Clean Water Act discharge permit · NPDES ND0000248
TESORO REFINING MANDAN, Mandan, ND: NPDES ND0000248 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
TESORO REFINING MANDAN, held by Tesoro Refining, holds NPDES permit ND0000248, which discharges to Painted Woods-Square Butte. EPA’s file records it issued March 28, 2018 and expiring March 31, 2023. 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 | TESORO REFINING MANDAN |
|---|---|
| Permittee as filed | Tesoro Refining |
| NPDES ID | ND0000248 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 28, 2018 |
| Expiration date | March 31, 2023 |
| Issuing agency | North Dakota Department of Environmental Quality |
| Address | Mandan, ND 58554 |
| Receiving water | Painted Woods-Square Butte |
| Subwatershed | Rock Haven Creek-Missouri River (HUC 101301011005) |
| Other EPA IDs (FRS) | RCRA handler NDD006175467; ICIS-AIR source ND0000003805900003 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 20Pollutants on file
- 20Under a numeric limit
- 20With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 14 | 43 | 27 | October 31, 2024 | 462% over the limit |
| Sulfide, total [as S] | 14 | 25 | 9 | July 31, 2026 | 1,720% over the limit |
| pH | 4 | 8 | 4 | June 30, 2023 | |
| Nitrogen, ammonia total [as N] | 14 | 19 | 3 | March 31, 2013 | 50% over the limit |
| BOD, 5-day, 20 deg. C | 14 | 23 | 2 | July 31, 2026 | 22% over the limit |
| Phenolic compounds, unchlorinated | 14 | 17 | 1 | July 31, 2016 | 185% over the limit |
| Oxygen demand, chem. [COD], dissolved | 12 | 13 | 1 | June 30, 2009 | 20% over the limit |
| Toxic Units Static 48HR Acute Ceriodaphnia dubia | 1 | 2 | 1 | September 30, 2022 | 29% over the limit |
| Oil & Grease | 14 | 16 | 0 | ||
| Chromium, hexavalent [as Cr] | 14 | 16 | 0 | ||
| Chromium, total [as Cr] | 14 | 16 | 0 | ||
| Chloride [as Cl] | 9 | 9 | 0 | ||
| Sulfates, total [as SO4] | 9 | 9 | 0 | ||
| Nitrogen, total [as N] | 6 | 6 | 0 | ||
| Phosphorus, total [as P] | 6 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Chemical Oxygen Demand [COD] | 2 | 4 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| TU LC50 Static Renewal 96Hr Acute Pimephales promelas | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES ND0000248.
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
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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 ND0000248 there.
Nearby on the register
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- Every permit record in Mandan, A to Z
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- Every permit record in North Dakota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.