ALCOA WORLD ALUMINA LLC

NPDES permit TX0004715 · Major NON-POTW · effective, expires 2027-01-13 · 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

2values over a limit
0required values missing, on 0 form(s)
0of 197 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (1), pH range excursions, > 60 minutes (1).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (223)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Flow, in conduit or thru treatment plantDAILY AV <= 62 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 72 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Mercury, total [as Hg]DAILY MX <= .004 mg/L all year
001Mercury, total [as Hg]DAILY AV <= .16 lb/d all year
001Mercury, total [as Hg]DAILY MX <= .32 lb/d all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]DAILY MX <= 21 lb/yr all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
003pHMINIMUM >= 5 SU all year
003pHMAXIMUM <= 11 SU all year
003Oil & GreaseDAILY AV report only all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Carbon, tot organic [TOC]DAILY MX <= 55 mg/L all year
003Zinc, total [as Zn]DAILY AV <= .25 mg/L all year
003Zinc, total [as Zn]DAILY MX <= .53 mg/L all year
003Flow, in conduit or thru treatment plantDAILY AV report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Mercury, total [as Hg]DAILY AV report only all year
003Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
003Mercury, total [as Hg]DAILY MX report only all year
003pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
003pH range excursions, monthly total accumMO TOTAL <= 446 min all year
005pHMINIMUM >= 5 SU all year
005pHMAXIMUM <= 11 SU all year
005Solids, total suspendedDAILY AV report only all year
005Solids, total suspendedDAILY MX report only all year
005Carbon, tot organic [TOC]DAILY AV report only all year
005Carbon, tot organic [TOC]DAILY MX report only all year
005Fluoride, total [as F]DAILY AV report only all year
005Fluoride, total [as F]DAILY MX <= 75 mg/L all year
005Copper, total [as Cu]DAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Mercury, total [as Hg]DAILY AV report only all year
005Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
005Mercury, total [as Hg]DAILY MX report only all year
005pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
005pH range excursions, monthly total accumMO TOTAL <= 446 min all year
006Oxygen demand, chem. [high level] [COD]DAILY AV report only all year
006Oxygen demand, chem. [high level] [COD]DAILY MX <= 200 mg/L all year
006pHMINIMUM >= 5 SU all year
006pHMAXIMUM <= 11 SU all year
006Solids, total suspendedDAILY AV report only all year
006Solids, total suspendedDAILY MX <= 90 mg/L all year
006Oil & GreaseDAILY AV report only all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Fluoride, total [as F]DAILY AV <= 18 mg/L all year
006Fluoride, total [as F]DAILY MX <= 20 mg/L all year
006Copper, total [as Cu]DAILY AV report only all year
006Copper, total [as Cu]DAILY MX report only all year
006Flow, in conduit or thru treatment plantDAILY AV report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Inorganic suspended solidsDAILY AV report only all year
006Inorganic suspended solidsDAILY MX <= 50 mg/L all year
006Mercury, total [as Hg]DAILY AV report only all year
006Mercury, total [as Hg]DAILY MX <= .005 mg/L all year
006Mercury, total [as Hg]DAILY MX report only all year
006pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
006pH range excursions, monthly total accumMO TOTAL <= 446 min all year
007pHMINIMUM >= 5 SU all year
007pHMAXIMUM <= 11 SU all year
007Solids, total suspendedDAILY AV report only all year
007Solids, total suspendedDAILY MX report only all year
007Carbon, tot organic [TOC]DAILY AV report only all year
007Carbon, tot organic [TOC]DAILY MX report only all year
007Fluoride, total [as F]DAILY AV report only all year
007Fluoride, total [as F]DAILY MX <= 75 mg/L all year
007Flow, in conduit or thru treatment plantDAILY AV report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Mercury, total [as Hg]DAILY AV report only all year
007Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
007Mercury, total [as Hg]DAILY MX report only all year
007pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
007pH range excursions, monthly total accumMO TOTAL <= 446 min all year
008pHMINIMUM >= 6 SU all year
008pHMAXIMUM <= 9 SU all year
008Oil & GreaseDAILY MX <= 15 mg/L all year
008Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
008Copper, total [as Cu]DAILY MX report only all year
008Flow, in conduit or thru treatment plantDAILY AV report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
008Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
008Mercury, total [as Hg]DAILY MX report only all year
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 9 SU all year
009Oil & GreaseDAILY MX <= 15 mg/L all year
009Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
009Flow, in conduit or thru treatment plantDAILY AV report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
009Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
009Mercury, total [as Hg]DAILY MX report only all year
010pHMINIMUM >= 6 SU all year
010pHMAXIMUM <= 9 SU all year
010Oil & GreaseDAILY MX <= 15 mg/L all year
010Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
