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Syngenta Crop Protection, LLC

Agricultural Chemicals, major discharger, St. Gabriel, Louisiana. NPDES permit LA0005487 expired Aug 31, 2024; its limits still apply. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (6 values), outfall 002 form Q quarterly (8 values), outfall 011 form Q quarterly (8 values), outfall 012 form A monthly (2 values), outfall 301 form A monthly (26 values), outfall 301 form Q quarterly (28 values), and 9 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 93 reports late

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

Period endingParameterReportedLimitOver by
June 2026Solids, total suspended, monthly average40 mg/L≤ 30 mg/L33%

Limits in force (223)

ParameterStatisticLimitMonthsOutfall
pHminimumreport only (SU)all year001
pHmaximumreport only (SU)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 #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 #248-hour 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 #2monthly average minimumreport only (pass=0;fail=1)all year001
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all 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 #348-hour 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 #3monthly average minimumreport only (pass=0;fail=1)all year001
Whole Effluent Toxicity - Retest #3monthly average 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≤ 466 minall year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexmonthly 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
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year001
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all year001
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexmonthly average minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all year001
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute D. pulex48-hour minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute D. pulexmonthly average minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all year001
Coef Of Var Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport 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
Chloride [as Cl]monthly averagereport only (mg/L)all year002
Chloride [as Cl]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
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year011
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year011
Solids, total suspendedmonthly average≤ 30 mg/Lall year011
Solids, total suspendeddaily maximum≤ 45 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
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year011
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year011
Oil & Greasedaily maximum≤ 15 mg/Lall year012
Oil & Greasedaily maximum≤ 15 mg/Lall year012
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year012
Carbon, tot organic [TOC]daily maximum≤ 50 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
pHinstantaneous minimum≥ 6 SUall year301
pHinstantaneous maximum≤ 9 SUall year301
Solids, total suspendedmonthly average≤ 2171 lb/dall year301
Solids, total suspendeddaily maximum≤ 6734 lb/dall year301
Nitrogen, ammonia total [as N]monthly average≤ 787 lb/dall year301
Nitrogen, ammonia total [as N]daily maximum≤ 1781 lb/dall year301
Phosphorus, total [as P]monthly averagereport only (lb/d)all year301
Phosphorus, total [as P]daily maximumreport only (lb/d)all year301
Carbon, tot organic [TOC]monthly average≤ 2519 lb/dall year301
Carbon, tot organic [TOC]daily maximum≤ 8827 lb/dall year301
Cyanide, total [as CN]monthly average≤ 59.29 lb/dall year301
Cyanide, total [as CN]daily maximum≤ 167.74 lb/dall year301
Cyanide, free [amenable to chlorination]monthly average≤ 5.23 lb/dall year301
Cyanide, free [amenable to chlorination]daily maximum≤ 24.88 lb/dall year301
Zinc, total [as Zn]monthly average≤ 5.98 lb/dall year301
Zinc, total [as Zn]daily maximum≤ 14.87 lb/dall year301
Carbon tetrachloridemonthly average≤ 2.21 lb/dall year301
Carbon tetrachloridedaily maximum≤ 5.92 lb/dall year301
1,2-Dichloroethanemonthly average≤ 2.8 lb/dall year301
