Clean Water Act discharge permit · NPDES MTG130004
BIG SPRINGS TROUT HATCHERY, Lewistown, MT: NPDES MTG130004 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
BIG SPRINGS TROUT HATCHERY, held by MONTANA FISH WILDLIFE AND PARKS, holds NPDES permit MTG130004, which discharges to Big Spring Crk. EPA’s file records it issued August 22, 2011 and expiring June 30, 2016. 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 | BIG SPRINGS TROUT HATCHERY |
|---|---|
| Permittee as filed | MONTANA FISH WILDLIFE AND PARKS |
| NPDES ID | MTG130004 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 22, 2011 |
| Expiration date | June 30, 2016 |
| Issuing agency | MONTANA DEQ |
| Address | Lewistown, MT 59457 |
| Receiving water | BIG SPRING CRK |
| Subwatershed | Upper Big Spring Creek (HUC 100401030703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 0With 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 | 6 | 0 | 0 | ||
| Fish feed used | 6 | 0 | 0 | ||
| Solids, total suspended | 3 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 3 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG130004.
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 1, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 1, 2026 | Reporting Violations - Improper/ Incorrect Reporting | 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, MTG130004.
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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 MTG130004 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.