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American Carbonyl LLC

Industrial Inorganic Chemicals, Huntsville, Alabama. NPDES permit AL0000345, in force until Dec 31, 2026. 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 (3 values), outfall 002 form 1 monthly (4 values), outfall 003 form Q quarterly (3 values), outfall 001 form S twice a year, outfall 003 form S twice a year
Renewal application due
Jul 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 0 of 24 reports late

Limits in force (22)

ParameterStatisticLimitMonthsOutfall
pHdaily minimumreport only (SU)all year001
pHdaily maximumreport only (SU)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Oil & Greasemaximum≤ 15 mg/Lall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year001
Iron, total recoverabledaily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all year001
Temperature, water deg. fahrenheitdaily maximum≤ 100 deg Fall year002
pHdaily minimum≥ 6 SUall year002
pHdaily maximum≤ 8.5 SUall year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
pHdaily minimumreport only (SU)all year003
pHdaily maximumreport only (SU)all year003
Solids, total suspendeddaily maximumreport only (mg/L)all year003
Oil & Greasemaximum≤ 15 mg/Lall year003
Nitrogen, total [as N]daily maximumreport only (mg/L)all year003
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year003
Iron, total recoverabledaily maximumreport only (mg/L)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all year003

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/AL0000345 · MCP: https://passage-data.com/mcp