1,2-Dichloroethanedaily maximum≤ 8.94 lb/dall year301
Bromoformmonthly average≤ 2.67 lb/dall year301
Bromoformdaily maximum≤ 10.81 lb/dall year301
Dibromochloromethanemonthly average≤ 2.67 lb/dall year301
Dibromochloromethanedaily maximum≤ 10.81 lb/dall year301
Chloroformmonthly average≤ 1.73 lb/dall year301
Chloroformdaily maximum≤ 5.06 lb/dall year301
Toluenemonthly average≤ .44 lb/dall year301
Toluenedaily maximum≤ 1.15 lb/dall year301
Benzenemonthly average≤ .89 lb/dall year301
Benzenedaily maximum≤ 2.09 lb/dall year301
Acenaphthylenemonthly average≤ .3 lb/dall year301
Acenaphthylenedaily maximum≤ .73 lb/dall year301
Acenaphthenemonthly average≤ .3 lb/dall year301
Acenaphthenedaily maximum≤ .73 lb/dall year301
Acrylonitrilemonthly average≤ 1.46 lb/dall year301
Acrylonitriledaily maximum≤ 3.61 lb/dall year301
Anthracenemonthly average≤ .3 lb/dall year301
Anthracenedaily maximum≤ .73 lb/dall year301
Benzo[b]fluoranthenemonthly average≤ .31 lb/dall year301
Benzo[b]fluoranthenedaily maximum≤ .75 lb/dall year301
Benzo[k]fluoranthenemonthly average≤ .3 lb/dall year301
Benzo[k]fluoranthenedaily maximum≤ .73 lb/dall year301
Benzo[a]pyrenemonthly average≤ .31 lb/dall year301
Benzo[a]pyrenedaily maximum≤ .75 lb/dall year301
Chlorobenzenemonthly average≤ 2.21 lb/dall year301
Chlorobenzenedaily maximum≤ 5.92 lb/dall year301
Chrysenemonthly average≤ .3 lb/dall year301
Chrysenedaily maximum≤ .73 lb/dall year301
Diethyl phthalatemonthly average≤ .72 lb/dall year301
Diethyl phthalatedaily maximum≤ 1.76 lb/dall year301
Dimethyl phthalatemonthly average≤ .3 lb/dall year301
Dimethyl phthalatedaily maximum≤ .73 lb/dall year301
Ethylbenzenemonthly average≤ 2.21 lb/dall year301
Ethylbenzenedaily maximum≤ 5.92 lb/dall year301
Fluoranthenemonthly average≤ .34 lb/dall year301
Fluoranthenedaily maximum≤ .84 lb/dall year301
Fluorenemonthly average≤ .3 lb/dall year301
Fluorenedaily maximum≤ .73 lb/dall year301
Hexachlorobutadienemonthly average≤ 2.21 lb/dall year301
Hexachlorobutadienedaily maximum≤ 5.92 lb/dall year301
Hexachloroethanemonthly average≤ 3.05 lb/dall year301
Hexachloroethanedaily maximum≤ 12.36 lb/dall year301
Methyl chloride [Chloromethane]monthly average≤ 1.71 lb/dall year301
Methyl chloride [Chloromethane]daily maximum≤ 4.59 lb/dall year301
Methylene chloridemonthly average≤ .56 lb/dall year301
Methylene chloridedaily maximum≤ 2.65 lb/dall year301
Nitrobenzenemonthly average≤ 34.83 lb/dall year301
Nitrobenzenedaily maximum≤ 99.68 lb/dall year301
Phenanthrenemonthly average≤ .3 lb/dall year301
Phenanthrenedaily maximum≤ .73 lb/dall year301
Pyrenemonthly average≤ .31 lb/dall year301
Pyrenedaily maximum≤ .75 lb/dall year301
Tetrachloroethylenemonthly average≤ .81 lb/dall year301
Tetrachloroethylenedaily maximum≤ 2.55 lb/dall year301
1,1-Dichloroethanemonthly average≤ .34 lb/dall year301
1,1-Dichloroethanedaily maximum≤ .92 lb/dall year301
1,1-Dichloroethylenemonthly average≤ .34 lb/dall year301
1,1-Dichloroethylenedaily maximum≤ .93 lb/dall year301
1,1,1-Trichloroethanemonthly average≤ .34 lb/dall year301
1,1,1-Trichloroethanedaily maximum≤ .92 lb/dall year301
1,1,2-Trichloroethanemonthly average≤ .5 lb/dall year301
1,1,2-Trichloroethanedaily maximum≤ 1.98 lb/dall year301
Benzo[a]anthracenemonthly average≤ .3 lb/dall year301
Benzo[a]anthracenedaily maximum≤ .73 lb/dall year301
1,2-Dichlorobenzenemonthly average≤ 3.05 lb/dall year301
1,2-Dichlorobenzenedaily maximum≤ 12.36 lb/dall year301
1,2-Dichloropropanemonthly average≤ 3.05 lb/dall year301
1,2-Dichloropropanedaily maximum≤ 12.36 lb/dall year301
trans-1,2-Dichloroethylenemonthly average≤ .39 lb/dall year301
trans-1,2-Dichloroethylenedaily maximum≤ 1.03 lb/dall year301
1,2,4-Trichlorobenzenemonthly average≤ 3.05 lb/dall year301
1,2,4-Trichlorobenzenedaily maximum≤ 12.36 lb/dall year301
1,3-Dichlorobenzenemonthly average≤ 2.21 lb/dall year301
1,3-Dichlorobenzenedaily maximum≤ 5.92 lb/dall year301
1,4-Dichlorobenzenemonthly average≤ 2.21 lb/dall year301
1,4-Dichlorobenzenedaily maximum≤ 5.92 lb/dall year301
2-Nitrophenolmonthly average≤ 1.01 lb/dall year301
2-Nitrophenoldaily maximum≤ 3.6 lb/dall year301
