Velarion Records

Clean Water Act discharge permit · NPDES LA0082511

WESTLAKE CHEMICAL OPCO LP, Lake Charles, LA: NPDES LA0082511 discharge permit, effluent exceedances, inspections, penalties

WESTLAKE CHEMICAL OPCO LP, held by Westlake Polymers LLC- Westlake Petrochemicial Complex, holds NPDES permit LA0082511, which discharges to Calcasieu River. EPA’s file records it issued July 31, 2015 and expiring September 30, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedWESTLAKE CHEMICAL OPCO LP
Permittee as filedWestlake Polymers LLC- Westlake Petrochemicial Complex
NPDES IDLA0082511
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedJuly 31, 2015
Expiration dateSeptember 30, 2020
AddressLake Charles, LA 70664
Receiving waterCALCASIEU RIVER
Receiving water impaired303(D) Listed
SubwatershedMaple Fork-Bayou D'Inde (HUC 080802060301)
SIC2869 – Industrial Organic Chemicals
Other EPA IDs (FRS)RCRA handler LAR000024596; ICIS-AIR source LA0000002201900145

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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 77 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
pH499March 31, 2014
Benzene499October 31, 2023564% over the limit
Acenaphthylene877December 31, 2013224% over the limit
Naphthalene477January 31, 2013128% over the limit
Solids, total suspended4215April 30, 202562% over the limit
pH range excursions, > 60 minutes164September 30, 20132,147,483,650% over the limit
BOD, 5-day, 20 deg. C4203January 31, 202499,999% over the limit
Coliform, fecal general633June 30, 202299,999% over the limit
Chloroform462June 30, 201648% over the limit
Enterococci042December 31, 202599,999% over the limit
Ethylbenzene422August 31, 2023404% over the limit
pH range excursions, monthly total accum121September 30, 200714% over the limit
Mercury, total [as Hg]011June 30, 200828% over the limit
Flow, in conduit or thru treatment plant10170
Oil and grease5140
Hexachlorobenzene440
Hexachlorobutadiene1200
Carbon tetrachloride800
1,2-Dichloroethane800
Acrylonitrile800
Anthracene800
Benzo[b]fluoranthene800
Benzo[k]fluoranthene800
Chlorobenzene800
Chrysene800
Diethyl phthalate800
Dimethyl phthalate800
Fluoranthene800
Hexachloroethane800
Methyl chloride [Chloromethane]800
Methylene chloride800
Nitrobenzene800
Pyrene800
Tetrachloroethylene800
1,1-Dichloroethane800
1,1-Dichloroethylene800
1,1,1-Trichloroethane800
1,1,2-Trichloroethane800
1,2-Dichlorobenzene800
1,2-Dichloropropane800
trans-1,2-Dichloroethylene800
1,2,4-Trichlorobenzene800
1,3-Dichlorobenzene800
1,4-Dichlorobenzene800
2-Chlorophenol800
2-Nitrophenol800
2,4-Dichlorophenol800
2,4-Dimethylphenol800
2,4-Dinitrotoluene800
2,4-Dinitrophenol800
2,6-Dinitrotoluene800
4-Nitrophenol800
4,6-Dinitro-o-cresol800
Di[2-ethylhexyl] phthalate [DEHP]800
Di-n-butyl phthalate800
Vinyl chloride800
Trichloroethylene800
1,3-Dichloropropylene800
Chloroethane800
Toluene400

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES LA0082511.

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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How we handle your data → Privacy

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 LA0082511 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

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