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Americas Styrenics, LLC- St. James Plant

Industrial Organic Chemicals, major discharger, St. James, Louisiana. NPDES permit LA0029963 expired Oct 31, 2023; its limits still apply. Last 12 months: over a limit 3 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (6 values), outfall 002 form A monthly (6 values), outfall 002 form Q quarterly (4 values), outfall 003 form Q quarterly (10 values), outfall 005 form A monthly (2 values), outfall 101 form A monthly (14 values), and 7 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 4 required values missing, 1 of 72 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
December 2025002Oil & Grease, daily maximum34.4 mg/L≤ 15 mg/L129%
March 2026202Solids, total suspended, daily maximum94 mg/L≤ 45 mg/L109%
March 2026202Solids, total suspended, monthly average61 mg/L≤ 30 mg/L103%

Limits in force (192)

ParameterStatisticLimitMonthsOutfall
pHminimumreport only (SU)all year001
pHmaximumreport only (SU)all 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
Hexachlorobenzenemonthly average≤ .5739 lb/dall year001
Hexachlorobenzenedaily maximum≤ 1.3658 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
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
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≤ 10 SUall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall 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
Nitrogen, Total As Nmonthly averagereport only (mg/L)all year002
Nitrogen, Total As Ndaily maximumreport only (mg/L)all year002
Phosphorus, Total As Pmonthly averagereport only (mg/L)all year002
Phosphorus, Total As Pdaily maximumreport only (mg/L)all year002
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 10 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Nitrogen, Total As Nmonthly averagereport only (mg/L)all year003
Nitrogen, Total As Ndaily maximumreport only (mg/L)all year003
Phosphorus, Total As Pmonthly averagereport only (mg/L)all year003
Phosphorus, Total As Pdaily maximumreport only (mg/L)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
BOD, 5-day, 20 deg. Cmonthly average≤ 74 lb/dall year101
BOD, 5-day, 20 deg. Cdaily maximum≤ 197 lb/dall year101
pHinstantaneous minimum≥ 6 SUall year101
pHinstantaneous maximum≤ 9 SUall year101
Solids, total suspendedmonthly average≤ 114 lb/dall year101
Solids, total suspendeddaily maximum≤ 368 lb/dall year101
Chromium, total [as Cr]monthly average≤ 2.74 lb/dall year101
Chromium, total [as Cr]daily maximum≤ 6.84 lb/dall year101
Copper, total [as Cu]monthly average≤ 3.58 lb/dall year101
Copper, total [as Cu]daily maximum≤ 8.34 lb/dall year101
Zinc, total [as Zn]monthly average≤ 2.59 lb/dall year101
Zinc, total [as Zn]daily maximum≤ 6.44 lb/dall year101
Carbon tetrachloridemonthly average≤ .35 lb/dall year101
Carbon tetrachloridedaily maximum≤ .94 lb/dall year101
1,2-Dichloroethanemonthly average≤ .44 lb/dall year101
1,2-Dichloroethanedaily maximum≤ 1.42 lb/dall year101
Chloroformmonthly average≤ .27 lb/dall year101
Chloroformdaily maximum≤ .8 lb/dall year101
Toluenemonthly average≤ .07 lb/dall year101
Toluenedaily maximum≤ .18 lb/dall year101
Benzenemonthly average≤ .14 lb/dall year101
Benzenedaily maximum≤ .33 lb/dall year101
Acenaphthylenemonthly average≤ .05 lb/dall year101
Acenaphthylenedaily maximum≤ .12 lb/dall year101
Acenaphthenemonthly average≤ .05 lb/dall year101
Acenaphthenedaily maximum≤ .12 lb/dall year101
Acrylonitrilemonthly average≤ .23 lb/dall year101
Acrylonitriledaily maximum≤ .57 lb/dall year101
Anthracenemonthly average≤ .05 lb/dall year101
Anthracenedaily maximum≤ .12 lb/dall year101
Benzo[b]fluoranthenemonthly average≤ .05 lb/dall year101
Benzo[b]fluoranthenedaily maximum≤ .12 lb/dall year101
Benzo[k]fluoranthenemonthly average≤ .05 lb/dall year101
Benzo[k]fluoranthenedaily maximum≤ .12 lb/dall year101
Benzo[a]pyrenemonthly average≤ .05 lb/dall year101
Benzo[a]pyrenedaily maximum≤ .12 lb/dall year101
Chlorobenzenemonthly average≤ .35 lb/dall year101
Chlorobenzenedaily maximum≤ .94 lb/dall year101
Chrysenemonthly average≤ .05 lb/dall year101
Chrysenedaily maximum≤ .12 lb/dall year101
Diethyl phthalatemonthly average≤ .11 lb/dall year101
Diethyl phthalatedaily maximum≤ .28 lb/dall year101
Dimethyl phthalatemonthly average≤ .05 lb/dall year101
Dimethyl phthalatedaily maximum≤ .12 lb/dall year101
Ethylbenzenemonthly average≤ .35 lb/dall year101
Ethylbenzenedaily maximum≤ .94 lb/dall year101
Fluoranthenemonthly average≤ .05 lb/dall year101
Fluoranthenedaily maximum≤ .13 lb/dall year101
Fluorenemonthly average≤ .05 lb/dall year101
Fluorenedaily maximum≤ .12 lb/dall year101
Hexachlorobutadienemonthly average≤ .35 lb/dall year101
Hexachlorobutadienedaily maximum≤ .94 lb/dall year101
Hexachloroethanemonthly average≤ .48 lb/dall year101
Hexachloroethanedaily maximum≤ 1.96 lb/dall year101
