Passage Data · Check a report · Use it from your AI

Shell Chemical LP- Norco Chemical Plant- West Site

Industrial Organic Chemicals, major discharger, Norco, Louisiana. NPDES permit LA0005762 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last January 2026), 1 of 41 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (24 values), outfall 001 form Q quarterly (16 values), outfall 003 form Q quarterly (6 values), outfall 004 form Q quarterly (6 values), outfall 005 form Q quarterly (6 values), outfall 006 form Q quarterly (6 values), and 5 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 41 reports late

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

Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, daily maximum1242.9 lb/d≤ 615 lb/d102%
January 2026Solids, total suspended, monthly average432 lb/d≤ 203 lb/d113%

Limits in force (192)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 1588 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 3018 lb/dall year001
pHminimumreport only (SU)all year001
pHmaximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 203 lb/dall year001
Solids, total suspendeddaily maximum≤ 615 lb/dall year001
Oil & Greasemonthly average≤ 466 lb/dall year001
Oil & Greasedaily maximum≤ 873 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 684 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 1486 lb/dall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Carbon, tot organic [TOC]monthly average≤ 6704 lb/dall year001
Carbon, tot organic [TOC]daily maximum≤ 12590 lb/dall year001
Sulfide, total [as S]monthly average≤ 6 lb/dall year001
Sulfide, total [as S]daily maximum≤ 14 lb/dall year001
Copper, total [as Cu]monthly average≤ 30.23 lb/dall year001
Copper, total [as Cu]daily maximum≤ 70.47 lb/dall year001
Zinc, total [as Zn]monthly average≤ 21.89 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 54.42 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≤ .08 lb/dall year001
Carbon tetrachloridedaily maximum≤ .16 lb/dall year001
1,2-Dichloroethanemonthly average≤ .29 lb/dall year001
1,2-Dichloroethanedaily maximum≤ .9 lb/dall year001
Chloroformmonthly average≤ .09 lb/dall year001
Chloroformdaily maximum≤ .2 lb/dall year001
Phenolics, total recoverablemonthly average≤ 11 lb/dall year001
Phenolics, total recoverabledaily maximum≤ 21 lb/dall year001
Toluenemonthly average≤ .11 lb/dall year001
Toluenedaily maximum≤ .34 lb/dall year001
Benzenemonthly average≤ .16 lb/dall year001
Benzenedaily maximum≤ .58 lb/dall year001
Acenaphthylenemonthly average≤ .09 lb/dall year001
Acenaphthylenedaily maximum≤ .25 lb/dall year001
Acenaphthenemonthly average≤ .09 lb/dall year001
Acenaphthenedaily maximum≤ .25 lb/dall year001
Acrylonitrilemonthly average≤ .41 lb/dall year001
Acrylonitriledaily maximum≤ 1.04 lb/dall year001
Anthracenemonthly average≤ .09 lb/dall year001
Anthracenedaily maximum≤ .25 lb/dall year001
Benzo[b]fluoranthenemonthly average≤ .1 lb/dall year001
Benzo[b]fluoranthenedaily maximum≤ .26 lb/dall year001
Benzo[k]fluoranthenemonthly average≤ .09 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ .25 lb/dall year001
Benzo[a]pyrenemonthly average≤ .1 lb/dall year001
Benzo[a]pyrenedaily maximum≤ .26 lb/dall year001
Chlorobenzenemonthly average≤ .06 lb/dall year001
Chlorobenzenedaily maximum≤ .12 lb/dall year001
Chrysenemonthly average≤ .09 lb/dall year001
Chrysenedaily maximum≤ .25 lb/dall year001
Diethyl phthalatemonthly average≤ .35 lb/dall year001
Diethyl phthalatedaily maximum≤ .87 lb/dall year001
Dimethyl phthalatemonthly average≤ .08 lb/dall year001
Dimethyl phthalatedaily maximum≤ .2 lb/dall year001
Ethylbenzenemonthly average≤ .14 lb/dall year001
Ethylbenzenedaily maximum≤ .46 lb/dall year001
Fluoranthenemonthly average≤ .11 lb/dall year001
Fluoranthenedaily maximum≤ .29 lb/dall year001
Fluorenemonthly average≤ .09 lb/dall year001
Fluorenedaily maximum≤ .25 lb/dall year001
Hexachlorobutadienemonthly average≤ .09 lb/dall year001
Hexachlorobutadienedaily maximum≤ .21 lb/dall year001
Hexachloroethanemonthly average≤ .09 lb/dall year001
Hexachloroethanedaily maximum≤ .23 lb/dall year001
Methyl chloride [Chloromethane]monthly average≤ .37 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ .81 lb/dall year001
Methylene chloridemonthly average≤ .17 lb/dall year001
Methylene chloridedaily maximum≤ .38 lb/dall year001
Nitrobenzenemonthly average≤ .12 lb/dall year001
Nitrobenzenedaily maximum≤ .29 lb/dall year001
Phenanthrenemonthly average≤ .09 lb/dall year001
Phenanthrenedaily maximum≤ .25 lb/dall year001
Pyrenemonthly average≤ .11 lb/dall year001
