Matheson Tri-Gas, Inc.

NPDES permit AL0081957 · Minor NON-POTW · effective, expires 2029-02-28 · 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 12 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 AL permits in EPA's filings — check your permit).

Limits in force (20)

OutfallParameterStatisticLimitMonths
001pHDAILY MN report only all year
001pHDAILY MX report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chemical Oxygen Demand [COD]DAILY MX report only all year
002pHDAILY MN report only all year
002pHDAILY MX report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chemical Oxygen Demand [COD]DAILY MX report only all year
003BOD, 5-day, 20 deg. CDAILY MX report only all year
003pHMINIMUM >= 6 SU all year
003pHDAILY MX <= 8.5 SU all year
003Solids, total suspendedDAILY MX <= 45 mg/L all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualDAILY MX report only 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