EQUISTAR CHEMICALS, LP

NPDES permit IA0000191 · Major NON-POTW · effective, expires 2029-06-30 · 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
2required values missing, on 1 form(s)
0of 24 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (265)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 12 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 31 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 187 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 496 lb/d all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHDAILY MN >= 6.4 SU all year
001pHDAILY MX <= 9 SU all year
001pH30DA AVG report only all year
001pHDAILY MX report only all year
001Solids, total suspended30DA AVG <= 18 mg/L all year
001Solids, total suspendedDAILY MX <= 57 mg/L all year
001Solids, total suspended30DA AVG <= 283 lb/d all year
001Solids, total suspendedDAILY MX <= 905 lb/d all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Polynuclear Aromatic Hydrocarbons [PAHs]30DA AVG <= .0074 mg/L all year
001Polynuclear Aromatic Hydrocarbons [PAHs]DAILY MX <= .0395 mg/L all year
001Polynuclear Aromatic Hydrocarbons [PAHs]30DA AVG <= .187 lb/d all year
001Polynuclear Aromatic Hydrocarbons [PAHs]DAILY MX <= .876 lb/d all year
001Carbon tetrachloride30DA AVG <= .0074 mg/L all year
001Carbon tetrachlorideDAILY MX <= .0156 mg/L all year
001Carbon tetrachloride30DA AVG <= .117 lb/d all year
001Carbon tetrachlorideDAILY MX <= .246 lb/d all year
0011,2-Dichloroethane30DA AVG <= .028 mg/L all year
0011,2-DichloroethaneDAILY MX <= .0867 mg/L all year
0011,2-Dichloroethane30DA AVG <= .441 lb/d all year
0011,2-DichloroethaneDAILY MX <= 1.37 lb/d all year
001Chloroform30DA AVG <= .0086 mg/L all year
001ChloroformDAILY MX <= .0189 mg/L all year
001Chloroform30DA AVG <= .136 lb/d all year
001ChloroformDAILY MX <= .298 lb/d all year
001Toluene30DA AVG <= .0107 mg/L all year
001TolueneDAILY MX <= .0329 mg/L all year
001Toluene30DA AVG <= .168 lb/d all year
001TolueneDAILY MX <= .518 lb/d all year
001Benzene30DA AVG <= .0152 mg/L all year
001BenzeneDAILY MX <= .0559 mg/L all year
001Benzene30DA AVG <= .24 lb/d all year
001BenzeneDAILY MX <= .881 lb/d all year
001Acenaphthylene30DA AVG <= .009 mg/L all year
001AcenaphthyleneDAILY MX <= .0243 mg/L all year
001Acenaphthylene30DA AVG <= .143 lb/d all year
001AcenaphthyleneDAILY MX <= .382 lb/d all year
001Acenaphthene30DA AVG <= .009 mg/L all year
001AcenaphtheneDAILY MX <= .0243 mg/L all year
001Acenaphthene30DA AVG <= .143 lb/d all year
001AcenaphtheneDAILY MX <= .382 lb/d all year
001Acrylonitrile30DA AVG <= .0395 mg/L all year
001AcrylonitrileDAILY MX <= .0995 mg/L all year
001Acrylonitrile30DA AVG <= .622 lb/d all year
001AcrylonitrileDAILY MX <= 1.57 lb/d all year
001Anthracene30DA AVG <= .009 mg/L all year
001AnthraceneDAILY MX <= .0243 mg/L all year
001Anthracene30DA AVG <= .143 lb/d all year
001AnthraceneDAILY MX <= .382 lb/d all year
001Benzo[b]fluoranthene30DA AVG <= .0095 mg/L all year
001Benzo[b]fluorantheneDAILY MX <= .0251 mg/L all year
001Benzo[b]fluoranthene30DA AVG <= .149 lb/d all year
001Benzo[b]fluorantheneDAILY MX <= .395 lb/d all year
001Benzo[k]fluoranthene30DA AVG <= .009 mg/L all year
001Benzo[k]fluorantheneDAILY MX <= .0243 mg/L all year
