Clean Water Act discharge permit · NPDES LA0056171
OCCIDENTAL CHEMICAL CORPORATION -CONVENT PLANT, Convent, LA: NPDES LA0056171 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 87Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
OCCIDENTAL CHEMICAL CORPORATION -CONVENT PLANT, held by OCCIDENTAL CHEM CORP-CONVENT, holds NPDES permit LA0056171, which discharges to Mississippi River. EPA’s file records it issued October 5, 2016 and expiring October 31, 2021.
OCCIDENTAL CHEMICAL CORPORATION -CONVENT PLANT, Convent, Louisiana: Individual permit LA0056171, held by OCCIDENTAL CHEM CORP-CONVENT; Administratively continued (past its expiration date and still in force until reissued); issued October 5, 2016, term to October 31, 2021; discharges to MISSISSIPPI RIVER.
- BOD, 5-day, 20 deg. C: 2 limits, 6 violations of any kind, 6 effluent exceedances, latest October 31, 2024, largest 399% over the limit.
- pH: 10 limits, 6 violations of any kind, 2 effluent exceedances, latest December 31, 2017.
- Coliform, fecal general: 2 limits, 5 violations of any kind, 1 effluent exceedance, latest March 31, 2013, largest 26% over the limit.
- Flow, in conduit or thru treatment plant: 14 limits, 28 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 2 limits, 20 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 18 violations of any kind, 0 effluent exceedances.
- Chloroform: 6 limits, 17 violations of any kind, 0 effluent exceedances.
- 1,2-Dichloroethane: 4 limits, 14 violations of any kind, 0 effluent exceedances.
- Tetrachloroethylene: 4 limits, 4 violations of any kind, 0 effluent exceedances.
- 1,2-Dichloropropane: 4 limits, 4 violations of any kind, 0 effluent exceedances.
- Trichloroethylene: 4 limits, 4 violations of any kind, 0 effluent exceedances.
- Lead, total [as Pb]: 6 limits, 2 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- Cyanide, total [as CN]: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- Zinc, total [as Zn]: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- Carbon tetrachloride: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- Methylene chloride: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- 1,1,1-Trichloroethane: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- 1,1,2-Trichloroethane: 4 limits, 2 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Mercury, total [as Hg]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 48Hr Acute D. pulex: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 48Hr Acute Pimephales promelas: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- 1,3-Dichloropropylene: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Carbon, tot organic [TOC]: 4 limits, 1 violation of any kind, 0 effluent exceedances.
- Oil and grease: 0 limits, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 8 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 8 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole Effluent Toxicity - Retest #3: 8 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzene: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Oil & Grease: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Chromium, total [as Cr]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Toluene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Acenaphthylene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Acenaphthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Acrylonitrile: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Anthracene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzo[b]fluoranthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzo[k]fluoranthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzo[a]pyrene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Chlorobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Chrysene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Diethyl phthalate: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Dimethyl phthalate: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Ethylbenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Fluoranthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Fluorene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Hexachlorobutadiene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Hexachloroethane: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Methyl chloride [Chloromethane]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Phenanthrene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Pyrene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- 1,1-Dichloroethane: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- 1,1-Dichloroethylene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzo[a]anthracene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- 1,2-Dichlorobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- trans-1,2-Dichloroethylene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- 1,2,4-Trichlorobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- 1,3-Dichlorobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- August 20, 2026: Evaluation (S).
OCCIDENTAL CHEMICAL CORPORATION -CONVENT PLANT among its neighbors
EPA’s permit file holds 63 discharge permits in the Claiborne Island subwatershed (HUC 080701000105), LA0056171 among them. Its county holds 45, 6 of them major permits; LA0056171 is a major permit.
