Clean Water Act discharge permit · NPDES MTR000197
MALMSTROM AIR FORCE BASE, Malmstrom Afb, MT: NPDES MTR000197 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
MALMSTROM AIR FORCE BASE holds NPDES permit MTR000197, which discharges to Missouri 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 (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MALMSTROM AIR FORCE BASE |
|---|---|
| Permittee as filed | MALMSTROM AIR FORCE BASE |
| NPDES ID | MTR000197 |
| 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 | Federal facility |
| Program | Industrial stormwater |
| Issued | May 16, 2018 |
| Expiration date | January 31, 2023 |
| Address | Malmstrom Afb, MT 59402 |
| Receiving water | MISSOURI RIVER |
| Subwatershed | Missouri River-Rainbow Dam (HUC 100301021204) |
| SIC | 4225 – General Warehousing And Storage |
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
- 4Pollutants on file
- 0Under a numeric limit
- 4With 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 | 7 | 0 | ||
| Flow rate | 0 | 4 | 0 | ||
| Oxygen demand, chem. [low level] [COD] | 0 | 4 | 0 | ||
| Solids, total suspended | 0 | 4 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTR000197.
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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 27, 2026 | WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMP | ST6 |
| December 6, 2018 | WW Storm Water Non-Construction - Failure to Conduct Inspections | 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, MTR000197.
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 MTR000197 there.
Nearby on the register
- Discharge permits in Malmstrom Afb
- Every permit record in Malmstrom Afb, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.