Clean Water Act discharge permit · NPDES MTR000309
GLACIER PARK INTERNATIONAL AIRPORT, Kalispell, MT: NPDES MTR000309 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
GLACIER PARK INTERNATIONAL AIRPORT, held by FLATHEAD MUNICIPAL AIRPORT AUTHORITY, holds NPDES permit MTR000309, which discharges to Trumble Creek. EPA’s file records it issued April 26, 2018 and expiring January 31, 2023. 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.
Identity
| Facility as filed | GLACIER PARK INTERNATIONAL AIRPORT |
|---|---|
| Permittee as filed | FLATHEAD MUNICIPAL AIRPORT AUTHORITY |
| NPDES ID | MTR000309 |
| 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 | April 26, 2018 |
| Expiration date | January 31, 2023 |
| Address | Kalispell, MT 59901 |
| Receiving water | TRUMBLE CREEK |
| Subwatershed | Spring Creek (HUC 170102080104) |
| SIC | 4581 – Airports, Flying Fields, & Services |
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
- 5Pollutants on file
- 0Under a numeric limit
- 5With 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 |
|---|---|---|---|---|---|
| Flow rate | 0 | 4 | 0 | ||
| Oxygen demand, chem. [low level] [COD] | 0 | 4 | 0 | ||
| Solids, total suspended | 0 | 4 | 0 | ||
| Oil and grease visual | 0 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 2 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000309.
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 |
|---|---|---|
| May 18, 2023 | WW Storm Water Non-Construction - Failure to Conduct Inspections | ST6 |
| May 18, 2023 | WW Storm Water Non-Construction - Failure to properly install/implement BMPs | ST6 |
| May 18, 2023 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| May 18, 2023 | WW Storm Water Non-Construction - Failure to Implement SWPPP/SWMP | 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
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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 MTR000309 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.