Other permits in the Claiborne Island subwatershed (HUC 080701000105)
- ACBL TRANSPORTATION SVCS LLC - CONVENT FACILITY, Convent: LA0069809, minor permit, discharging to MISS RIVER, permit term to December 31, 2012
- AIR LIQUIDE LARGE INDUSTRIES U.S. LP, Geismar: LA0006220, major permit, discharging to SEG 070301 MISSISSIPPI RIVER BASIN, permit term to December 31, 2020
- ALMATIS BURNSIDE LLC, Burnside: LA0005606, major permit, discharging to SEG 070301 MISSISSIPPI RIVER, permit term to May 31, 2015
- AMERICAS STYRENICS, LLC- ST. JAMES PLANT, St. James: LA0029963, major permit, discharging to MISSISSIPPI RIVER, permit term to June 30, 2019
- ARCHER DANIELS MIDLAND CO. - TULANE FLEETING INC, Ama: LA0088609, minor permit, discharging to MISSISSIPPI, permit term to October 31, 2012
- ARMANT FLEET, Vacherie: LA0090182, minor permit, discharging to MISS. RIVER, permit term to June 30, 2009
- ASSOCIATED GRAIN TERMINALS LLC - MYRTLE GROVE MIDSTREAM TERMINAL MGMT FACILITY, Statewide: LA0076368, minor permit, permit term to December 31, 2028
- ASSOCIATED TERMINALS LLC - ALEX G MIDSTREAM LOADER, Convent: LA0120162, minor permit, permit term to June 30, 2010
- ATALCO GRAMERCY LLC - NORANDA ALUMINA - GRAMERCY BULK TERMINAL, Mount Airy: LAG481019, minor permit, permit term to November 30, 2020
- BASF CORP-GEISMAR, Geismar: LA0002950, major permit, discharging to MISSISSIPPI RIVER, permit term to October 31, 2022
Identity
| Facility as filed | OCCIDENTAL CHEMICAL CORPORATION -CONVENT PLANT |
|---|---|
| Permittee as filed | OCCIDENTAL CHEM CORP-CONVENT |
| NPDES ID | LA0056171 |
| 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 | October 5, 2016 |
| Expiration date | October 31, 2021 |
| Address | Convent, LA 70723 |
| Receiving water | MISSISSIPPI RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Claiborne Island (HUC 080701000105) |
| SIC | 2812 – Alkalies And Chlorine |
| Other EPA IDs (FRS) | RCRA handler LAD098168206; ICIS-AIR source LA0000002209300019 |
Effluent limits and exceedances
- 89Pollutants on file
- 87Under a numeric limit
- 26With a violation of any kind
- 3With 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 89 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 2 | 6 | 6 | October 31, 2024 | 399% over the limit |
| pH | 10 | 6 | 2 | December 31, 2017 | |
| Coliform, fecal general | 2 | 5 | 1 | March 31, 2013 | 26% over the limit |
| Flow, in conduit or thru treatment plant | 14 | 28 | 0 | ||
| Chlorine, total residual | 2 | 20 | 0 | ||
| Nickel, total [as Ni] | 2 | 18 | 0 | ||
| Chloroform | 6 | 17 | 0 | ||
| 1,2-Dichloroethane | 4 | 14 | 0 | ||
| Tetrachloroethylene | 4 | 4 | 0 | ||
| 1,2-Dichloropropane | 4 | 4 | 0 | ||
| Trichloroethylene | 4 | 4 | 0 | ||
| Lead, total [as Pb] | 6 | 2 | 0 | ||
| Solids, total suspended | 4 | 2 | 0 | ||
| Cyanide, total [as CN] | 4 | 2 | 0 | ||
| Zinc, total [as Zn] | 4 | 2 | 0 | ||
| Carbon tetrachloride | 4 | 2 | 0 | ||
| Methylene chloride | 4 | 2 | 0 | ||
| 1,1,1-Trichloroethane | 4 | 2 | 0 | ||
| 1,1,2-Trichloroethane | 4 | 2 | 0 | ||
| Phosphorus, total [as P] | 2 | 2 | 0 | ||
| Mercury, total [as Hg] | 2 | 2 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 2 | 2 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 2 | 2 | 0 | ||
| 1,3-Dichloropropylene | 0 | 2 | 0 | ||
| Carbon, tot organic [TOC] | 4 | 1 | 0 | ||
| Oil and grease | 0 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 8 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 8 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 8 | 0 | 0 | ||
| Benzene | 6 | 0 | 0 | ||
| Oil & Grease | 4 | 0 | 0 | ||
| Chromium, total [as Cr] | 4 | 0 | 0 | ||
| Toluene | 4 | 0 | 0 | ||
| Acenaphthylene | 4 | 0 | 0 | ||
| Acenaphthene | 4 | 0 | 0 | ||
| Acrylonitrile | 4 | 0 | 0 | ||
| Anthracene | 4 | 0 | 0 | ||
| Benzo[b]fluoranthene | 4 | 0 | 0 | ||
| Benzo[k]fluoranthene | 4 | 0 | 0 | ||
| Benzo[a]pyrene | 4 | 0 | 0 | ||
| Chlorobenzene | 4 | 0 | 0 | ||
| Chrysene | 4 | 0 | 0 | ||
| Diethyl phthalate | 4 | 0 | 0 | ||
| Dimethyl phthalate | 4 | 0 | 0 | ||
| Ethylbenzene | 4 | 0 | 0 | ||
| Fluoranthene | 4 | 0 | 0 | ||
| Fluorene | 4 | 0 | 0 | ||
| Hexachlorobutadiene | 4 | 0 | 0 | ||
| Hexachloroethane | 4 | 0 | 0 | ||
| Methyl chloride [Chloromethane] | 4 | 0 | 0 | ||
| Nitrobenzene | 4 | 0 | 0 | ||
| Phenanthrene | 4 | 0 | 0 | ||
| Pyrene | 4 | 0 | 0 | ||
| 1,1-Dichloroethane | 4 | 0 | 0 | ||
| 1,1-Dichloroethylene | 4 | 0 | 0 | ||
| Benzo[a]anthracene | 4 | 0 | 0 | ||
| 1,2-Dichlorobenzene | 4 | 0 | 0 | ||
| trans-1,2-Dichloroethylene | 4 | 0 | 0 | ||
| 1,2,4-Trichlorobenzene | 4 | 0 | 0 | ||
| 1,3-Dichlorobenzene | 4 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES LA0056171.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| August 20, 2026 | Evaluation | S |
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 LA0056171.
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, LA0056171.
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 Convent
- Every permit record in Convent, A to Z
- Discharge permits in Louisiana
- Every permit record in Louisiana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.