001Benzo[k]fluoranthene30DA AVG <= .143 lb/d all year
001Benzo[k]fluorantheneDAILY MX <= .382 lb/d all year
001Benzo[a]pyrene30DA AVG <= .004732 mg/L all year
001Benzo[a]pyreneDAILY MX <= .004732 mg/L all year
001Benzo[a]pyrene30DA AVG <= .06979 lb/d all year
001Benzo[a]pyreneDAILY MX <= .06979 lb/d all year
001Chlorobenzene30DA AVG <= .0062 mg/L all year
001ChlorobenzeneDAILY MX <= .0115 mg/L all year
001Chlorobenzene30DA AVG <= .097 lb/d all year
001ChlorobenzeneDAILY MX <= .181 lb/d all year
001Chrysene30DA AVG <= .009 mg/L all year
001ChryseneDAILY MX <= .0243 mg/L all year
001Chrysene30DA AVG <= .143 lb/d all year
001ChryseneDAILY MX <= .382 lb/d all year
001Diethyl phthalate30DA AVG <= .0333 mg/L all year
001Diethyl phthalateDAILY MX <= .0835 mg/L all year
001Diethyl phthalate30DA AVG <= .525 lb/d all year
001Diethyl phthalateDAILY MX <= 1.32 lb/d all year
001Dimethyl phthalate30DA AVG <= .0078 mg/L all year
001Dimethyl phthalateDAILY MX <= .0193 mg/L all year
001Dimethyl phthalate30DA AVG <= .123 lb/d all year
001Dimethyl phthalateDAILY MX <= .305 lb/d all year
001Ethylbenzene30DA AVG <= .0132 mg/L all year
001EthylbenzeneDAILY MX <= .0444 mg/L all year
001Ethylbenzene30DA AVG <= .207 lb/d all year
001EthylbenzeneDAILY MX <= .7 lb/d all year
001Fluoranthene30DA AVG <= .0103 mg/L all year
001FluorantheneDAILY MX <= .028 mg/L all year
001Fluoranthene30DA AVG <= .162 lb/d all year
001FluorantheneDAILY MX <= .441 lb/d all year
001Fluorene30DA AVG <= .009 mg/L all year
001FluoreneDAILY MX <= .0243 mg/L all year
001Fluorene30DA AVG <= .143 lb/d all year
001FluoreneDAILY MX <= .382 lb/d all year
001Hexachloroethane30DA AVG <= .0086 mg/L all year
001HexachloroethaneDAILY MX <= .0222 mg/L all year
001Hexachloroethane30DA AVG <= .136 lb/d all year
001HexachloroethaneDAILY MX <= .35 lb/d all year
001Methyl chloride [Chloromethane]30DA AVG <= .0354 mg/L all year
001Methyl chloride [Chloromethane]DAILY MX <= .0781 mg/L all year
001Methyl chloride [Chloromethane]30DA AVG <= .557 lb/d all year
001Methyl chloride [Chloromethane]DAILY MX <= 1.23 lb/d all year
001Methylene chloride30DA AVG <= .0164 mg/L all year
001Methylene chlorideDAILY MX <= .0366 mg/L all year
001Methylene chloride30DA AVG <= .259 lb/d all year
001Methylene chlorideDAILY MX <= .577 lb/d all year
001Nitrobenzene30DA AVG <= .0111 mg/L all year
001NitrobenzeneDAILY MX <= .028 mg/L all year
001Nitrobenzene30DA AVG <= .175 lb/d all year
001NitrobenzeneDAILY MX <= .441 lb/d all year
001Phenanthrene30DA AVG <= .009 mg/L all year
001PhenanthreneDAILY MX <= .0243 mg/L all year
001Phenanthrene30DA AVG <= .143 lb/d all year
001PhenanthreneDAILY MX <= .382 lb/d all year
001Pyrene30DA AVG <= .0103 mg/L all year
001PyreneDAILY MX <= .0275 mg/L all year
001Pyrene30DA AVG <= .162 lb/d all year
001PyreneDAILY MX <= .434 lb/d all year
0011,1-Dichloroethane30DA AVG <= .009 mg/L all year
0011,1-DichloroethaneDAILY MX <= .0243 mg/L all year
0011,1-Dichloroethane30DA AVG <= .143 lb/d all year
0011,1-DichloroethaneDAILY MX <= .382 lb/d all year
0011,1-Dichloroethylene30DA AVG <= .0066 mg/L all year
0011,1-DichloroethyleneDAILY MX <= .0103 mg/L all year
0011,1-Dichloroethylene30DA AVG <= .104 lb/d all year
