a violation on file.