EQUISTAR CHEMICALS, LP

NPDES permit TX0087173 · Major NON-POTW · administratively continued, expires 2026-03-23 · 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.

This permit expired on 2026-03-23 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 58 forms filed late

Last period with anything received: 2026-08-31.

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 (190)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO MIN >= 4 mg/L all year
001BOD, 5-day, 20 deg. CDAILY AV <= 119 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 289 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY AV <= 262 lb/d all year
001Solids, total suspendedDAILY MX <= 672 lb/d all year
001Oil & GreaseDAILY AV <= 60 lb/d all year
001Oil & GreaseDAILY MX <= 91 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 36 lb/d all year
001Carbon, tot organic [TOC]DAILY AV <= 450 lb/d all year
001Carbon, tot organic [TOC]DAILY MX <= 902 lb/d all year
001Carbon tetrachlorideDAILY AV <= .02 lb/d all year
001Carbon tetrachlorideDAILY MX <= .03 lb/d all year
0011,2-DichloroethaneDAILY AV <= .06 lb/d all year
0011,2-DichloroethaneDAILY MX <= .19 lb/d all year
001ChloroformDAILY AV <= .531 lb/d all year
001ChloroformDAILY MX <= 1.55 lb/d all year
001TolueneDAILY AV <= .02 lb/d all year
001TolueneDAILY MX <= .07 lb/d all year
001BenzeneDAILY AV <= .03 lb/d all year
001BenzeneDAILY MX <= .12 lb/d all year
001AcenaphthyleneDAILY AV <= .02 lb/d all year
001AcenaphthyleneDAILY MX <= .05 lb/d all year
001AcenaphtheneDAILY AV <= .02 lb/d all year
001AcenaphtheneDAILY MX <= .05 lb/d all year
001AcrylonitrileDAILY AV <= .09 lb/d all year
001AcrylonitrileDAILY MX <= .22 lb/d all year
001AnthraceneDAILY AV <= .02 lb/d all year
001AnthraceneDAILY MX <= .05 lb/d all year
001Benzo[b]fluorantheneDAILY AV <= .02 lb/d all year
001Benzo[b]fluorantheneDAILY MX <= .06 lb/d all year
001Benzo[k]fluorantheneDAILY AV <= .02 lb/d all year
001Benzo[k]fluorantheneDAILY MX <= .05 lb/d all year
001Benzo[a]pyreneDAILY AV <= .00067 lb/d all year
001Benzo[a]pyreneDAILY MX <= .00141 lb/d all year
001ChlorobenzeneDAILY AV <= .01 lb/d all year
001ChlorobenzeneDAILY MX <= .03 lb/d all year
001ChryseneDAILY AV <= .02 lb/d all year
001ChryseneDAILY MX <= .05 lb/d all year
001Diethyl phthalateDAILY AV <= .07 lb/d all year
001Diethyl phthalateDAILY MX <= .19 lb/d all year
001Dimethyl phthalateDAILY AV <= .02 lb/d all year
001Dimethyl phthalateDAILY MX <= .04 lb/d all year
001EthylbenzeneDAILY AV <= .03 lb/d all year
001EthylbenzeneDAILY MX <= .1 lb/d all year
001FluorantheneDAILY AV <= .02 lb/d all year
001FluorantheneDAILY MX <= .06 lb/d all year
001FluoreneDAILY AV <= .02 lb/d all year
001FluoreneDAILY MX <= .05 lb/d all year
001HexachlorobutadieneDAILY AV <= .02 lb/d all year
001HexachlorobutadieneDAILY MX <= .04 lb/d all year
001HexachloroethaneDAILY AV <= .02 lb/d all year
001HexachloroethaneDAILY MX <= .05 lb/d all year
001Methyl chloride [Chloromethane]DAILY AV <= .08 lb/d all year
001Methyl chloride [Chloromethane]DAILY MX <= .17 lb/d all year
001Methylene chlorideDAILY AV <= .04 lb/d all year
001Methylene chlorideDAILY MX <= .08 lb/d all year
001NitrobenzeneDAILY AV <= .02 lb/d all year
001NitrobenzeneDAILY MX <= .06 lb/d all year
001PhenanthreneDAILY AV <= .02 lb/d all year
001PhenanthreneDAILY MX <= .05 lb/d all year
001PyreneDAILY AV <= .03 lb/d all year
001PyreneDAILY MX <= .06 lb/d all year
001TetrachloroethyleneDAILY AV <= .02 lb/d all year
001TetrachloroethyleneDAILY MX <= .05 lb/d all year
0011,1-DichloroethaneDAILY AV <= .02 lb/d all year
0011,1-DichloroethaneDAILY MX <= .05 lb/d all year
0011,1-DichloroethyleneDAILY AV <= .01 lb/d all year
0011,1-DichloroethyleneDAILY MX <= .02 lb/d all year
0011,1,1-TrichloroethaneDAILY AV <= .02 lb/d all year
0011,1,1-TrichloroethaneDAILY MX <= .05 lb/d all year
0011,1,2-TrichloroethaneDAILY AV <= .02 lb/d all year
0011,1,2-TrichloroethaneDAILY MX <= .05 lb/d all year
001Benzo[a]anthraceneDAILY AV <= .0067 lb/d all year
001Benzo[a]anthraceneDAILY MX <= .0141 lb/d all year
