GULF COAST AUTHORITY

NPDES permit TX0005380 · Major NON-POTW · effective, expires 2031-03-30 · 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 19 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).

Limits in force (214)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY AV <= 11293 lb/d all year
001Solids, total suspendedDAILY MX <= 31315 lb/d all year
001Oil & GreaseDAILY AV <= 2707 lb/d all year
001Oil & GreaseDAILY MX <= 4210 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 1127 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 2082 lb/d all year
001Carbon, tot organic [TOC]DAILY AV <= 22030 lb/d all year
001Carbon, tot organic [TOC]DAILY MX <= 30542 lb/d all year
001Cyanide, free [amenable to chlorination]DAILY AV <= 1.46 lb/d all year
001Cyanide, free [amenable to chlorination]DAILY MX <= 3.1 lb/d all year
001Arsenic, total [as As]DAILY AV <= .1 mg/L all year
001Arsenic, total [as As]DAILY MX <= .2 mg/L all year
001Cadmium, total [as Cd]DAILY AV <= .008 mg/L all year
001Cadmium, total [as Cd]DAILY MX <= .013 mg/L all year
001Chromium, total [as Cr]DAILY AV <= 45 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 87.4 lb/d all year
001Cobalt, total [as Co]DAILY AV <= .176 mg/L all year
001Cobalt, total [as Co]DAILY MX <= .547 mg/L all year
001Copper, total [as Cu]DAILY AV <= 4 lb/d all year
001Copper, total [as Cu]DAILY MX <= 8.48 lb/d all year
001Lead, total [as Pb]DAILY AV <= 28.2 lb/d all year
001Lead, total [as Pb]DAILY MX <= 60 lb/d all year
001Nickel, total [as Ni]DAILY AV <= 26.7 lb/d all year
001Nickel, total [as Ni]DAILY MX <= 56.5 lb/d all year
001Silver, total [as Ag]DAILY AV <= 1.21 lb/d all year
001Silver, total [as Ag]DAILY MX <= 2.57 lb/d all year
001Zinc, total [as Zn]DAILY AV <= 41 lb/d all year
001Zinc, total [as Zn]DAILY MX <= 86.8 lb/d all year
001Tin, total [as Sn]DAILY AV <= .132 mg/L all year
001Tin, total [as Sn]DAILY MX <= .268 mg/L all year
001Carbon tetrachlorideDAILY AV <= 3.62 lb/d all year
001Carbon tetrachlorideDAILY MX <= 8.53 lb/d all year
0011,2-DichloroethaneDAILY AV <= 9.73 lb/d all year
0011,2-DichloroethaneDAILY MX <= 30.4 lb/d all year
001BromoformDAILY AV <= 49 lb/d all year
001BromoformDAILY MX <= 198 lb/d all year
001DibromochloromethaneDAILY AV <= 9.26 lb/d all year
001DibromochloromethaneDAILY MX <= 14.7 lb/d all year
001ChloroformDAILY AV <= 34.2 lb/d all year
001ChloroformDAILY MX <= 40.3 lb/d all year
001TolueneDAILY AV <= 3.27 lb/d all year
001TolueneDAILY MX <= 9.91 lb/d all year
001BenzeneDAILY AV <= 4.84 lb/d all year
001BenzeneDAILY MX <= 17 lb/d all year
001AcenaphthyleneDAILY AV <= 2.71 lb/d all year
001AcenaphthyleneDAILY MX <= 7.23 lb/d all year
001AcenaphtheneDAILY AV <= 2.71 lb/d all year
001AcenaphtheneDAILY MX <= 7.23 lb/d all year
001AcrylonitrileDAILY AV <= 12 lb/d all year
001AcrylonitrileDAILY MX <= 30.1 lb/d all year
001AnthraceneDAILY AV <= 2.71 lb/d all year
001AnthraceneDAILY MX <= 7.23 lb/d all year
001Benzo[b]fluorantheneDAILY AV <= 2.83 lb/d all year
001Benzo[b]fluorantheneDAILY MX <= 7.46 lb/d all year
001Benzo[k]fluorantheneDAILY AV <= 2.71 lb/d all year
001Benzo[k]fluorantheneDAILY MX <= 7.23 lb/d all year
001Benzo[a]pyreneDAILY AV <= .014 lb/d all year
001Benzo[a]pyreneDAILY MX <= .03 lb/d all year
001Bis[2-chloroisopropyl] etherDAILY AV <= 34 lb/d all year
001Bis[2-chloroisopropyl] etherDAILY MX <= 85.6 lb/d all year
001Butyl benzyl phthalateDAILY AV <= .07 mg/L all year
001Butyl benzyl phthalateDAILY MX <= .15 mg/L all year