Pyrenedaily maximum≤ .29 lb/dall year001
Tetrachloroethylenemonthly average≤ .09 lb/dall year001
Tetrachloroethylenedaily maximum≤ .24 lb/dall year001
1,1-Dichloroethanemonthly average≤ .09 lb/dall year001
1,1-Dichloroethanedaily maximum≤ .25 lb/dall year001
1,1-Dichloroethylenemonthly average≤ .07 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ .11 lb/dall year001
1,1,1-Trichloroethanemonthly average≤ .09 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ .23 lb/dall year001
1,1,2-Trichloroethanemonthly average≤ .09 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ .23 lb/dall year001
Benzo[a]anthracenemonthly average≤ .09 lb/dall year001
Benzo[a]anthracenedaily maximum≤ .25 lb/dall year001
1,2-Dichlorobenzenemonthly average≤ .33 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ .7 lb/dall year001
1,2-Dichloropropanemonthly average≤ .65 lb/dall year001
1,2-Dichloropropanedaily maximum≤ .98 lb/dall year001
trans-1,2-Dichloroethylenemonthly average≤ .09 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ .23 lb/dall year001
1,2,4-Trichlorobenzenemonthly average≤ .29 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ .6 lb/dall year001
1,3-Dichlorobenzenemonthly average≤ .13 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ .19 lb/dall year001
1,4-Dichlorobenzenemonthly average≤ .06 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ .12 lb/dall year001
2-Chlorophenolmonthly average≤ .13 lb/dall year001
2-Chlorophenoldaily maximum≤ .42 lb/dall year001
2-Nitrophenolmonthly average≤ .18 lb/dall year001
2-Nitrophenoldaily maximum≤ .3 lb/dall year001
2,4-Dichlorophenolmonthly average≤ .17 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ .48 lb/dall year001
2,4-Dimethylphenolmonthly average≤ .08 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ .15 lb/dall year001
2,4-Dinitrotoluenemonthly average≤ .48 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ 1.22 lb/dall year001
2,4-Dinitrophenolmonthly average≤ .3 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ .53 lb/dall year001
2,6-Dinitrotoluenemonthly average≤ 1.09 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ 2.74 lb/dall year001
4-Nitrophenolmonthly average≤ .31 lb/dall year001
4-Nitrophenoldaily maximum≤ .53 lb/dall year001
4,6-Dinitro-o-cresolmonthly average≤ .33 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ 1.19 lb/dall year001
Phenolmonthly average≤ .06 lb/dall year001
Phenoldaily maximum≤ .11 lb/dall year001
Naphthalenemonthly average≤ .09 lb/dall year001
Naphthalenedaily maximum≤ .25 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .44 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 1.19 lb/dall year001
Di-n-butyl phthalatemonthly average≤ .12 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ .24 lb/dall year001
Vinyl chloridemonthly average≤ .44 lb/dall year001
Vinyl chloridedaily maximum≤ 1.15 lb/dall year001
Trichloroethylenemonthly average≤ .09 lb/dall year001
Trichloroethylenedaily maximum≤ .23 lb/dall year001
Hexachlorobenzenemonthly average≤ .06 lb/dall year001
Hexachlorobenzenedaily maximum≤ .12 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≤ .12 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ .19 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≤ .44 lb/dall year001
Chloroethanedaily maximum≤ 1.15 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 year003
pHinstantaneous maximum≤ 9 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
pHinstantaneous minimum≥ 6 SUall year004
pHinstantaneous maximum≤ 9 SUall year004
Oil & Greasedaily maximum≤ 15 mg/Lall year004
Carbon, tot organic [TOC]daily maximum≤ 50 mg/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
pHinstantaneous minimum≥ 6 SUall year005
pHinstantaneous maximum≤ 9 SUall year005
Oil & Greasedaily maximum≤ 15 mg/Lall year005
Carbon, tot organic [TOC]daily maximum≤ 50 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
pHinstantaneous minimum≥ 6 SUall year006
pHinstantaneous maximum≤ 9 SUall year006
Oil & Greasedaily maximum≤ 15 mg/Lall year006
Carbon, tot organic [TOC]daily maximum≤ 50 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
pHinstantaneous minimum≥ 6 SUall year007
pHinstantaneous maximum≤ 9 SUall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Carbon, tot organic [TOC]daily maximum≤ 50 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

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

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

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0005762 · MCP: https://passage-data.com/mcp