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Air Liquide Large Industries US LP

Chemical Preparations, Hahnville, Louisiana. NPDES permit LA0122475, in force until Mar 31, 2029. 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 Q quarterly (6 values), outfall 002 form Q quarterly (6 values), outfall 003 form Q quarterly (6 values), outfall 501 form A quarterly (8 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (26)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Oil & Greasedaily maximum≤ 15 mg/Lall 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
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
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
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 year501
pHinstantaneous maximum≤ 9 SUall year501
Oil & Greasedaily maximum≤ 15 mg/Lall year501
Oil & Greasemonthly average≤ 5.434 lb/dall year501
Oil & Greasedaily maximum≤ 10.868 lb/dall year501
Carbon, tot organic [TOC]daily maximum≤ 50 mg/Lall year501
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/d)all year501
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/d)all year501

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/LA0122475 · MCP: https://passage-data.com/mcp