Clean Water Act discharge permit · NPDES MTR000295
MISSOULA COUNTY AIRPORT, Missoula, MT: NPDES MTR000295 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MISSOULA COUNTY AIRPORT, held by MISSOULA INTERNATIONAL AIRPORT, holds NPDES permit MTR000295, which discharges to Clark Fork River. EPA’s file records it issued May 16, 2018 and expiring January 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MISSOULA COUNTY AIRPORT |
|---|---|
| Permittee as filed | MISSOULA INTERNATIONAL AIRPORT |
| NPDES ID | MTR000295 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | May 16, 2018 |
| Expiration date | January 31, 2023 |
| Address | Missoula, MT 59808 |
| Receiving water | CLARK FORK RIVER |
| Subwatershed | Grant Creek (HUC 170102040103) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 3Pollutants on file
- 0Under a numeric limit
- 3With a violation of any kind
- 0With an effluent exceedance
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 measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Oil and grease visual | 0 | 4 | 0 | ||
| Solids, total suspended | 0 | 3 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 3 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000295.
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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 13, 2023 | WW Storm Water Non-Construction - Failure to Conduct Inspections | ST6 |
| April 13, 2023 | WW Storm Water Non-Construction - Failure to properly operate and maintain BMPs | ST6 |
| April 13, 2023 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| April 13, 2023 | WW Storm Water Non-Construction - Failure to Maintain Records | ST6 |
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, MTR000295.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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 MTR000295 there.
Nearby on the register
- Discharge permits in Missoula
- Every permit record in Missoula, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.