0011,2-DichlorobenzeneDAILY AV <= .07 lb/d all year
0011,2-DichlorobenzeneDAILY MX <= .15 lb/d all year
0011,2-DichloropropaneDAILY AV <= .14 lb/d all year
0011,2-DichloropropaneDAILY MX <= .21 lb/d all year
001trans-1,2-DichloroethyleneDAILY AV <= .02 lb/d all year
001trans-1,2-DichloroethyleneDAILY MX <= .05 lb/d all year
0011,2,4-TrichlorobenzeneDAILY AV <= .06 lb/d all year
0011,2,4-TrichlorobenzeneDAILY MX <= .13 lb/d all year
0011,3-DichlorobenzeneDAILY AV <= .03 lb/d all year
0011,3-DichlorobenzeneDAILY MX <= .04 lb/d all year
0011,4-DichlorobenzeneDAILY AV <= .01 lb/d all year
0011,4-DichlorobenzeneDAILY MX <= .03 lb/d all year
0012-ChlorophenolDAILY AV <= .03 lb/d all year
0012-ChlorophenolDAILY MX <= .09 lb/d all year
0012-NitrophenolDAILY AV <= .04 lb/d all year
0012-NitrophenolDAILY MX <= .06 lb/d all year
0012,4-DichlorophenolDAILY AV <= .04 lb/d all year
0012,4-DichlorophenolDAILY MX <= .1 lb/d all year
0012,4-DimethylphenolDAILY AV <= .02 lb/d all year
0012,4-DimethylphenolDAILY MX <= .03 lb/d all year
0012,4-DinitrotolueneDAILY AV <= .1 lb/d all year
0012,4-DinitrotolueneDAILY MX <= .26 lb/d all year
0012,4-DinitrophenolDAILY AV <= .07 lb/d all year
0012,4-DinitrophenolDAILY MX <= .11 lb/d all year
0012,6-DinitrotolueneDAILY AV <= .23 lb/d all year
0012,6-DinitrotolueneDAILY MX <= .59 lb/d all year
0014-NitrophenolDAILY AV <= .07 lb/d all year
0014-NitrophenolDAILY MX <= .11 lb/d all year
0014,6-Dinitro-o-cresolDAILY AV <= .07 lb/d all year
0014,6-Dinitro-o-cresolDAILY MX <= .25 lb/d all year
001PhenolDAILY AV <= .01 lb/d all year
001PhenolDAILY MX <= .02 lb/d all year
001NaphthaleneDAILY AV <= .02 lb/d all year
001NaphthaleneDAILY MX <= .05 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= .09 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .26 lb/d all year
001Di-n-butyl phthalateDAILY AV <= .02 lb/d all year
001Di-n-butyl phthalateDAILY MX <= .05 lb/d all year
001Vinyl chlorideDAILY AV <= .1 lb/d all year
001Vinyl chlorideDAILY MX <= .25 lb/d all year
001TrichloroethyleneDAILY AV <= .02 lb/d all year
001TrichloroethyleneDAILY MX <= .05 lb/d all year
001HexachlorobenzeneDAILY AV <= .000181 lb/d all year
001HexachlorobenzeneDAILY MX <= .000384 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= .936 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 1.444 MGD all year
0011,3-DichloropropyleneDAILY AV <= .03 lb/d all year
0011,3-DichloropropyleneDAILY MX <= .04 lb/d all year
001ChloroethaneDAILY AV <= .1 lb/d all year
001ChloroethaneDAILY MX <= .25 lb/d all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9.5 SU all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Carbon, tot organic [TOC]DAILY MX <= 55 mg/L all year
002Copper, total [as Cu]DAILY AV report only all year
002Copper, total [as Cu]DAILY MX <= .0165 mg/L all year
002Zinc, total [as Zn]DAILY AV report only all year
002Zinc, total [as Zn]DAILY MX report only all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
101BOD, 5-day, 20 deg. CDAILY AV <= 20 mg/L all year
101BOD, 5-day, 20 deg. CDAILY MX <= 65 mg/L all year
101pHMINIMUM >= 6 SU all year
101pHMAXIMUM <= 9 SU all year
101Solids, total suspendedDAILY AV <= 20 mg/L all year
101Solids, total suspendedDAILY MX <= 65 mg/L all year
101Flow, in conduit or thru treatment plantDAILY AV report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Chlorine, total residualMO MIN >= 1 mg/L all year
101EnterococciDAILY AV <= 35 CFU/100mL all year
101EnterococciDAILY MX <= 89 CFU/100mL all year
201pHMINIMUM >= 6 SU all year
201pHMAXIMUM <= 9 SU all year
201Solids, total suspendedDAILY MX <= 65 mg/L all year
201Oil & GreaseDAILY MX <= 15 mg/L all year
201Iron, total [as Fe]DAILY MX <= 1.3 mg/L all year
201Flow, in conduit or thru treatment plantDAILY AV report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only 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 #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN 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
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