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Westlake Vinyls Company, LP

Industrial Organic Chemicals, major discharger, Geismar, Louisiana. NPDES permit LA0000281, in force until Jul 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (28 values), outfall 001 form Q quarterly (10 values), outfall 002 form Q quarterly (12 values), outfall 001 form DA yearly, outfall 001 form PI yearly, outfall 001 form YY yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 23 reports late

Limits in force (166)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 898 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 2382 lb/dall year001
pHminimumreport only (SU)all year001
pHmaximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 3146 lb/dall year001
Solids, total suspendeddaily maximum≤ 8514 lb/dall year001
Chloride [as Cl]monthly averagereport only (ug/L)all year001
Chloride [as Cl]daily maximumreport only (ug/L)all year001
Copper, total [as Cu]monthly average≤ 42.41 lb/dall year001
Copper, total [as Cu]daily maximum≤ 100.59 lb/dall year001
Lead, total [as Pb]monthly average≤ 7.22 lb/dall year001
Lead, total [as Pb]daily maximum≤ 17.76 lb/dall year001
Nickel, total [as Ni]monthly average≤ 11.14 lb/dall year001
Nickel, total [as Ni]daily maximum≤ 29.2 lb/dall year001
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year001
Carbon tetrachloridemonthly average≤ .34 lb/dall year001
Carbon tetrachloridedaily maximum≤ .72 lb/dall year001
1,2-Dichloroethanemonthly average≤ 1.3 lb/dall year001
1,2-Dichloroethanedaily maximum≤ 4.02 lb/dall year001
Chloroformmonthly average≤ .4 lb/dall year001
Chloroformdaily maximum≤ .88 lb/dall year001
Toluenemonthly average≤ .5 lb/dall year001
Toluenedaily maximum≤ 1.53 lb/dall year001
Benzenemonthly average≤ .71 lb/dall year001
Benzenedaily maximum≤ 2.59 lb/dall year001
Acenaphthylenemonthly average≤ .42 lb/dall year001
Acenaphthylenedaily maximum≤ 1.13 lb/dall year001
Acenaphthenemonthly average≤ .42 lb/dall year001
Acenaphthenedaily maximum≤ 1.13 lb/dall year001
Acrylonitrilemonthly average≤ 1.83 lb/dall year001
Acrylonitriledaily maximum≤ 4.62 lb/dall year001
Anthracenemonthly average≤ .42 lb/dall year001
Anthracenedaily maximum≤ 1.13 lb/dall year001
Benzo[b]fluoranthenemonthly average≤ .44 lb/dall year001
Benzo[b]fluoranthenedaily maximum≤ 1.16 lb/dall year001
Benzo[k]fluoranthenemonthly average≤ .42 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ 1.13 lb/dall year001
Benzo[a]pyrenemonthly average≤ .44 lb/dall year001
Benzo[a]pyrenedaily maximum≤ 1.16 lb/dall year001
Chlorobenzenemonthly average≤ .29 lb/dall year001
Chlorobenzenedaily maximum≤ .53 lb/dall year001
Chrysenemonthly average≤ .42 lb/dall year001
Chrysenedaily maximum≤ 1.13 lb/dall year001
Diethyl phthalatemonthly average≤ 1.54 lb/dall year001
Diethyl phthalatedaily maximum≤ 3.87 lb/dall year001
Dimethyl phthalatemonthly average≤ .36 lb/dall year001
Dimethyl phthalatedaily maximum≤ .9 lb/dall year001
Ethylbenzenemonthly average≤ .61 lb/dall year001
Ethylbenzenedaily maximum≤ 2.06 lb/dall year001
Fluoranthenemonthly average≤ .48 lb/dall year001
Fluoranthenedaily maximum≤ 1.3 lb/dall year001
Fluorenemonthly average≤ .42 lb/dall year001
Fluorenedaily maximum≤ 1.13 lb/dall year001
Hexachlorobutadienemonthly average≤ .38 lb/dall year001
Hexachlorobutadienedaily maximum≤ .93 lb/dall year001
Hexachloroethanemonthly average≤ .4 lb/dall year001
Hexachloroethanedaily maximum≤ 1.03 lb/dall year001
Methyl chloride [Chloromethane]monthly average≤ 1.64 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ 3.62 lb/dall year001
Methylene chloridemonthly average≤ .76 lb/dall year001
Methylene chloridedaily maximum≤ 1.7 lb/dall year001
Nitrobenzenemonthly average≤ .51 lb/dall year001
Nitrobenzenedaily maximum≤ 1.3 lb/dall year001
Phenanthrenemonthly average≤ .42 lb/dall year001
Phenanthrenedaily maximum≤ 1.13 lb/dall year001
Pyrenemonthly average≤ .16 lb/dall year001
Pyrenedaily maximum≤ .43 lb/dall year001
Tetrachloroethylenemonthly average≤ .42 lb/dall year001
Tetrachloroethylenedaily maximum≤ 1.07 lb/dall year001
1,1-Dichloroethanemonthly average≤ .42 lb/dall year001
1,1-Dichloroethanedaily maximum≤ 1.13 lb/dall year001
1,1-Dichloroethylenemonthly average≤ .31 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ .48 lb/dall year001
1,1,1-Trichloroethanemonthly average≤ .4 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ 1.03 lb/dall year001
