Clean Water Act discharge permit · NPDES MTG310061
KERNS LARSON FACILITY, Sunburst, MT: NPDES MTG310061 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
KERNS LARSON FACILITY, held by SOMONT OIL CO INC, holds NPDES permit MTG310061, which discharges to Unnamed Alkali Flat. EPA’s file records it issued February 2, 2017 and expiring April 30, 2020. 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 | KERNS LARSON FACILITY |
|---|---|
| Permittee as filed | SOMONT OIL CO INC |
| NPDES ID | MTG310061 |
| 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 |
| Issued | February 2, 2017 |
| Expiration date | April 30, 2020 |
| Address | Sunburst, MT 59482 |
| Receiving water | UNNAMED ALKALI FLAT |
| Subwatershed | Kevin (HUC 100302030301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 5Under a numeric limit
- 7With 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 |
|---|---|---|---|---|---|
| Oil & Grease | 0 | 4 | 4 | March 31, 2026 | 110% over the limit |
| Conductivity | 2 | 4 | 0 | ||
| Sulfate, total [as SO4] | 2 | 4 | 0 | ||
| Flow rate | 1 | 1 | 0 | ||
| Oil and grease, hexane extr method | 1 | 1 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 1 | 0 | ||
| Fluoride | 0 | 1 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 7, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| November 7, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| April 4, 2019 | 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.
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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 MTG310061 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.