NPDES MTG770010 · Clean Water Act
CENEX LAUREL REFINERY, Laurel, MT: NPDES MTG770010 discharge permit, effluent exceedances, inspections, penalties
CENEX LAUREL REFINERY, Laurel, Montana: General permit coverage MTG770010, held by CENEX HARVEST STATES; Administratively continued; issued January 13, 2021, term to December 31, 2025; discharges to YELLOWSTONE RIVER.
- Chlorine, total residual: 1 limit, 6 violations of any kind, 2 effluent exceedances, latest June 30, 2025, largest 600% over the limit.
- Xylene [mix of m+o+p]: 1 limit, 4 violations of any kind, 1 effluent exceedance, latest October 31, 2018, largest 20% over the limit.
- Solids, total suspended: 1 limit, 7 violations of any kind.
- Oil and grease, hexane extr method: 0 limits, 6 violations of any kind.
- Flow rate: 2 limits, 3 violations of any kind.
- Toluene: 1 limit, 3 violations of any kind.
- Benzene: 1 limit, 3 violations of any kind.
- Ethylbenzene: 1 limit, 3 violations of any kind.
- pH: 2 limits, 2 violations of any kind.
- Oil and grease visual: 1 limit, 2 violations of any kind.
- Oil & Grease: 1 limit, 1 violation of any kind.
CENEX LAUREL REFINERY among its neighbors
31 discharge permits are in the Yellowstone River-Indian Creek subwatershed (HUC 100700040602); MTG770010 is one. Its county: 431, 6 major; MTG770010 is minor permit.
Other permits in the Yellowstone River-Indian Creek subwatershed (HUC 100700040602)
- 2024 ELK BASIN-BILLINGS REPLACEMENT PROJECT, Billings: MTR110625, minor, term to 2027-12-31
- BNSF LAUREL FUELING FACILITY, Laurel: MTG071408, minor, term to 2030-04-30
- BNSF LAUREL FUELING FACILITY, Laurel: MTR111573, minor, term to 2027-12-31
- BNSF RAILWAY LAUREL RAIL YARD, Laurel: MTR000484, minor, term to 2023-01-31
- CHERRY HILLS 4TH FILING, Laurel: MTR111704, minor, term to 2027-12-31
- CHS INC, Laurel: MT0000264, major, term to 2020-10-31
- CHS INC - LAUREL REFINERY, Laurel: MTR000099, minor, term to 2023-01-31
- CHS INC LAUREL REFINERY DEWATERING, Laurel: MTG070664, minor, term to 2025-02-28
- CHS- TA PARKING LOT, Laurel: MTR109646, minor, term to 2022-12-31
- CITY OF LAUREL WASTE WATER TREATMENT PLANT, Laurel: MTR000535, minor, term to 2023-01-31
Identity
| Facility | CENEX LAUREL REFINERY |
|---|---|
| Permittee | CENEX HARVEST STATES |
| NPDES ID | MTG770010 |
| Status | Administratively continued |
| Type | General permit coverage |
| Class | Minor |
| Facility type | Non-POTW |
| Issued | January 13, 2021 |
| Expires | December 31, 2025 |
| Address | Laurel, MT 59044 |
| Receiving water | YELLOWSTONE RIVER |
| Subwatershed | Yellowstone River-Indian Creek (HUC 100700040602) |
| SIC | 2911 – Petroleum Refining |
| Other EPA IDs (FRS) | RCRA handler MTD006238083; ICIS-AIR source MT0000003011100012 |
NPDES MTG770010: effluent limits and exceedances
CENEX LAUREL REFINERY (NPDES MTG770010): 11 pollutants on file, 10 limited; 11 with a violation of any kind, 2 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 1 | 6 | 2 | June 30, 2025 | 600% over the limit |
| Xylene [mix of m+o+p] | 1 | 4 | 1 | October 31, 2018 | 20% over the limit |
| Solids, total suspended | 1 | 7 | 0 | ||
| Oil and grease, hexane extr method | 0 | 6 | 0 | ||
| Flow rate | 2 | 3 | 0 | ||
| Toluene | 1 | 3 | 0 | ||
| Benzene | 1 | 3 | 0 | ||
| Ethylbenzene | 1 | 3 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Oil and grease visual | 1 | 2 | 0 | ||
| Oil & Grease | 1 | 1 | 0 |
NPDES MTG770010: inspections, violations and enforcement
NPDES MTG770010 (CENEX LAUREL REFINERY): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES MTG770010
NPDES MTG770010: one email when its EPA record changes — $99/month.
Permits near NPDES MTG770010
NPDES MTG770010: 11 pollutant rows, 0 dated events; ICIS-NPDES download, loaded October 14, 2026.