STOLTHAVEN HOUSTON, INC.

NPDES permit TX0091855 · Major NON-POTW · effective, expires 2029-05-10 · 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

1values over a limit
0required values missing, on 0 form(s)
0of 54 forms filed late

Last period with anything received: 2026-07-31. Most often over: Oil & Grease (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 (239)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CDAILY AV <= 53 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 163 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY AV <= 30.6 mg/L all year
001Solids, total suspendedDAILY MX <= 127 mg/L all year
001Oil & GreaseDAILY AV <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
001Arsenic, total [as As]DAILY AV <= .1 mg/L all year
001Arsenic, total [as As]DAILY MX <= .3 mg/L all year
001Cadmium, total [as Cd]DAILY AV <= .0102 mg/L all year
001Cadmium, total [as Cd]DAILY MX <= .0172 mg/L all year
001Chromium, total [as Cr]DAILY AV <= .323 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .746 mg/L all year
001Cobalt, total [as Co]DAILY AV <= 18.8 mg/L all year
001Cobalt, total [as Co]DAILY MX <= 56.4 mg/L all year
001Copper, total [as Cu]DAILY AV <= .0151 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0319 mg/L all year
001Lead, total [as Pb]DAILY AV <= .111 mg/L all year
001Lead, total [as Pb]DAILY MX <= .235 mg/L all year
001Zinc, total [as Zn]DAILY AV <= .246 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .497 mg/L all year
001Tin, total [as Sn]DAILY AV <= .165 mg/L all year
001Tin, total [as Sn]DAILY MX <= .335 mg/L all year
001Carbon tetrachlorideDAILY AV <= .05 mg/L all year
001Carbon tetrachlorideDAILY MX <= .05 mg/L all year
001ChloroformDAILY AV <= .075 mg/L all year
001ChloroformDAILY MX <= .075 mg/L all year
001TolueneDAILY AV <= .028 mg/L all year
001TolueneDAILY MX <= .074 mg/L all year
001BenzeneDAILY AV <= .057 mg/L all year
001BenzeneDAILY MX <= .125 mg/L all year
001AcrylonitrileDAILY AV <= .05 mg/L all year
001AcrylonitrileDAILY MX <= .05 mg/L all year
001Butyl benzyl phthalateDAILY AV <= .0887 mg/L all year
001Butyl benzyl phthalateDAILY MX <= .188 mg/L all year
001ChlorobenzeneDAILY AV <= .1 mg/L all year
001ChlorobenzeneDAILY MX <= .1 mg/L all year
001EthylbenzeneDAILY AV <= .142 mg/L all year
001EthylbenzeneDAILY MX <= .275 mg/L all year
001FluorantheneDAILY AV <= .0268 mg/L all year
001FluorantheneDAILY MX <= .0537 mg/L all year
001Methylene chlorideDAILY AV <= .036 mg/L all year
001Methylene chlorideDAILY MX <= .05 mg/L all year
001TetrachloroethyleneDAILY AV <= .052 mg/L all year
001TetrachloroethyleneDAILY MX <= .164 mg/L all year
0011,1,1-TrichloroethaneDAILY AV <= .022 mg/L all year
0011,1,1-TrichloroethaneDAILY MX <= .05 mg/L all year
0011,1,2-TrichloroethaneDAILY AV <= .032 mg/L all year
0011,1,2-TrichloroethaneDAILY MX <= .075 mg/L all year
0012,4,6-TrichlorophenolDAILY AV <= .106 mg/L all year
0012,4,6-TrichlorophenolDAILY MX <= .155 mg/L all year
001PhenolDAILY AV <= .019 mg/L all year
001PhenolDAILY MX <= .047 mg/L all year
001NaphthaleneDAILY AV <= .019 mg/L all year
001NaphthaleneDAILY MX <= .047 mg/L all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= .101 mg/L all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .215 mg/L all year
001TrichloroethyleneDAILY AV <= .026 mg/L all year
001TrichloroethyleneDAILY MX <= .069 mg/L all year
001PhenolsDAILY MX <= .7 mg/L all year
001Flow, in conduit or thru treatment plantDAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001o-CresolDAILY AV <= .561 mg/L all year
001o-CresolDAILY MX <= 1.92 mg/L all year
001Mercury, total [as Hg]DAILY AV <= .0002 mg/L all year
