WEATHERFORD US LP

NPDES permit TX0089940 · Minor NON-POTW · effective, expires 2029-09-05 · 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

4values over a limit
0required values missing, on 0 form(s)
1of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: E. coli (4).

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 (33)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO MIN >= 6 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY AV <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 40 mg/L all year
001Solids, total suspendedDAILY AV <= 1.4 lb/d all year
001Solids, total suspendedDAILY MX <= 3.6 lb/d all year
001Oil & GreaseDAILY AV <= 15 mg/L all year
001Oil & GreaseDAILY MX <= 20 mg/L all year
001Oil & GreaseDAILY AV <= 1.35 lb/d all year
001Oil & GreaseDAILY MX <= 1.8 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 2 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY AV <= .18 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= .9 lb/d all year
001Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
001Carbon, tot organic [TOC]DAILY MX <= 6.75 lb/d all year
001Copper, total [as Cu]DAILY AV <= .0903 mg/L all year
001Copper, total [as Cu]DAILY MX <= .191 mg/L all year
001Copper, total [as Cu]DAILY AV <= .0081 lb/d all year
001Copper, total [as Cu]DAILY MX <= .017 lb/d all year
001Zinc, total [as Zn]DAILY AV <= .216 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .458 mg/L all year
001Flow, in conduit or thru treatment plantDAILY AV <= .0108 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= .0432 MGD all year
001Chlorine, total residualMO MIN >= 1 mg/L all year
001Chlorine, total residualMO MAX <= 4 mg/L all year
001E. coliDAILY AV <= 63 MPN/100mL all year
001E. coliDAILY MX <= 199 MPN/100mL all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= .9 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 2.2 lb/d 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