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Linde Inc.

Industrial Gases, Decatur, Alabama. NPDES permit AL0072044, in force until May 31, 2031. 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, outfall 01A form 1 quarterly, outfall 01A form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 1 of 20 reports late

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
pHdaily minimumreport only (SU)all year001
pHdaily maximumreport only (SU)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Quarterly Certification Statementdaily maximum≤ 0 Y=0;N=1all year001
Temperature, water deg. fahrenheitdaily maximum≤ 86 deg Fall year01A
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year01A
pHdaily minimum≥ 6 SUall year01A
pHdaily minimum≥ 6 SUall year01A
pHdaily maximum≤ 8.5 SUall year01A
pHdaily maximum≤ 8.5 SUall year01A
Solids, total suspendeddaily maximumreport only (mg/L)all year01A
Oil & Greasedaily maximum≤ 15 mg/Lall year01A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year01A
Phosphorus, total [as P]daily maximumreport only (mg/L)all year01A
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year01A
Copper, total recoverablemonthly average≤ .0389 mg/Lall year01A
Copper, total recoverabledaily maximum≤ .0584 mg/Lall year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Chlorine, total residualmonthly average≤ .011 mg/Lall year01A
Chlorine, total residualdaily maximum≤ .019 mg/Lall year01A
Cyanide, free availablemonthly average≤ .0052 mg/Lall year01A
Cyanide, free availabledaily maximum≤ .022 mg/Lall year01A

How strict are these limits?

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

Same industry: the 79 Chemicals and Allied Products permits in Alabama.

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AL0072044 · MCP: https://passage-data.com/mcp