EQUISTAR CHEMICALS, LP

NPDES permit TX0076996 · Major NON-POTW · administratively continued, expires 2026-08-11 · 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 2026-08-11 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

3values over a limit
0required values missing, on 0 form(s)
1of 52 forms filed late

Last period with anything received: 2026-07-31. Most often over: Enterococci (2), Carbon, tot organic [TOC] (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 (203)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 105 deg F all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 1306 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 1749 lb/d all year
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Solids, total suspendedDAILY AV <= 287 lb/d all year
001Solids, total suspendedDAILY MX <= 755 lb/d all year
001Oil & GreaseDAILY AV <= 45 lb/d all year
001Oil & GreaseDAILY MX <= 68 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 45 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 68 lb/d all year
001Cyanide, free [amenable to chlorination]DAILY AV <= .0088 mg/L all year
001Cyanide, free [amenable to chlorination]DAILY MX <= .019 mg/L all year
001Cyanide, free [amenable to chlorination]DAILY AV <= .12 lb/d all year
001Cyanide, free [amenable to chlorination]DAILY MX <= .25 lb/d all year
001Sulfide, total [as S]DAILY AV <= .34 lb/d all year
001Sulfide, total [as S]DAILY MX <= .68 lb/d all year
001Copper, total [as Cu]DAILY AV <= .024 mg/L all year
001Copper, total [as Cu]DAILY MX <= .051 mg/L all year
001Copper, total [as Cu]DAILY AV <= .39 lb/d all year
001Copper, total [as Cu]DAILY MX <= .82 lb/d all year
001Zinc, total [as Zn]DAILY AV <= .24 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .52 mg/L all year
001Zinc, total [as Zn]DAILY AV <= 4.09 lb/d all year
001Zinc, total [as Zn]DAILY MX <= 8.68 lb/d all year
001Carbon tetrachlorideDAILY AV <= .045 lb/d all year
001Carbon tetrachlorideDAILY MX <= .095 lb/d all year
0011,2-DichloroethaneDAILY AV <= .171 lb/d all year
0011,2-DichloroethaneDAILY MX <= .529 lb/d all year
001ChloroformDAILY AV <= .053 lb/d all year
001ChloroformDAILY MX <= .115 lb/d all year
001TolueneDAILY AV <= .065 lb/d all year
001TolueneDAILY MX <= .201 lb/d all year
001BenzeneDAILY AV <= .093 lb/d all year
001BenzeneDAILY MX <= .341 lb/d all year
001AcenaphthyleneDAILY AV <= .055 lb/d all year
001AcenaphthyleneDAILY MX <= .148 lb/d all year
001AcenaphtheneDAILY AV <= .055 lb/d all year
001AcenaphtheneDAILY MX <= .148 lb/d all year
001AcrylonitrileDAILY AV <= .241 lb/d all year
001AcrylonitrileDAILY MX <= .607 lb/d all year
001AnthraceneDAILY AV <= .055 lb/d all year
001AnthraceneDAILY MX <= .148 lb/d all year
001Benzo[b]fluorantheneDAILY AV <= .058 lb/d all year
001Benzo[b]fluorantheneDAILY MX <= .153 lb/d all year
001Benzo[k]fluorantheneDAILY AV <= .055 lb/d all year
001Benzo[k]fluorantheneDAILY MX <= .148 lb/d all year
001Benzo[a]pyreneDAILY AV <= .0854 ug/L all year
001Benzo[a]pyreneDAILY MX <= .18 ug/L all year
001Benzo[a]pyreneDAILY AV <= .0014 lb/d all year
001Benzo[a]pyreneDAILY MX <= .003 lb/d all year
001ChlorobenzeneDAILY AV <= .038 lb/d all year
001ChlorobenzeneDAILY MX <= .07 lb/d all year
001ChryseneDAILY AV <= .055 lb/d all year
001ChryseneDAILY MX <= .148 lb/d all year
001Diethyl phthalateDAILY AV <= .203 lb/d all year
001Diethyl phthalateDAILY MX <= .509 lb/d all year
001Dimethyl phthalateDAILY AV <= .048 lb/d all year
001Dimethyl phthalateDAILY MX <= .118 lb/d all year
001EthylbenzeneDAILY AV <= .08 lb/d all year
001EthylbenzeneDAILY MX <= .271 lb/d all year
001FluorantheneDAILY AV <= .063 lb/d all year
001FluorantheneDAILY MX <= .171 lb/d all year
001FluoreneDAILY AV <= .055 lb/d all year
001FluoreneDAILY MX <= .148 lb/d all year
001HexachlorobutadieneDAILY AV <= .05 lb/d all year
001HexachlorobutadieneDAILY MX <= .123 lb/d all year
001HexachloroethaneDAILY AV <= .053 lb/d all year
001HexachloroethaneDAILY MX <= .135 lb/d all year
001Methyl chloride [Chloromethane]DAILY AV <= .216 lb/d all year
001Methyl chloride [Chloromethane]DAILY MX <= .477 lb/d all year
001Methylene chlorideDAILY AV <= .1 lb/d all year
001Methylene chlorideDAILY MX <= .223 lb/d all year
001NitrobenzeneDAILY AV <= .068 lb/d all year
001NitrobenzeneDAILY MX <= .171 lb/d all year
001PhenanthreneDAILY AV <= .055 lb/d all year
001PhenanthreneDAILY MX <= .148 lb/d all year
001PyreneDAILY AV <= .063 lb/d all year
001PyreneDAILY MX <= .168 lb/d all year
001TetrachloroethyleneDAILY AV <= .055 lb/d all year
