Clean Water Act discharge permit · NPDES MT0028321
PAR MONTANA LLC, Billings, MT: NPDES MT0028321 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
PAR MONTANA LLC, held by EXXONMOBIL REFINING AND SUPPLY, holds NPDES permit MT0028321, which discharges to Yellowstone River. EPA’s file records it issued March 11, 2015 and expiring April 30, 2020.
PAR MONTANA LLC, Billings, Montana: Individual permit MT0028321, held by EXXONMOBIL REFINING AND SUPPLY; Administratively continued (past its expiration date and still in force until reissued); issued March 11, 2015, term to April 30, 2020; discharges to YELLOWSTONE RIVER.
- Turbidity: 3 limits, 19 violations of any kind, 1 effluent exceedance, latest August 31, 2009.
- Flow rate: 2 limits, 12 violations of any kind, 0 effluent exceedances.
- Oil and grease visual: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- pH: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Oil and grease, hexane extr method: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Flow rate: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- November 29, 2017: Monitoring Violations - Invalid/Unrepresentative Sample (ST6).
PAR MONTANA LLC among its neighbors
EPA’s permit file holds 61 discharge permits in the Yellowstone River-Sevenmile Creek subwatershed (HUC 100700070403), MT0028321 among them. Its county holds 431, 6 of them major permits; MT0028321 is a minor permit.
Other permits in the Yellowstone River-Sevenmile Creek subwatershed (HUC 100700070403)
- BAR ELEVEN SUBDIVISION, Billings: MTG071418, not classed, discharging to FIVE MILE CREEK
- BAR ELEVEN SUBDIVISION, Billings: MTR106488, minor permit, discharging to UPPER YELLOWSTONE - POMPEYS PILLAR, permit term to December 31, 2017
- BBP - RAILROAD OVER PASS, Billings: MTR111828, minor permit, discharging to YELLOWSTONE RIVER, permit term to December 31, 2027
- BELVILLE SUBDIVISION, Billings: MTR102506, minor permit, discharging to YELLOWSTONE RIVER VIA BILLINGS STORMWATER SYSTEM, permit term to December 31, 2007
- BILLINGS #4 TOWN PUMP, Billings: MTR111826, minor permit, discharging to YELLOWSTONE RIVER, permit term to December 31, 2027
- BILLINGS BYPASS - YELLOWSTONE RIVER - NHIP-STPUIP-CMBL-NHPBIP 56(89), Billings: MTR108527, minor permit, discharging to YELLOWSTONE RIVER, permit term to December 31, 2022
- BILLINGS LIVESTOCK COMMISSION, Billings: MTG010161, minor permit, discharging to COULSON DITCH, permit term to October 31, 2023
- BRETZ RV SERVICE CENTER ADDITION, Billings: MTR109806, minor permit, discharging to LOCKWOOD DITCH, permit term to December 31, 2022
- CHAPEL OF HOPE ASSEMBLY OF GOD - UTILITY & SITE IMPROVEMENTS, Billings: MTR101570, minor permit, discharging to YELLOWSTONE RIVER, permit term to December 31, 2011
- CMG CONSTRUCTION TWIN OAKS SUBDIVISION 2ND FILING PH 2, Billings: MTR104808, minor permit, discharging to CITY OF BILLINGS MS4, permit term to December 31, 2012
Identity
| Facility as filed | PAR MONTANA LLC |
|---|---|
| Permittee as filed | EXXONMOBIL REFINING AND SUPPLY |
| NPDES ID | MT0028321 |
| 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 |
| Issued | March 11, 2015 |
| Expiration date | April 30, 2020 |
| Address | Billings, MT 59101 |
| Receiving water | YELLOWSTONE RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Yellowstone River-Sevenmile Creek (HUC 100700070403) |
| SIC | 2911 – Petroleum Refining |
| Other EPA IDs (FRS) | RCRA handler MTD010380574; ICIS-AIR source MT0000003011100013 |
Effluent limits and exceedances
- 6Pollutants on file
- 5Under a numeric limit
- 6With 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 |
|---|---|---|---|---|---|
| Turbidity | 3 | 19 | 1 | August 31, 2009 | |
| Flow rate | 2 | 12 | 0 | ||
| Oil and grease visual | 1 | 6 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Oil and grease, hexane extr method | 1 | 2 | 0 | ||
| Flow rate | 0 | 2 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 29, 2017 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES MT0028321.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES MT0028321.
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, MT0028321.
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
Nearby on the register
- Discharge permits in Billings
- Every permit record in Billings, 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.