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Methanex USA Services, LLC

Industrial Organic Chemicals, major discharger, Geismar, Louisiana. NPDES permit LA0126756 expired Oct 31, 2025; its limits still apply. Last 12 months: no values over a limit, 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (16 values), outfall 002 form Q quarterly (4 values), outfall 003 form Q quarterly (6 values), outfall 004 form Q quarterly (11 values), outfall 005 form Q quarterly (6 values), outfall 006 form Q quarterly (6 values), and 10 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 64 reports late

Limits in force (213)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 262 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 693 lb/dall year001
pHminimumreport only (SU)all year001
pHmaximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 400 lb/dall year001
Solids, total suspendeddaily maximum≤ 1287 lb/dall year001
Copper, total [as Cu]monthly average≤ 11 lb/dall year001
Copper, total [as Cu]daily maximum≤ 24 lb/dall year001
Nickel, total [as Ni]monthly average≤ 12 lb/dall year001
Nickel, total [as Ni]daily maximum≤ 29 lb/dall year001
Zinc, total [as Zn]monthly average≤ 8 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 19 lb/dall year001
Carbon tetrachloridemonthly average≤ .13 lb/dall year001
Carbon tetrachloridedaily maximum≤ .27 lb/dall year001
1,2-Dichloroethanemonthly average≤ .49 lb/dall year001
1,2-Dichloroethanedaily maximum≤ 1.52 lb/dall year001
Chloroformmonthly average≤ .15 lb/dall year001
Chloroformdaily maximum≤ .33 lb/dall year001
Toluenemonthly average≤ .19 lb/dall year001
Toluenedaily maximum≤ .58 lb/dall year001
Benzenemonthly average≤ .27 lb/dall year001
Benzenedaily maximum≤ .98 lb/dall year001
Acenaphthylenemonthly average≤ .16 lb/dall year001
Acenaphthylenedaily maximum≤ .43 lb/dall year001
Acenaphthenemonthly average≤ .16 lb/dall year001
Acenaphthenedaily maximum≤ .43 lb/dall year001
Acrylonitrilemonthly average≤ .69 lb/dall year001
Acrylonitriledaily maximum≤ 1.75 lb/dall year001
Anthracenemonthly average≤ .16 lb/dall year001
Anthracenedaily maximum≤ .43 lb/dall year001
Benzo[b]fluoranthenemonthly average≤ .17 lb/dall year001
Benzo[b]fluoranthenedaily maximum≤ .44 lb/dall year001
Benzo[k]fluoranthenemonthly average≤ .16 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ .43 lb/dall year001
Benzo[a]pyrenemonthly average≤ .17 lb/dall year001
Benzo[a]pyrenedaily maximum≤ .44 lb/dall year001
Chlorobenzenemonthly average≤ .11 lb/dall year001
Chlorobenzenedaily maximum≤ .2 lb/dall year001
Chrysenemonthly average≤ .16 lb/dall year001
Chrysenedaily maximum≤ .43 lb/dall year001
Diethyl phthalatemonthly average≤ .58 lb/dall year001
Diethyl phthalatedaily maximum≤ 1.46 lb/dall year001
Dimethyl phthalatemonthly average≤ .14 lb/dall year001
Dimethyl phthalatedaily maximum≤ .34 lb/dall year001
Ethylbenzenemonthly average≤ .23 lb/dall year001
Ethylbenzenedaily maximum≤ .78 lb/dall year001
Fluoranthenemonthly average≤ .18 lb/dall year001
Fluoranthenedaily maximum≤ .49 lb/dall year001
Fluorenemonthly average≤ .16 lb/dall year001
Fluorenedaily maximum≤ .43 lb/dall year001
Hexachlorobutadienemonthly average≤ .14 lb/dall year001
Hexachlorobutadienedaily maximum≤ .35 lb/dall year001
Hexachloroethanemonthly average≤ .15 lb/dall year001
Hexachloroethanedaily maximum≤ .39 lb/dall year001
Methyl chloride [Chloromethane]monthly average≤ .62 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ 1.37 lb/dall year001
Methylene chloridemonthly average≤ .29 lb/dall year001
Methylene chloridedaily maximum≤ .64 lb/dall year001
Nitrobenzenemonthly average≤ .19 lb/dall year001
Nitrobenzenedaily maximum≤ .49 lb/dall year001
Phenanthrenemonthly average≤ .16 lb/dall year001
Phenanthrenedaily maximum≤ .43 lb/dall year001
Pyrenemonthly average≤ .18 lb/dall year001
Pyrenedaily maximum≤ .48 lb/dall year001
Tetrachloroethylenemonthly average≤ .16 lb/dall year001
Tetrachloroethylenedaily maximum≤ .4 lb/dall year001
1,1-Dichloroethanemonthly average≤ .16 lb/dall year001
1,1-Dichloroethanedaily maximum≤ .43 lb/dall year001
1,1-Dichloroethylenemonthly average≤ .12 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ .18 lb/dall year001
1,1,1-Trichloroethanemonthly average≤ .15 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ .39 lb/dall year001
1,1,2-Trichloroethanemonthly average≤ .15 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ .39 lb/dall year001
Benzo[a]anthracenemonthly average≤ .16 lb/dall year001
Benzo[a]anthracenedaily maximum≤ .43 lb/dall year001
1,2-Dichlorobenzenemonthly average≤ .56 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ 1.18 lb/dall year001
1,2-Dichloropropanemonthly average≤ 1.1 lb/dall year001
1,2-Dichloropropanedaily maximum≤ 1.66 lb/dall year001
trans-1,2-Dichloroethylenemonthly average≤ .15 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ .39 lb/dall year001
1,2,4-Trichlorobenzenemonthly average≤ .49 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ 1.01 lb/dall year001
1,3-Dichlorobenzenemonthly average≤ .22 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ .32 lb/dall year001
1,4-Dichlorobenzenemonthly average≤ .11 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ .2 lb/dall year001
