Clean Water Act discharge permit · NPDES LA0005479
EXXON MOBIL CORPORATION - BATON ROUGE POLYOLEFINS PLANT, Baton Rouge, LA: NPDES LA0005479 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 80Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
EXXON MOBIL CORPORATION - BATON ROUGE POLYOLEFINS PLANT, held by Exxon Mobil Corporation - Baton Rouge Polyolefins Plant, holds NPDES permit LA0005479, which discharges to 0701. EPA’s file records it issued November 1, 2017 and expiring November 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | EXXON MOBIL CORPORATION - BATON ROUGE POLYOLEFINS PLANT |
|---|---|
| Permittee as filed | Exxon Mobil Corporation - Baton Rouge Polyolefins Plant |
| NPDES ID | LA0005479 |
| 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 | November 1, 2017 |
| Expiration date | November 30, 2022 |
| Address | Baton Rouge, LA 70892 |
| Receiving water | 0701 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Devils Swamp-Bayou Baton Rouge (HUC 080702010402) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 80Pollutants on file
- 80Under a numeric limit
- 19With a violation of any kind
- 2With 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; the 60 with the most exceedances of 80 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 5 | 2 | October 31, 2019 | 51% over the limit |
| pH range excursions, > 60 minutes | 1 | 1 | 1 | April 30, 2014 | 2,147,483,650% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 6 | 0 | ||
| Chromium, total [as Cr] | 8 | 4 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 6 | 4 | 0 | ||
| BOD, 5-day, 20 deg. C | 4 | 4 | 0 | ||
| pH | 4 | 4 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| Zinc, total [as Zn] | 8 | 3 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 2 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Oil and grease | 1 | 2 | 0 | ||
| Carbon, tot organic [TOC] | 3 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 8 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 8 | 0 | 0 | ||
| WET, sublethal retest #1 | 8 | 0 | 0 | ||
| WET, sublethal retest #2 | 8 | 0 | 0 | ||
| Vinyl chloride | 8 | 0 | 0 | ||
| 1,3-Dichloropropylene | 8 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 8 | 0 | 0 | ||
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 8 | 0 | 0 | ||
| Chromium, hexavalent [as Cr] | 4 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Carbon tetrachloride | 2 | 0 | 0 | ||
| 1,2-Dichloroethane | 2 | 0 | 0 | ||
| Chloroform | 2 | 0 | 0 | ||
| Toluene | 2 | 0 | 0 | ||
| Benzene | 2 | 0 | 0 | ||
| Acenaphthylene | 2 | 0 | 0 | ||
| Acenaphthene | 2 | 0 | 0 | ||
| Acrylonitrile | 2 | 0 | 0 | ||
| Anthracene | 2 | 0 | 0 | ||
| Benzo[b]fluoranthene | 2 | 0 | 0 | ||
| Benzo[k]fluoranthene | 2 | 0 | 0 | ||
| Benzo[a]pyrene | 2 | 0 | 0 | ||
| Chlorobenzene | 2 | 0 | 0 | ||
| Chrysene | 2 | 0 | 0 | ||
| Diethyl phthalate | 2 | 0 | 0 | ||
| Dimethyl phthalate | 2 | 0 | 0 | ||
| Ethylbenzene | 2 | 0 | 0 | ||
| Fluoranthene | 2 | 0 | 0 | ||
| Fluorene | 2 | 0 | 0 | ||
| Hexachlorobutadiene | 2 | 0 | 0 | ||
| Hexachloroethane | 2 | 0 | 0 | ||
| Methyl chloride [Chloromethane] | 2 | 0 | 0 | ||
| Methylene chloride | 2 | 0 | 0 | ||
| Nitrobenzene | 2 | 0 | 0 | ||
| Phenanthrene | 2 | 0 | 0 | ||
| Pyrene | 2 | 0 | 0 | ||
| Tetrachloroethylene | 2 | 0 | 0 | ||
| 1,1-Dichloroethane | 2 | 0 | 0 | ||
| 1,1-Dichloroethylene | 2 | 0 | 0 | ||
| 1,1,1-Trichloroethane | 2 | 0 | 0 | ||
| 1,1,2-Trichloroethane | 2 | 0 | 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 LA0005479.
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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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.