001TetrachloroethyleneDAILY MX <= .14 lb/d all year
0011,1-DichloroethaneDAILY AV <= .055 lb/d all year
0011,1-DichloroethaneDAILY MX <= .148 lb/d all year
0011,1-DichloroethyleneDAILY AV <= .04 lb/d all year
0011,1-DichloroethyleneDAILY MX <= .063 lb/d all year
0011,1,1-TrichloroethaneDAILY AV <= .053 lb/d all year
0011,1,1-TrichloroethaneDAILY MX <= .135 lb/d all year
0011,1,2-TrichloroethaneDAILY AV <= .053 lb/d all year
0011,1,2-TrichloroethaneDAILY MX <= .135 lb/d all year
001Benzo[a]anthraceneDAILY AV <= .854 ug/L all year
001Benzo[a]anthraceneDAILY MX <= 1.8 ug/L all year
001Benzo[a]anthraceneDAILY AV <= .014 lb/d all year
001Benzo[a]anthraceneDAILY MX <= .03 lb/d all year
0011,2-DichlorobenzeneDAILY AV <= .193 lb/d all year
0011,2-DichlorobenzeneDAILY MX <= .409 lb/d all year
0011,2-DichloropropaneDAILY AV <= .384 lb/d all year
0011,2-DichloropropaneDAILY MX <= .577 lb/d all year
001trans-1,2-DichloroethyleneDAILY AV <= .053 lb/d all year
001trans-1,2-DichloroethyleneDAILY MX <= .135 lb/d all year
0011,2,4-TrichlorobenzeneDAILY AV <= .171 lb/d all year
0011,2,4-TrichlorobenzeneDAILY MX <= .351 lb/d all year
0011,3-DichlorobenzeneDAILY AV <= .078 lb/d all year
0011,3-DichlorobenzeneDAILY MX <= .11 lb/d all year
0011,4-DichlorobenzeneDAILY AV <= .038 lb/d all year
0011,4-DichlorobenzeneDAILY MX <= .07 lb/d all year
0012-ChlorophenolDAILY AV <= .078 lb/d all year
0012-ChlorophenolDAILY MX <= .246 lb/d all year
0012-NitrophenolDAILY AV <= .103 lb/d all year
0012-NitrophenolDAILY MX <= .173 lb/d all year
0012,4-DichlorophenolDAILY AV <= .098 lb/d all year
0012,4-DichlorophenolDAILY MX <= .281 lb/d all year
0012,4-DimethylphenolDAILY AV <= .045 lb/d all year
0012,4-DimethylphenolDAILY MX <= .09 lb/d all year
0012,4-DinitrotolueneDAILY AV <= .283 lb/d all year
0012,4-DinitrotolueneDAILY MX <= .715 lb/d all year
0012,4-DinitrophenolDAILY AV <= .178 lb/d all year
0012,4-DinitrophenolDAILY MX <= .309 lb/d all year
0012,6-DinitrotolueneDAILY AV <= .64 lb/d all year
0012,6-DinitrotolueneDAILY MX <= 1.608 lb/d all year
0014-NitrophenolDAILY AV <= .181 lb/d all year
0014-NitrophenolDAILY MX <= .311 lb/d all year
0014,6-Dinitro-o-cresolDAILY AV <= .196 lb/d all year
0014,6-Dinitro-o-cresolDAILY MX <= .695 lb/d all year
001PhenolDAILY AV <= .038 lb/d all year
001PhenolDAILY MX <= .065 lb/d all year
001NaphthaleneDAILY AV <= .055 lb/d all year
001NaphthaleneDAILY MX <= .148 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= .258 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .7 lb/d all year
001Di-n-butyl phthalateDAILY AV <= .068 lb/d all year
001Di-n-butyl phthalateDAILY MX <= .143 lb/d all year
001Vinyl chlorideDAILY AV <= .261 lb/d all year
001Vinyl chlorideDAILY MX <= .672 lb/d all year
001TrichloroethyleneDAILY AV <= .053 lb/d all year
001TrichloroethyleneDAILY MX <= .135 lb/d all year
001HexachlorobenzeneDAILY AV <= .0232 ug/L all year
001HexachlorobenzeneDAILY MX <= .0491 ug/L all year
001HexachlorobenzeneDAILY AV <= .00039 lb/d all year
001HexachlorobenzeneDAILY MX <= .00082 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= 2 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 3 MGD all year
001Chlorine, total residualDAILY MX <= .2 mg/L all year
0011,3-DichloropropyleneDAILY AV <= .073 lb/d all year
0011,3-DichloropropyleneDAILY MX <= .11 lb/d all year
001Cyanide, free availableDAILY AV <= .0088 mg/L all year
001Cyanide, free availableDAILY MX <= .018 mg/L all year
001Cyanide, free availableDAILY AV <= .15 lb/d all year
001Cyanide, free availableDAILY MX <= .31 lb/d all year
001EnterococciDAILY AV <= 35 CFU/100mL all year
001EnterococciDAILY MX <= 130 CFU/100mL all year
001BOD, carbonaceous [5 day, 20 C]DAILY AV <= 155 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 406 lb/d all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
001ChloroethaneDAILY AV <= .261 lb/d all year
001ChloroethaneDAILY MX <= .672 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
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9.5 SU all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Carbon, tot organic [TOC]DAILY MX <= 55 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
101pHMINIMUM >= 6 SU all year
101pHMAXIMUM <= 9 SU all year
101Solids, total suspendedDAILY MX <= 65 mg/L all year
101Oil & GreaseDAILY MX <= 15 mg/L all year
101Iron, total [as Fe]DAILY MX <= 1.3 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
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
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
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