0011,1-DichloroethyleneDAILY MX <= .162 lb/d all year
0011,1,1-Trichloroethane30DA AVG <= .0086 mg/L all year
0011,1,1-TrichloroethaneDAILY MX <= .0222 mg/L all year
0011,1,1-Trichloroethane30DA AVG <= .136 lb/d all year
0011,1,1-TrichloroethaneDAILY MX <= .35 lb/d all year
0011,1,2-Trichloroethane30DA AVG <= .0086 mg/L all year
0011,1,2-TrichloroethaneDAILY MX <= .0222 mg/L all year
0011,1,2-Trichloroethane30DA AVG <= .136 lb/d all year
0011,1,2-TrichloroethaneDAILY MX <= .35 lb/d all year
001Benzo[a]anthracene30DA AVG <= .009 mg/L all year
001Benzo[a]anthraceneDAILY MX <= .0243 mg/L all year
001Benzo[a]anthracene30DA AVG <= .143 lb/d all year
001Benzo[a]anthraceneDAILY MX <= .382 lb/d all year
0011,2-Dichlorobenzene30DA AVG <= .0317 mg/L all year
0011,2-DichlorobenzeneDAILY MX <= .067 mg/L all year
0011,2-Dichlorobenzene30DA AVG <= .499 lb/d all year
0011,2-DichlorobenzeneDAILY MX <= .106 lb/d all year
0011,2-Dichloropropane30DA AVG <= .0629 mg/L all year
0011,2-DichloropropaneDAILY MX <= .0946 mg/L all year
0011,2-Dichloropropane30DA AVG <= .991 lb/d all year
0011,2-DichloropropaneDAILY MX <= 1.49 lb/d all year
001trans-1,2-Dichloroethylene30DA AVG <= .0086 mg/L all year
001trans-1,2-DichloroethyleneDAILY MX <= .0222 mg/L all year
001trans-1,2-Dichloroethylene30DA AVG <= .136 lb/d all year
001trans-1,2-DichloroethyleneDAILY MX <= .35 lb/d all year
0011,2,4-Trichlorobenzene30DA AVG <= .028 mg/L all year
0011,2,4-TrichlorobenzeneDAILY MX <= .0576 mg/L all year
0011,2,4-Trichlorobenzene30DA AVG <= .441 lb/d all year
0011,2,4-TrichlorobenzeneDAILY MX <= .907 lb/d all year
0011,3-Dichlorobenzene30DA AVG <= .0127 mg/L all year
0011,3-DichlorobenzeneDAILY MX <= .0181 mg/L all year
0011,3-Dichlorobenzene30DA AVG <= .201 lb/d all year
0011,3-DichlorobenzeneDAILY MX <= .285 lb/d all year
0011,4-Dichlorobenzene30DA AVG <= .0062 mg/L all year
0011,4-DichlorobenzeneDAILY MX <= .0115 mg/L all year
0011,4-Dichlorobenzene30DA AVG <= .097 lb/d all year
0011,4-DichlorobenzeneDAILY MX <= .181 lb/d all year
0012-Chlorophenol30DA AVG <= .0127 mg/L all year
0012-ChlorophenolDAILY MX <= .0403 mg/L all year
0012-Chlorophenol30DA AVG <= .201 lb/d all year
0012-ChlorophenolDAILY MX <= .635 lb/d all year
0012-Nitrophenol30DA AVG <= .0169 mg/L all year
0012-NitrophenolDAILY MX <= .0284 mg/L all year
0012-Nitrophenol30DA AVG <= .266 lb/d all year
0012-NitrophenolDAILY MX <= .447 lb/d all year
0012,4-Dichlorophenol30DA AVG <= .016 mg/L all year
0012,4-DichlorophenolDAILY MX <= .046 mg/L all year
0012,4-Dichlorophenol30DA AVG <= .253 lb/d all year
0012,4-DichlorophenolDAILY MX <= .726 lb/d all year
0012,4-Dimethylphenol30DA AVG <= .0074 mg/L all year
0012,4-DimethylphenolDAILY MX <= .0148 mg/L all year
0012,4-Dimethylphenol30DA AVG <= .117 lb/d all year
0012,4-DimethylphenolDAILY MX <= .233 lb/d all year
0012,4-Dinitrotoluene30DA AVG <= .0465 mg/L all year
0012,4-DinitrotolueneDAILY MX <= .117 mg/L all year
0012,4-Dinitrotoluene30DA AVG <= .732 lb/d all year
0012,4-DinitrotolueneDAILY MX <= 1.85 lb/d all year
0012,4-Dinitrophenol30DA AVG <= .0292 mg/L all year
0012,4-DinitrophenolDAILY MX <= .0506 mg/L all year
0012,4-Dinitrophenol30DA AVG <= .46 lb/d all year
0012,4-DinitrophenolDAILY MX <= .797 lb/d all year
