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Stepan Company

Industrial Organic Chemicals, Lake Providence, Louisiana. NPDES permit LA0122882 expired Jun 30, 2023; its limits still apply. 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 quarterly (10 values), outfall 002 form A quarterly (9 values), outfall 003 form Q quarterly (6 values), outfall 101 form Q quarterly (11 values), outfall 001 form S twice a year
Last report on file
December 2025
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 24 of 34 reports late

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 34 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 92 mg/Lall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 49 mg/Lall year001
Solids, total suspendeddaily maximum≤ 159 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year001
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year002
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 100 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year002
Chlorine, total residualdaily maximum≤ .2 mg/Lall year002
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 (gal/d)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year003
pHinstantaneous minimum≥ 6 SUall year101
pHinstantaneous maximum≤ 9 SUall year101
Solids, total suspendeddaily maximum≤ 90 mg/Lall year101
Solids, total suspendeddaily maximum≤ 90 mg/Lall year101
Oil & Greasedaily maximum≤ 15 mg/Lall year101
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year101
Lead, total [as Pb]daily maximum≤ 50 ug/Lall year101
Benzenedaily maximum≤ 50 ug/Lall year101
BTEXdaily maximum≤ 250 ug/Lall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year101

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0122882 · MCP: https://passage-data.com/mcp