2,4-Dimethylphenolmonthly average≤ .3 lb/dall year301
2,4-Dimethylphenoldaily maximum≤ .73 lb/dall year301
2,4-Dinitrophenolmonthly average≤ 18.79 lb/dall year301
2,4-Dinitrophenoldaily maximum≤ 66.81 lb/dall year301
4-Nitrophenolmonthly average≤ 2.52 lb/dall year301
4-Nitrophenoldaily maximum≤ 8.97 lb/dall year301
4,6-Dinitro-o-cresolmonthly average≤ 1.21 lb/dall year301
4,6-Dinitro-o-cresoldaily maximum≤ 4.31 lb/dall year301
Phenolmonthly average≤ .3 lb/dall year301
Phenoldaily maximum≤ .73 lb/dall year301
Naphthalenemonthly average≤ .3 lb/dall year301
Naphthalenedaily maximum≤ .73 lb/dall year301
Bromomethanemonthly average≤ 1.93 lb/dall year301
Bromomethanedaily maximum≤ 5.18 lb/dall year301
Atrazinemonthly average≤ 1.1868 lb/dall year301
Atrazinedaily maximum≤ 3.5328 lb/dall year301
Simazinemonthly average≤ 1.1638 lb/dall year301
Simazinedaily maximum≤ 3.5512 lb/dall year301
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 1.48 lb/dall year301
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 4.02 lb/dall year301
Di-n-butyl phthalatemonthly average≤ .31 lb/dall year301
Di-n-butyl phthalatedaily maximum≤ .67 lb/dall year301
Vinyl chloridemonthly average≤ 1.51 lb/dall year301
Vinyl chloridedaily maximum≤ 2.68 lb/dall year301
Trichloroethylenemonthly average≤ .4 lb/dall year301
Trichloroethylenedaily maximum≤ 1.07 lb/dall year301
Hexachlorobenzenemonthly average≤ .405 lb/dall year301
Hexachlorobenzenedaily maximum≤ .964 lb/dall year301
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year301
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year301
Chlorine, total residualmonthly average≤ 12.7 lb/dall year301
Chlorine, total residualdaily maximum≤ 21.4 lb/dall year301
1,3-Dichloropropylenemonthly average≤ 3.05 lb/dall year301
1,3-Dichloropropylenedaily maximum≤ 12.36 lb/dall year301
Bromodichloromethanemonthly average≤ 1.93 lb/dall year301
Bromodichloromethanedaily maximum≤ 5.18 lb/dall year301
Norflurazonmonthly average≤ .0037 lb/dall year301
Norflurazondaily maximum≤ .0086 lb/dall year301
Propazinemonthly average≤ 1.1461 lb/dall year301
Propazinedaily maximum≤ 3.4972 lb/dall year301
Terbuthylazinemonthly average≤ 1.012 lb/dall year301
Terbuthylazinedaily maximum≤ 3.088 lb/dall year301
Organic pesticide chemicals [40 CFR455]monthly averagereport only (lb/d)all year301
Organic pesticide chemicals [40 CFR455]daily maximumreport only (lb/d)all year301
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1007 lb/dall year301
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 4481 lb/dall year301
Chloroethanemonthly average≤ 1.71 lb/dall year301
Chloroethanedaily maximum≤ 4.59 lb/dall year301
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year501
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year501
Solids, total suspendedmonthly average≤ 30 mg/Lall year501
Solids, total suspendeddaily maximum≤ 45 mg/Lall year501
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year501
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year501
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year501
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year501
Oil & Greasedaily maximum≤ 15 mg/Lall year601
Oil & Greasedaily maximum≤ 15 mg/Lall year601
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year601
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year601
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year601
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year601
pHinstantaneous minimum≥ 6 SUall year701
pHinstantaneous maximum≤ 9 SUall year701
Solids, total suspendeddaily maximum≤ 90 mg/Lall year701
Solids, total suspendeddaily maximum≤ 90 mg/Lall year701
Oil & Greasedaily maximum≤ 15 mg/Lall year701
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year701
Lead, total [as Pb]daily maximum≤ 50 ug/Lall year701
Benzenedaily maximum≤ 50 ug/Lall year701
BTEXdaily maximum≤ 250 ug/Lall year701
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year701
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year701

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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