0012,6-Dinitrotoluene30DA AVG <= .105 mg/L all year
0012,6-DinitrotolueneDAILY MX <= .264 mg/L all year
0012,6-Dinitrotoluene30DA AVG <= 1.65 lb/d all year
0012,6-DinitrotolueneDAILY MX <= 4.15 lb/d all year
0014-Nitrophenol30DA AVG <= .0296 mg/L all year
0014-NitrophenolDAILY MX <= .051 mg/L all year
0014-Nitrophenol30DA AVG <= .467 lb/d all year
0014-NitrophenolDAILY MX <= .804 lb/d all year
0014,6-Dinitro-o-cresol30DA AVG <= .0321 mg/L all year
0014,6-Dinitro-o-cresolDAILY MX <= .114 mg/L all year
0014,6-Dinitro-o-cresol30DA AVG <= .505 lb/d all year
0014,6-Dinitro-o-cresolDAILY MX <= 1.8 lb/d all year
001Phenol30DA AVG <= .0062 mg/L all year
001PhenolDAILY MX <= .0107 mg/L all year
001Phenol30DA AVG <= .097 lb/d all year
001PhenolDAILY MX <= .168 lb/d all year
001Naphthalene30DA AVG <= .009 mg/L all year
001NaphthaleneDAILY MX <= .0243 mg/L all year
001Naphthalene30DA AVG <= .143 lb/d all year
001NaphthaleneDAILY MX <= .382 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= .0423 mg/L all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .115 mg/L all year
001Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= .667 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 1.81 lb/d all year
001Di-n-butyl phthalate30DA AVG <= .0111 mg/L all year
001Di-n-butyl phthalateDAILY MX <= .0234 mg/L all year
001Di-n-butyl phthalate30DA AVG <= .175 lb/d all year
001Di-n-butyl phthalateDAILY MX <= .369 lb/d all year
001Vinyl chloride30DA AVG <= .0428 mg/L all year
001Vinyl chlorideDAILY MX <= .11 mg/L all year
001Vinyl chloride30DA AVG <= .674 lb/d all year
001Vinyl chlorideDAILY MX <= 1.74 lb/d all year
001Hexachlorobenzene30DA AVG <= .0000762 mg/L all year
001HexachlorobenzeneDAILY MX <= .0000762 mg/L all year
001Hexachlorobenzene30DA AVG <= .001124 lb/d all year
001HexachlorobenzeneDAILY MX <= .001124 lb/d all year
001Hexachlorobutadiene30DA AVG <= .0082 mg/L all year
001HexachlorobutadieneDAILY MX <= .0201 mg/L all year
001Hexachlorobutadiene30DA AVG <= .13 lb/d all year
001HexachlorobutadieneDAILY MX <= .318 lb/d all year
001E. coliGEO MEAN <= 126 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
0011,3-Dichloropropylene30DA AVG <= .0119 mg/L all year
0011,3-DichloropropyleneDAILY MX <= .0181 mg/L all year
0011,3-Dichloropropylene30DA AVG <= .188 lb/d all year
0011,3-DichloropropyleneDAILY MX <= .285 lb/d all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX <= 1 N=0;Y=1 all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX <= 1 N=0;Y=1 all year
001Tetrachloroethene30DA AVG <= .009 mg/L all year
001TetrachloroetheneDAILY MX <= .023 mg/L all year
001Tetrachloroethene30DA AVG <= .143 lb/d all year
001TetrachloroetheneDAILY MX <= .363 lb/d all year
001Trichloroethene30DA AVG <= .0086 mg/L all year
001TrichloroetheneDAILY MX <= .0222 mg/L all year
001Trichloroethene30DA AVG <= .136 lb/d all year
001TrichloroetheneDAILY MX <= .35 lb/d all year
001Chloroethane30DA AVG <= .0428 mg/L all year
001ChloroethaneDAILY MX <= .11 mg/L all year
001Chloroethane30DA AVG <= .674 lb/d all year
001ChloroethaneDAILY MX <= 1.74 lb/d all year
008Chromium, total [as Cr]30DA AVG <= .032 lb/d all year
008Chromium, total [as Cr]DAILY MX <= .079 lb/d 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