010Cyanide, free [as free]DAILY MX report only all year
010Flow, in conduit or thru treatment plantDAILY AV report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
010Mercury, total [as Hg]DAILY MX report only all year
011pHMINIMUM >= 6 SU all year
011pHMAXIMUM <= 9 SU all year
011Oil & GreaseDAILY MX <= 15 mg/L all year
011Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
011Flow, in conduit or thru treatment plantDAILY AV report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
011Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
011Mercury, total [as Hg]DAILY MX report only all year
012pHMINIMUM >= 6 SU all year
012pHMAXIMUM <= 9 SU all year
012Oil & GreaseDAILY MX <= 15 mg/L all year
012Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
012Cyanide, free [as free]DAILY MX report only all year
012Flow, in conduit or thru treatment plantDAILY AV report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
012Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
012Mercury, total [as Hg]DAILY MX report only all year
013pHMINIMUM >= 6 SU all year
013pHMAXIMUM <= 9 SU all year
013Oil & GreaseDAILY MX <= 15 mg/L all year
013Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
013Cyanide, free [as free]DAILY MX report only all year
013Flow, in conduit or thru treatment plantDAILY AV report only all year
013Flow, in conduit or thru treatment plantDAILY MX report only all year
013Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
013Mercury, total [as Hg]DAILY MX report only all year
014pHMINIMUM >= 6 SU all year
014pHMAXIMUM <= 9 SU all year
014Oil & GreaseDAILY MX <= 15 mg/L all year
014Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
014Flow, in conduit or thru treatment plantDAILY AV report only all year
014Flow, in conduit or thru treatment plantDAILY MX report only all year
014Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
014Mercury, total [as Hg]DAILY MX report only all year
015pHMINIMUM >= 6 SU all year
015pHMAXIMUM <= 9 SU all year
015Oil & GreaseDAILY MX <= 15 mg/L all year
015Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
015Copper, total [as Cu]DAILY MX report only all year
015Flow, in conduit or thru treatment plantDAILY AV report only all year
015Flow, in conduit or thru treatment plantDAILY MX report only all year
015Mercury, total [as Hg]DAILY MX <= .01 mg/L all year
015Mercury, total [as Hg]DAILY MX report only all year
101Solids, total suspendedDAILY AV <= 2046 lb/d all year
101Solids, total suspendedDAILY MX <= 4211 lb/d all year
101Carbon, tot organic [TOC]DAILY AV <= 55 mg/L all year
101Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
101Fluoride, total [as F]DAILY AV <= 765 lb/d all year
101Fluoride, total [as F]DAILY MX <= 1608 lb/d all year
101Arsenic, total [as As]DAILY AV <= .1 mg/L all year
101Arsenic, total [as As]DAILY MX <= .3 mg/L all year
101Chromium, total [as Cr]DAILY AV <= 2.45 lb/d all year
101Chromium, total [as Cr]DAILY MX <= 8.24 lb/d all year
101Nickel, total [as Ni]DAILY AV <= 2.89 lb/d all year
101Nickel, total [as Ni]DAILY MX <= 9.57 lb/d all year
101Zinc, total [as Zn]DAILY AV <= 7.42 lb/d all year
101Zinc, total [as Zn]DAILY MX <= 23.7 lb/d all year
101Selenium, total [as Se]DAILY AV <= .1 mg/L all year
101Selenium, total [as Se]DAILY MX <= .3 mg/L all year
101Flow, in conduit or thru treatment plantDAILY AV <= 4.32 MGD all year
101Flow, in conduit or thru treatment plantDAILY MX <= 6.48 MGD all year
101Mercury, total [as Hg]DAILY AV report only all year
101Mercury, total [as Hg]DAILY MX report only all year
201Temperature, water deg. fahrenheitDAILY AV <= 117 deg F all year
201Temperature, water deg. fahrenheitDAILY MX <= 122 deg F all year
201Alkalinity, carbonate [as CaCO3]DAILY AV <= 25 mg/L all year
201Alkalinity, carbonate [as CaCO3]DAILY MX <= 50 mg/L all year
201Solids, total suspendedDAILY AV report only all year
201Solids, total suspendedDAILY MX report only all year
201Flow, in conduit or thru treatment plantDAILY AV <= 26 MGD all year
201Flow, in conduit or thru treatment plantDAILY MX <= 29 MGD all year
201Mercury, total [as Hg]DAILY AV report only all year
201Mercury, total [as Hg]DAILY MX report only all year
301Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
301Oil & GreaseDAILY MX <= 15 mg/L all year
301Carbon, tot organic [TOC]DAILY MX report only all year
301Flow, in conduit or thru treatment plantDAILY AV report only all year
301Flow, in conduit or thru treatment plantDAILY MX report only all year
301Percent Overflow Wastewater DischargedDAILY MX report only all year
301Mercury, total [as Hg]DAILY AV report only all year
301Mercury, total [as Hg]DAILY MX report only all year
401BOD, 5-day, 20 deg. CDAILY MX <= 65 mg/L all year
401Solids, total suspendedDAILY MX <= 65 mg/L all year
401Flow, in conduit or thru treatment plantDAILY AV report only all year
401Flow, in conduit or thru treatment plantDAILY MX report only all year
401EnterococciDAILY AV <= 14 CFU/100mL all year
401EnterococciDAILY MX <= 43 CFU/100mL all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TXAWhole effluent toxicity - retest #1SINGSAMP report only all year
TXAWhole effluent toxicity - retest #2SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP 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