2-Chlorophenolmonthly average≤ .22 lb/dall year001
2-Chlorophenoldaily maximum≤ .71 lb/dall year001
2-Nitrophenolmonthly average≤ .3 lb/dall year001
2-Nitrophenoldaily maximum≤ .5 lb/dall year001
2,4-Dichlorophenolmonthly average≤ .28 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ .81 lb/dall year001
2,4-Dimethylphenolmonthly average≤ .13 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ .26 lb/dall year001
2,4-Dinitrotoluenemonthly average≤ .82 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ 2.06 lb/dall year001
2,4-Dinitrophenolmonthly average≤ .51 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ .89 lb/dall year001
2,6-Dinitrotoluenemonthly average≤ 1.84 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ 4.62 lb/dall year001
4-Nitrophenolmonthly average≤ .52 lb/dall year001
4-Nitrophenoldaily maximum≤ .89 lb/dall year001
4,6-Dinitro-o-cresolmonthly average≤ .56 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ 2 lb/dall year001
Phenolmonthly average≤ .11 lb/dall year001
Phenoldaily maximum≤ .19 lb/dall year001
Naphthalenemonthly average≤ .16 lb/dall year001
Naphthalenedaily maximum≤ .43 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .74 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 2.01 lb/dall year001
Di-n-butyl phthalatemonthly average≤ .19 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ .41 lb/dall year001
Vinyl chloridemonthly average≤ .75 lb/dall year001
Vinyl chloridedaily maximum≤ 1.93 lb/dall year001
Trichloroethylenemonthly average≤ .15 lb/dall year001
Trichloroethylenedaily maximum≤ .39 lb/dall year001
Hexachlorobenzenemonthly average≤ .09 lb/dall year001
Hexachlorobenzenedaily maximum≤ .2 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
1,3-Dichloropropylenemonthly average≤ .21 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ .32 lb/dall year001
pH range excursions, > 60 minutesmonthly total≤ 0 occur/moall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
Chloroethanemonthly average≤ .75 lb/dall year001
Chloroethanedaily maximum≤ 1.93 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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year002
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year002
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year003
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Oil & Greasedaily maximum≤ 15 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
pHinstantaneous minimum≥ 6 SUall year004
pHinstantaneous maximum≤ 9 SUall year004
Solids, total suspendeddaily maximum≤ 90 mg/Lall year004
Solids, total suspendeddaily maximum≤ 90 mg/Lall year004
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year004
Lead, total [as Pb]daily maximum≤ 50 ug/Lall year004
Oil and greasedaily maximum≤ 15 mL/Lall year004
Benzenedaily maximum≤ 50 ug/Lall year004
BTEXdaily maximum≤ 250 ug/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year005
pHinstantaneous minimum≥ 6 SUall year005
pHinstantaneous maximum≤ 9 SUall year005
Oil & Greasedaily maximum≤ 15 mg/Lall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year006
pHinstantaneous minimum≥ 6 SUall year006
pHinstantaneous maximum≤ 9 SUall year006
Oil & Greasedaily maximum≤ 15 mg/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year007
pHinstantaneous minimum≥ 6 SUall year007
pHinstantaneous maximum≤ 9 SUall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year008
pHinstantaneous minimum≥ 6 SUall year008
pHinstantaneous maximum≤ 9 SUall year008
Oil & Greasedaily maximum≤ 15 mg/Lall year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
pHinstantaneous minimum≥ 6 SUall year009
pHinstantaneous maximum≤ 9 SUall year009
Oil & Greasedaily maximum≤ 15 mg/Lall year009
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year009
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year009
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year009
pHinstantaneous minimum≥ 6 SUall year010
pHinstantaneous maximum≤ 9 SUall year010
Oil & Greasedaily maximum≤ 15 mg/Lall year010
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year010
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
pHinstantaneous minimum≥ 6 SUall year011
pHinstantaneous maximum≤ 9 SUall year011
Oil & Greasedaily maximum≤ 15 mg/Lall year011
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year011
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year011
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year011
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year012
pHinstantaneous minimum≥ 6 SUall year012
pHinstantaneous maximum≤ 9 SUall year012
Oil & Greasedaily maximum≤ 15 mg/Lall year012
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year012
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year012
Oxygen demand, chem. [high level] [COD]daily maximum≤ 125 mg/Lall year013
pHinstantaneous minimum≥ 6 SUall year013
pHinstantaneous maximum≤ 9 SUall year013
Oil & Greasedaily maximum≤ 15 mg/Lall year013
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year013
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year013

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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