Methyl chloride [Chloromethane]monthly average≤ .27 lb/dall year101
Methyl chloride [Chloromethane]daily maximum≤ .73 lb/dall year101
Methylene chloridemonthly average≤ .09 lb/dall year101
Methylene chloridedaily maximum≤ .42 lb/dall year101
Nitrobenzenemonthly average≤ 5.52 lb/dall year101
Nitrobenzenedaily maximum≤ 15.8 lb/dall year101
Phenanthrenemonthly average≤ .05 lb/dall year101
Phenanthrenedaily maximum≤ .12 lb/dall year101
Pyrenemonthly average≤ .05 lb/dall year101
Pyrenedaily maximum≤ .12 lb/dall year101
Tetrachloroethylenemonthly average≤ .13 lb/dall year101
Tetrachloroethylenedaily maximum≤ .4 lb/dall year101
1,1-Dichloroethanemonthly average≤ .05 lb/dall year101
1,1-Dichloroethanedaily maximum≤ .15 lb/dall year101
1,1-Dichloroethylenemonthly average≤ .05 lb/dall year101
1,1-Dichloroethylenedaily maximum≤ .15 lb/dall year101
1,1,1-Trichloroethanemonthly average≤ .05 lb/dall year101
1,1,1-Trichloroethanedaily maximum≤ .15 lb/dall year101
1,1,2-Trichloroethanemonthly average≤ .08 lb/dall year101
1,1,2-Trichloroethanedaily maximum≤ .31 lb/dall year101
Benzo[a]anthracenemonthly average≤ .05 lb/dall year101
Benzo[a]anthracenedaily maximum≤ .12 lb/dall year101
1,2-Dichlorobenzenemonthly average≤ .48 lb/dall year101
1,2-Dichlorobenzenedaily maximum≤ 1.96 lb/dall year101
1,2-Dichloropropanemonthly average≤ .48 lb/dall year101
1,2-Dichloropropanedaily maximum≤ 1.96 lb/dall year101
trans-1,2-Dichloroethylenemonthly average≤ .06 lb/dall year101
trans-1,2-Dichloroethylenedaily maximum≤ .16 lb/dall year101
1,2,4-Trichlorobenzenemonthly average≤ .48 lb/dall year101
1,2,4-Trichlorobenzenedaily maximum≤ 1.96 lb/dall year101
1,3-Dichlorobenzenemonthly average≤ .35 lb/dall year101
1,3-Dichlorobenzenedaily maximum≤ .94 lb/dall year101
1,4-Dichlorobenzenemonthly average≤ .35 lb/dall year101
1,4-Dichlorobenzenedaily maximum≤ .94 lb/dall year101
2-Nitrophenolmonthly average≤ .16 lb/dall year101
2-Nitrophenoldaily maximum≤ .57 lb/dall year101
2,4-Dimethylphenolmonthly average≤ .05 lb/dall year101
2,4-Dimethylphenoldaily maximum≤ .12 lb/dall year101
2,4-Dinitrophenolmonthly average≤ 2.98 lb/dall year101
2,4-Dinitrophenoldaily maximum≤ 10.59 lb/dall year101
4-Nitrophenolmonthly average≤ .4 lb/dall year101
4-Nitrophenoldaily maximum≤ 1.42 lb/dall year101
4,6-Dinitro-o-cresolmonthly average≤ .19 lb/dall year101
4,6-Dinitro-o-cresoldaily maximum≤ .68 lb/dall year101
Phenolmonthly average≤ .05 lb/dall year101
Phenoldaily maximum≤ .12 lb/dall year101
Naphthalenemonthly average≤ .05 lb/dall year101
Naphthalenedaily maximum≤ .12 lb/dall year101
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .23 lb/dall year101
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ .64 lb/dall year101
Di-n-butyl phthalatemonthly average≤ .05 lb/dall year101
Di-n-butyl phthalatedaily maximum≤ .11 lb/dall year101
Vinyl chloridemonthly average≤ .24 lb/dall year101
Vinyl chloridedaily maximum≤ .42 lb/dall year101
Trichloroethylenemonthly average≤ .06 lb/dall year101
Trichloroethylenedaily maximum≤ .17 lb/dall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
1,3-Dichloropropenemonthly average≤ .48 lb/dall year101
1,3-Dichloropropenedaily maximum≤ 1.96 lb/dall year101
Chloroethanemonthly average≤ .27 lb/dall year101
Chloroethanedaily maximum≤ .73 lb/dall year101
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year202
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year202
Solids, total suspendedmonthly average≤ 30 mg/Lall year202
Solids, total suspendeddaily maximum≤ 45 mg/Lall year202
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year202
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year202
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year202
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year202
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year203
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year203
Solids, total suspendedmonthly average≤ 30 mg/Lall year203
Solids, total suspendeddaily maximum≤ 45 mg/Lall year203
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year203
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year203
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year203
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year203
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year303
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year303
Solids, total suspendedmonthly average≤ 30 mg/Lall year303
Solids, total suspendeddaily maximum≤ 45 mg/Lall year303
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year303
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year303
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year303
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year303

How strict are these limits?

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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