001Mercury, total [as Hg]DAILY MX <= .00042 mg/L all year
001PyridineDAILY AV <= .182 mg/L all year
001PyridineDAILY MX <= .37 mg/L all year
001p-CresolDAILY AV <= .205 mg/L all year
001p-CresolDAILY MX <= .698 mg/L all year
001n-DecaneDAILY AV <= .437 mg/L all year
001n-DecaneDAILY MX <= .948 mg/L all year
001CarbazoleDAILY AV <= .276 mg/L all year
001CarbazoleDAILY MX <= .598 mg/L all year
001n-OctadecaneDAILY AV <= .302 mg/L all year
001n-OctadecaneDAILY MX <= .589 mg/L all year
001Halogen, total organicDAILY MX <= 2 mg/L all year
001N-NitrosodiethylamineDAILY AV <= .071 mg/L all year
001N-NitrosodiethylamineDAILY MX <= .151 mg/L all year
0012-ButanoneDAILY AV <= 1.85 mg/L all year
0012-ButanoneDAILY MX <= 4.81 mg/L all year
001DichlorobenzeneDAILY AV <= .25 mg/L all year
001DichlorobenzeneDAILY MX <= .25 mg/L all year
001AcetoneDAILY AV <= 7.97 mg/L all year
001AcetoneDAILY MX <= 30.2 mg/L all year
001AcetophenoneDAILY AV <= .0562 mg/L all year
001AcetophenoneDAILY MX <= .114 mg/L all year
003Oxygen, dissolved [DO]MO MIN >= 4 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedDAILY AV report only all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspendedDAILY AV <= 49 lb/d all year
003Solids, total suspendedDAILY MX <= 119 lb/d all year
003Oil & GreaseDAILY AV report only all year
003Oil & GreaseDAILY MX report only all year
003Oil & GreaseDAILY AV <= 16.8 lb/d all year
003Oil & GreaseDAILY MX <= 30 lb/d all year
003Nitrogen, ammonia total [as N]DAILY AV report only all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Nitrogen, ammonia total [as N]DAILY AV <= 5 lb/d all year
003Nitrogen, ammonia total [as N]DAILY MX <= 16.8 lb/d all year
003Carbon, tot organic [TOC]DAILY AV report only all year
003Carbon, tot organic [TOC]DAILY MX report only all year
003Carbon, tot organic [TOC]DAILY AV <= 250 lb/d all year
003Carbon, tot organic [TOC]DAILY MX <= 350 lb/d all year
003Cyanide, free [as free]DAILY AV <= .0087 mg/L all year
003Cyanide, free [as free]DAILY MX <= .018 mg/L all year
003Arsenic, total [as As]DAILY AV <= .1 mg/L all year
003Arsenic, total [as As]DAILY MX <= .2 mg/L all year
003Cadmium, total [as Cd]DAILY AV <= .0102 mg/L all year
003Cadmium, total [as Cd]DAILY MX <= .0172 mg/L all year
003Chromium, total [as Cr]DAILY AV <= .323 mg/L all year
003Chromium, total [as Cr]DAILY MX <= .746 mg/L all year
003Cobalt, total [as Co]DAILY AV <= 17.9 mg/L all year
003Cobalt, total [as Co]DAILY MX <= 53.6 mg/L all year
003Copper, total [as Cu]DAILY AV <= .024 mg/L all year
003Copper, total [as Cu]DAILY MX <= .0508 mg/L all year
003Lead, total [as Pb]DAILY AV <= .155 mg/L all year
003Lead, total [as Pb]DAILY MX <= .329 mg/L all year
003Zinc, total [as Zn]DAILY AV <= .154 mg/L all year
003Zinc, total [as Zn]DAILY MX <= .325 mg/L all year
003Tin, total [as Sn]DAILY AV <= .16 mg/L all year
003Tin, total [as Sn]DAILY MX <= .32 mg/L all year
003Carbon tetrachlorideDAILY AV <= .05 mg/L all year
003Carbon tetrachlorideDAILY MX <= .05 mg/L all year
003ChloroformDAILY AV <= .075 mg/L all year
003ChloroformDAILY MX <= .075 mg/L all year
003TolueneDAILY AV <= .028 mg/L all year
003TolueneDAILY MX <= .074 mg/L all year
003BenzeneDAILY AV <= .057 mg/L all year
003BenzeneDAILY MX <= .125 mg/L all year
003AcrylonitrileDAILY AV <= .05 mg/L all year
003AcrylonitrileDAILY MX <= .05 mg/L all year
003Butyl benzyl phthalateDAILY AV <= .085 mg/L all year
003Butyl benzyl phthalateDAILY MX <= .18 mg/L all year
003ChlorobenzeneDAILY AV <= .1 mg/L all year
003ChlorobenzeneDAILY MX <= .1 mg/L all year
003EthylbenzeneDAILY AV <= .142 mg/L all year
003EthylbenzeneDAILY MX <= .275 mg/L all year
003FluorantheneDAILY AV <= .026 mg/L all year
003FluorantheneDAILY MX <= .052 mg/L all year
