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Airgas Carbonic Inc, Star Plant

Industrial Gases, Star, Mississippi. NPDES permit MS0060542 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 4 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Y yearly
Last report on file
December 2025
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 1 report late

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

Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, annual average.39 lb/d≤ .38 lb/d3%
December 2025BOD, 5-day, 20 deg. C, annual average33 mg/L≤ 30 mg/L10%
December 2025BOD, 5-day, 20 deg. C, daily maximum.72 lb/d≤ .56 lb/d29%
December 2025BOD, 5-day, 20 deg. C, daily maximum48 mg/L≤ 45 mg/L7%

Limits in force (16)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cannual average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cannual average≤ .38 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ .56 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedannual average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedannual average≤ .38 lb/dall year
Solids, total suspendeddaily maximum≤ .56 lb/dall year
Flow, in conduit or thru treatment plantannual average≤ .0015 MGDall year
Flow, in conduit or thru treatment plantannual maximumreport only (MGD)all year
Chlorine, total residualminimum≥ .1 mg/Lall year
Chlorine, total residualmaximum≤ 1 mg/Lall year
E. coliannual average≤ 126 #/100mLall year
E. colidaily maximum≤ 410 #/100mLall year

How strict are these limits?

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

Same industry: the 23 Chemicals and Allied Products permits in Mississippi.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0060542 · MCP: https://passage-data.com/mcp