1,1,2-Trichloroethanemonthly average≤ .4 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ 1.03 lb/dall year001
Benzo[a]anthracenemonthly average≤ .42 lb/dall year001
Benzo[a]anthracenedaily maximum≤ 1.13 lb/dall year001
1,2-Dichlorobenzenemonthly average≤ 1.47 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ 3.11 lb/dall year001
1,2-Dichloropropanemonthly average≤ 2.92 lb/dall year001
1,2-Dichloropropanedaily maximum≤ 4.39 lb/dall year001
trans-1,2-Dichloroethylenemonthly average≤ .14 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ .35 lb/dall year001
1,2,4-Trichlorobenzenemonthly average≤ .44 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ .9 lb/dall year001
1,3-Dichlorobenzenemonthly average≤ .59 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ .84 lb/dall year001
1,4-Dichlorobenzenemonthly average≤ .29 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ .53 lb/dall year001
2-Chlorophenolmonthly average≤ .59 lb/dall year001
2-Chlorophenoldaily maximum≤ 1.87 lb/dall year001
2-Nitrophenolmonthly average≤ .78 lb/dall year001
2-Nitrophenoldaily maximum≤ 1.32 lb/dall year001
2,4-Dichlorophenolmonthly average≤ .74 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ 2.14 lb/dall year001
2,4-Dimethylphenolmonthly average≤ .34 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ .69 lb/dall year001
2,4-Dinitrotoluenemonthly average≤ 2.16 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ 5.44 lb/dall year001
2,4-Dinitrophenolmonthly average≤ 1.35 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ 2.35 lb/dall year001
2,6-Dinitrotoluenemonthly average≤ 4.86 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ 12.23 lb/dall year001
4-Nitrophenolmonthly average≤ 1.37 lb/dall year001
4-Nitrophenoldaily maximum≤ 2.37 lb/dall year001
4,6-Dinitro-o-cresolmonthly average≤ 1.49 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ 5.28 lb/dall year001
Phenolmonthly average≤ .29 lb/dall year001
Phenoldaily maximum≤ .5 lb/dall year001
Naphthalenemonthly average≤ .42 lb/dall year001
Naphthalenedaily maximum≤ 1.13 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 1.96 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 5.32 lb/dall year001
Di-n-butyl phthalatemonthly average≤ .51 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ 1.09 lb/dall year001
Vinyl chloridemonthly average≤ 1.98 lb/dall year001
Vinyl chloridedaily maximum≤ 5.11 lb/dall year001
Trichloroethylenemonthly average≤ .4 lb/dall year001
Trichloroethylenedaily maximum≤ 1.03 lb/dall year001
Hexachlorobenzenemonthly average≤ .25 lb/dall year001
Hexachlorobenzenedaily maximum≤ .53 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ 23.8 lb/dall year001
Chlorine, total residualdaily maximum≤ 39.1 lb/dall year001
1,3-Dichloropropylenemonthly average≤ .55 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ .84 lb/dall year001
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year001
pH range excursions, > 60 minutesmonthly total≤ 0 occur/moall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
Chloroethanemonthly average≤ 1.98 lb/dall year001
Chloroethanedaily maximum≤ 5.11 lb/dall year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexmonthly average minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all year001
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year001
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all year001
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexmonthly average minimumreport only (%)all year001
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute D. pulexmaximumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute Pimephales promelasmaximumreport only (%)all year001
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year002
Copper, total [as Cu]monthly averagereport only (mg/L)all year002
Copper, total [as Cu]daily maximumreport only (mg/L)all year002
Lead, total [as Pb]monthly averagereport only (mg/L)all year002
Lead, total [as Pb]daily maximumreport only (mg/L)all year002
Nickel, total [as Ni]monthly averagereport only (mg/L)all year002
Nickel, total [as Ni]daily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002

Cited limits by parameter: Louisiana's rules and the federal ones.

Same industry: the 130 Chemicals and Allied Products permits in Louisiana.

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Your permit document is the final word. As JSON: /api/v1/permits/LA0000281 · MCP: https://passage-data.com/mcp