001ChlorobenzeneDAILY AV <= 3.28 lb/d all year
001ChlorobenzeneDAILY MX <= 7.39 lb/d all year
001ChryseneDAILY AV <= 2.71 lb/d all year
001ChryseneDAILY MX <= 7.23 lb/d all year
001Diethyl phthalateDAILY AV <= 9.72 lb/d all year
001Diethyl phthalateDAILY MX <= 24.3 lb/d all year
001Dimethyl phthalateDAILY AV <= 2.37 lb/d all year
001Dimethyl phthalateDAILY MX <= 5.86 lb/d all year
001EthylbenzeneDAILY AV <= 5.21 lb/d all year
001EthylbenzeneDAILY MX <= 16.5 lb/d all year
001FluorantheneDAILY AV <= 3.16 lb/d all year
001FluorantheneDAILY MX <= 8.45 lb/d all year
001FluoreneDAILY AV <= 2.71 lb/d all year
001FluoreneDAILY MX <= 7.23 lb/d all year
001HexachlorobutadieneDAILY AV <= 1.25 lb/d all year
001HexachlorobutadieneDAILY MX <= 2.65 lb/d all year
001HexachloroethaneDAILY AV <= 4.56 lb/d all year
001HexachloroethaneDAILY MX <= 15 lb/d all year
001Methyl chloride [Chloromethane]DAILY AV <= 11 lb/d all year
001Methyl chloride [Chloromethane]DAILY MX <= 24.9 lb/d all year
001Methylene chlorideDAILY AV <= 4.95 lb/d all year
001Methylene chlorideDAILY MX <= 12 lb/d all year
001NitrobenzeneDAILY AV <= 27.9 lb/d all year
001NitrobenzeneDAILY MX <= 78.7 lb/d all year
001PhenanthreneDAILY AV <= 2.01 lb/d all year
001PhenanthreneDAILY MX <= 4.25 lb/d all year
001PyreneDAILY AV <= 3.06 lb/d all year
001PyreneDAILY MX <= 8.15 lb/d all year
001TetrachloroethyleneDAILY AV <= 3.08 lb/d all year
001TetrachloroethyleneDAILY MX <= 8.19 lb/d all year
0011,1-DichloroethaneDAILY AV <= 2.74 lb/d all year
0011,1-DichloroethaneDAILY MX <= 7.36 lb/d all year
0011,1-DichloroethyleneDAILY AV <= 2.06 lb/d all year
0011,1-DichloroethyleneDAILY MX <= 3.51 lb/d all year
0011,1,1-TrichloroethaneDAILY AV <= 2.63 lb/d all year
0011,1,1-TrichloroethaneDAILY MX <= 6.79 lb/d all year
0011,1,2-TrichloroethaneDAILY AV <= 2.74 lb/d all year
0011,1,2-TrichloroethaneDAILY MX <= 7.55 lb/d all year
001Benzo[a]anthraceneDAILY AV <= .142 lb/d all year
001Benzo[a]anthraceneDAILY MX <= .3 lb/d all year
0011,2-DichlorobenzeneDAILY AV <= 10.09 lb/d all year
0011,2-DichlorobenzeneDAILY MX <= 27.3 lb/d all year
0011,2-DichloropropaneDAILY AV <= 19.6 lb/d all year
0011,2-DichloropropaneDAILY MX <= 35 lb/d all year
001trans-1,2-DichloroethyleneDAILY AV <= 2.67 lb/d all year
001trans-1,2-DichloroethyleneDAILY MX <= 6.87 lb/d all year
0011,2,4-TrichlorobenzeneDAILY AV <= 9.9 lb/d all year
0011,2,4-TrichlorobenzeneDAILY MX <= 24.7 lb/d all year
0011,3-DichlorobenzeneDAILY AV <= 5.09 lb/d all year
0011,3-DichlorobenzeneDAILY MX <= 9.21 lb/d all year
0011,4-DichlorobenzeneDAILY AV <= 3.28 lb/d all year
0011,4-DichlorobenzeneDAILY MX <= 7.39 lb/d all year
0012-ChlorophenolDAILY AV <= 3.86 lb/d all year
0012-ChlorophenolDAILY MX <= 12.2 lb/d all year
0012-NitrophenolDAILY AV <= 5.38 lb/d all year
0012-NitrophenolDAILY MX <= 10.4 lb/d all year
0012,4-DichlorophenolDAILY AV <= 4.86 lb/d all year
0012,4-DichlorophenolDAILY MX <= 14 lb/d all year
0012,4-DimethylphenolDAILY AV <= 2.26 lb/d all year
0012,4-DimethylphenolDAILY MX <= 4.61 lb/d all year
0012,4-DinitrotolueneDAILY AV <= 14.1 lb/d all year
0012,4-DinitrotolueneDAILY MX <= 35.6 lb/d all year
0012,4-DinitrophenolDAILY AV <= 21.5 lb/d all year
0012,4-DinitrophenolDAILY MX <= 61.6 lb/d all year
0012,4,6-TrichlorophenolDAILY AV <= 17.4 lb/d all year
0012,4,6-TrichlorophenolDAILY MX <= 25.5 lb/d all year
0012,6-DinitrotolueneDAILY AV <= 31.8 lb/d all year
0012,6-DinitrotolueneDAILY MX <= 80 lb/d all year
