Clean Water Act discharge permit · NPDES MT0000400
CITY OF HARLOWTON - OIL SKIMMER, Harlowton, MT: NPDES MT0000400 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
CITY OF HARLOWTON - OIL SKIMMER, held by CITY OF HARLOWTON, holds NPDES permit MT0000400, which discharges to Musselshell River. EPA’s file records it issued January 28, 2013 and expiring February 28, 2018. 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.
Identity
| Facility as filed | CITY OF HARLOWTON - OIL SKIMMER |
|---|---|
| Permittee as filed | CITY OF HARLOWTON |
| NPDES ID | MT0000400 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 28, 2013 |
| Expiration date | February 28, 2018 |
| Address | Harlowton, MT 59036 |
| Receiving water | MUSSELSHELL RIVER |
| Subwatershed | Musselshell River-Harlowton (HUC 100402011003) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 5Under a numeric limit
- 4With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Petrol hydrocarbons, total recoverable | 0 | 7 | 2 | June 30, 2012 | 162% over the limit |
| Flow rate | 2 | 19 | 0 | ||
| pH | 2 | 11 | 0 | ||
| Solids, total suspended | 1 | 5 | 0 | ||
| Oil and grease, hexane extr method | 1 | 0 | 0 | ||
| Oil and grease visual | 1 | 0 | 0 |
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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0000400.
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, MT0000400.
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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 MT0000400 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.