003Methylene chlorideDAILY AV <= .036 mg/L all year
003Methylene chlorideDAILY MX <= .05 mg/L all year
003TetrachloroethyleneDAILY AV <= .052 mg/L all year
003TetrachloroethyleneDAILY MX <= .164 mg/L all year
0031,1,1-TrichloroethaneDAILY AV <= .022 mg/L all year
0031,1,1-TrichloroethaneDAILY MX <= .05 mg/L all year
0031,1,2-TrichloroethaneDAILY AV <= .032 mg/L all year
0031,1,2-TrichloroethaneDAILY MX <= .075 mg/L all year
0032,4,6-TrichlorophenolDAILY AV <= .1 mg/L all year
0032,4,6-TrichlorophenolDAILY MX <= .15 mg/L all year
003PhenolDAILY AV <= .019 mg/L all year
003PhenolDAILY MX <= .047 mg/L all year
003NaphthaleneDAILY AV <= .019 mg/L all year
003NaphthaleneDAILY MX <= .047 mg/L all year
003Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= .1 mg/L all year
003Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .21 mg/L all year
003TrichloroethyleneDAILY AV <= .026 mg/L all year
003TrichloroethyleneDAILY MX <= .069 mg/L all year
003Flow, in conduit or thru treatment plantDAILY AV <= .2016 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX <= .2448 MGD all year
003o-CresolDAILY AV <= .53 mg/L all year
003o-CresolDAILY MX <= 1.83 mg/L all year
003EnterococciDAILY AV <= 35 CFU/100mL all year
003EnterococciDAILY MX <= 104 CFU/100mL all year
003Mercury, total [as Hg]DAILY AV <= .00085 mg/L all year
003Mercury, total [as Hg]DAILY MX <= .0018 mg/L all year
003PyridineDAILY AV <= .17 mg/L all year
003PyridineDAILY MX <= .35 mg/L all year
003p-CresolDAILY AV <= .2 mg/L all year
003p-CresolDAILY MX <= .66 mg/L all year
003n-DecaneDAILY AV <= .42 mg/L all year
003n-DecaneDAILY MX <= .9 mg/L all year
003CarbazoleDAILY AV <= .26 mg/L all year
003CarbazoleDAILY MX <= .57 mg/L all year
003n-OctadecaneDAILY AV <= .29 mg/L all year
003n-OctadecaneDAILY MX <= .56 mg/L all year
003Halogen, total organicDAILY MX <= 2 mg/L all year
0032-ButanoneDAILY AV <= 1.76 mg/L all year
0032-ButanoneDAILY MX <= 4.57 mg/L all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV report only all year
003BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
003BOD, carbonaceous [5 day, 20 C]DAILY AV <= 16.8 lb/d all year
003BOD, carbonaceous [5 day, 20 C]DAILY MX <= 42 lb/d all year
003DichlorobenzeneDAILY AV <= .25 mg/L all year
003DichlorobenzeneDAILY MX <= .25 mg/L all year
003AcetoneDAILY AV <= 7.57 mg/L all year
003AcetoneDAILY MX <= 28.7 mg/L all year
003AcetophenoneDAILY AV <= .054 mg/L all year
003AcetophenoneDAILY MX <= .11 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
004Flow, in conduit or thru treatment plantDAILY AV report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Carbon, tot organic [TOC]DAILY MX <= 75 mg/L 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
TX3Whole effluent toxicity - retest #17 DA MIN report only all year
TX3Whole effluent toxicity - retest #1MO AV MN report only all year
TX3Whole effluent toxicity - retest #27 DA MIN report only all year
TX3Whole effluent toxicity - retest #2MO AV MN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX3LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX3LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllinaMO AV MN report only all year
TXCWhole effluent toxicity - retest #1SINGSAMP report only all year
TXCWhole effluent toxicity - retest #2SINGSAMP report only all year
TXCWhole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN >= 100 % all year
TXCWhole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)MO AV MN >= 100 % all year
TXCLC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXCLC50 Pass/Fail Static 24Hr Acute Menidia beryllinaSINGSAMP report only all year

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