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Airgas USA LLC Dba Airgas Dry Ice

Industrial Gases, Star, Mississippi. NPDES permit MS0062570, in force until May 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (9 values), form S twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (13)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Nitrogen, total [as N]semi-annual averagereport only (lb/d)all year
Nitrogen, total [as N]semi-annual maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]quarterly average≤ 1 mg/Lall year
Nitrogen, ammonia total [as N]quarterly maximum≤ 1.5 mg/Lall year
Phosphorus, total [as P]semi-annual averagereport only (lb/d)all year
Phosphorus, total [as P]semi-annual maximumreport only (lb/d)all year
Flow, in conduit or thru treatment plantquarterly average≤ .0033 MGDall year
Flow, in conduit or thru treatment plantquarterly maximumreport only (MGD)all year
BOD, carbonaceous [5 day, 20 C]quarterly average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]quarterly maximum≤ 45 mg/Lall year

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/MS0062570 · MCP: https://passage-data.com/mcp