AIRGAS USA LLC DBA AIRGAS DRY ICE

NPDES permit MS0062570 · Minor NON-POTW · effective, expires 2030-05-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 6 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MS permits in EPA's filings — check your permit).

Limits in force (13)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Nitrogen, total [as N]SEMI AVG report only all year
001Nitrogen, total [as N]SX report only all year
001Nitrogen, ammonia total [as N]QRTR AVG <= 1 mg/L all year
001Nitrogen, ammonia total [as N]QB <= 1.5 mg/L all year
001Phosphorus, total [as P]SEMI AVG report only all year
001Phosphorus, total [as P]SX report only all year
001Flow, in conduit or thru treatment plantQRTR AVG <= .0033 MGD all year
001Flow, in conduit or thru treatment plantQB report only all year
001BOD, carbonaceous [5 day, 20 C]QRTR AVG <= 30 mg/L all year
001BOD, carbonaceous [5 day, 20 C]QB <= 45 mg/L all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states