MAVERICK TUBE CORPORATION

NPDES permit TX0034681 · Minor NON-POTW · effective, expires 2029-09-06 · 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

3values over a limit
0required values missing, on 0 form(s)
4of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Chloride [as Cl] (2), Solids, total dissolved (1).

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (31)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 95 deg F all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 467 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 584 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Oil & GreaseDAILY AV <= 35 lb/d all year
001Oil & GreaseDAILY MX <= 46.7 lb/d all year
001Chloride [as Cl]DAILY AV <= 235 mg/L all year
001Chloride [as Cl]DAILY MX <= 498 mg/L all year
001Copper, total [as Cu]DAILY AV <= .0226 lb/d all year
001Copper, total [as Cu]DAILY MX <= .0478 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= .28 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Solids, total dissolvedDAILY AV <= 886 mg/L all year
001Solids, total dissolvedDAILY MX <= 1875 mg/L all year
101pHMINIMUM >= 6 SU all year
101pHMAXIMUM <= 9 SU all year
101Solids, total suspendedDAILY AV report only all year
101Solids, total suspendedDAILY MX <= 1.44 lb/d all year
101Oil & GreaseDAILY AV report only all year
101Oil & GreaseDAILY MX <= .602 lb/d all year
101Chromium, total [as Cr]DAILY AV report only all year
101Chromium, total [as Cr]DAILY MX <= .024 lb/d all year
101Lead, total [as Pb]DAILY AV report only all year
101Lead, total [as Pb]DAILY MX <= .0108 lb/d all year
101Nickel, total [as Ni]DAILY AV report only all year
101Nickel, total [as Ni]DAILY MX <= .022 lb/d all year
101Zinc, total [as Zn]DAILY AV report only all year
101Zinc, total [as Zn]DAILY MX <= .0073 lb/d all year
101Flow, in conduit or thru treatment plantDAILY AV report only all year
101Flow, in conduit or thru treatment plantDAILY MX <= .004 MGD 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