0014-NitrophenolDAILY AV <= 9.99 lb/d all year
0014-NitrophenolDAILY MX <= 20.5 lb/d all year
0014,6-Dinitro-o-cresolDAILY AV <= 9.74 lb/d all year
0014,6-Dinitro-o-cresolDAILY MX <= 34.6 lb/d all year
001PhenolDAILY AV <= 53 lb/d all year
001PhenolDAILY MX <= 175 lb/d all year
001NaphthaleneDAILY AV <= 2.71 lb/d all year
001NaphthaleneDAILY MX <= 7.23 lb/d all year
001Surfactants [MBAS]DAILY AV <= 284 lb/d all year
001Surfactants [MBAS]DAILY MX <= 568 lb/d all year
001BromomethaneDAILY AV <= 35.5 lb/d all year
001BromomethaneDAILY MX <= 95.1 lb/d all year
001Bromodichloromethane, effluentDAILY AV <= 27.7 lb/d all year
001Bromodichloromethane, effluentDAILY MX <= 43.3 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= 12.9 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 35 lb/d all year
001Di-n-butyl phthalateDAILY AV <= 3.29 lb/d all year
001Di-n-butyl phthalateDAILY MX <= 6.96 lb/d all year
001Vinyl chlorideDAILY AV <= 12.9 lb/d all year
001Vinyl chlorideDAILY MX <= 32.4 lb/d all year
001TrichloroethyleneDAILY AV <= 2.68 lb/d all year
001TrichloroethyleneDAILY MX <= 6.91 lb/d all year
001HexachlorobenzeneDAILY AV <= .0039 lb/d all year
001HexachlorobenzeneDAILY MX <= .0082 lb/d all year
001Sodium salt of acifluorofenDAILY AV <= .5 mg/L all year
001Sodium salt of acifluorofenDAILY MX <= .5 mg/L all year
001Flow, in conduit or thru treatment plantDAILY AV <= 30 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 40 MGD all year
001Chlorine, total residualMO MIN >= .5 mg/L all year
001Chlorine, total residualMO MAX <= 4 mg/L all year
0011,3-DichloropropyleneDAILY AV <= 5.47 lb/d all year
0011,3-DichloropropyleneDAILY MX <= 13.8 lb/d all year
001o-CresolDAILY AV <= 92.5 lb/d all year
001o-CresolDAILY MX <= 316 lb/d all year
001EnterococciDAILY AV <= 35 CFU/100mL all year
001EnterococciDAILY MX <= 104 CFU/100mL all year
001Mercury, total [as Hg]DAILY AV <= .142 lb/d all year
001Mercury, total [as Hg]DAILY MX <= .301 lb/d all year
001PyridineDAILY AV <= 30 lb/d all year
001PyridineDAILY MX <= 61 lb/d all year
001p-CresolDAILY AV <= 33.8 lb/d all year
001p-CresolDAILY MX <= 115 lb/d all year
001n-DecaneDAILY AV <= .349 mg/L all year
001n-DecaneDAILY MX <= .758 mg/L all year
001CarbazoleDAILY AV <= .22 mg/L all year
001CarbazoleDAILY MX <= .478 mg/L all year
001n-OctadecaneDAILY AV <= .241 mg/L all year
001n-OctadecaneDAILY MX <= .471 mg/L all year
0012-ButanoneDAILY AV <= 305 lb/d all year
0012-ButanoneDAILY MX <= 793 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 6308 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 15238 lb/d all year
001AcetoneDAILY AV <= 1314 lb/d all year
001AcetoneDAILY MX <= 4982 lb/d all year
001AcetophenoneDAILY AV <= 9.26 lb/d all year
001AcetophenoneDAILY MX <= 18.8 lb/d all year
001ParaquatDAILY AV <= .5 mg/L all year
001ParaquatDAILY MX <= .5 mg/L all year
001ChloroethaneDAILY AV <= 13 lb/d all year
001ChloroethaneDAILY MX <= 33.7 lb/d 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
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia)7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia)MO AV MN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX1IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX1IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX1IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN 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 beryllinaSINGSAMP report only all year

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