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Equistar Chemicals, LP

Plastics Materials And Resins, major discharger, Bay City, Texas. NPDES permit TX0087173 expired Mar 23, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (13 values), outfall 001 form Q quarterly (5 values), outfall 002 form A monthly (10 values), outfall 101 form A monthly (11 values), outfall 201 form A monthly (7 values), outfall 001 form Y yearly, and 3 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 58 reports late

Limits in force (190)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily average≤ 119 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 289 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily average≤ 262 lb/dall year001
Solids, total suspendeddaily maximum≤ 672 lb/dall year001
Oil & Greasedaily average≤ 60 lb/dall year001
Oil & Greasedaily maximum≤ 91 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 36 lb/dall year001
Carbon, tot organic [TOC]daily average≤ 450 lb/dall year001
Carbon, tot organic [TOC]daily maximum≤ 902 lb/dall year001
Carbon tetrachloridedaily average≤ .02 lb/dall year001
Carbon tetrachloridedaily maximum≤ .03 lb/dall year001
1,2-Dichloroethanedaily average≤ .06 lb/dall year001
1,2-Dichloroethanedaily maximum≤ .19 lb/dall year001
Chloroformdaily average≤ .531 lb/dall year001
Chloroformdaily maximum≤ 1.55 lb/dall year001
Toluenedaily average≤ .02 lb/dall year001
Toluenedaily maximum≤ .07 lb/dall year001
Benzenedaily average≤ .03 lb/dall year001
Benzenedaily maximum≤ .12 lb/dall year001
Acenaphthylenedaily average≤ .02 lb/dall year001
Acenaphthylenedaily maximum≤ .05 lb/dall year001
Acenaphthenedaily average≤ .02 lb/dall year001
Acenaphthenedaily maximum≤ .05 lb/dall year001
Acrylonitriledaily average≤ .09 lb/dall year001
Acrylonitriledaily maximum≤ .22 lb/dall year001
Anthracenedaily average≤ .02 lb/dall year001
Anthracenedaily maximum≤ .05 lb/dall year001
Benzo[b]fluoranthenedaily average≤ .02 lb/dall year001
Benzo[b]fluoranthenedaily maximum≤ .06 lb/dall year001
Benzo[k]fluoranthenedaily average≤ .02 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ .05 lb/dall year001
Benzo[a]pyrenedaily average≤ .00067 lb/dall year001
Benzo[a]pyrenedaily maximum≤ .00141 lb/dall year001
Chlorobenzenedaily average≤ .01 lb/dall year001
Chlorobenzenedaily maximum≤ .03 lb/dall year001
Chrysenedaily average≤ .02 lb/dall year001
Chrysenedaily maximum≤ .05 lb/dall year001
Diethyl phthalatedaily average≤ .07 lb/dall year001
Diethyl phthalatedaily maximum≤ .19 lb/dall year001
Dimethyl phthalatedaily average≤ .02 lb/dall year001
Dimethyl phthalatedaily maximum≤ .04 lb/dall year001
Ethylbenzenedaily average≤ .03 lb/dall year001
Ethylbenzenedaily maximum≤ .1 lb/dall year001
Fluoranthenedaily average≤ .02 lb/dall year001
Fluoranthenedaily maximum≤ .06 lb/dall year001
Fluorenedaily average≤ .02 lb/dall year001
Fluorenedaily maximum≤ .05 lb/dall year001
Hexachlorobutadienedaily average≤ .02 lb/dall year001
Hexachlorobutadienedaily maximum≤ .04 lb/dall year001
Hexachloroethanedaily average≤ .02 lb/dall year001
Hexachloroethanedaily maximum≤ .05 lb/dall year001
Methyl chloride [Chloromethane]daily average≤ .08 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ .17 lb/dall year001
Methylene chloridedaily average≤ .04 lb/dall year001
Methylene chloridedaily maximum≤ .08 lb/dall year001
Nitrobenzenedaily average≤ .02 lb/dall year001
Nitrobenzenedaily maximum≤ .06 lb/dall year001
Phenanthrenedaily average≤ .02 lb/dall year001
Phenanthrenedaily maximum≤ .05 lb/dall year001
Pyrenedaily average≤ .03 lb/dall year001
Pyrenedaily maximum≤ .06 lb/dall year001
Tetrachloroethylenedaily average≤ .02 lb/dall year001
Tetrachloroethylenedaily maximum≤ .05 lb/dall year001
1,1-Dichloroethanedaily average≤ .02 lb/dall year001
1,1-Dichloroethanedaily maximum≤ .05 lb/dall year001
1,1-Dichloroethylenedaily average≤ .01 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ .02 lb/dall year001
1,1,1-Trichloroethanedaily average≤ .02 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ .05 lb/dall year001
1,1,2-Trichloroethanedaily average≤ .02 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ .05 lb/dall year001
Benzo[a]anthracenedaily average≤ .0067 lb/dall year001
Benzo[a]anthracenedaily maximum≤ .0141 lb/dall year001
1,2-Dichlorobenzenedaily average≤ .07 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ .15 lb/dall year001
1,2-Dichloropropanedaily average≤ .14 lb/dall year001
1,2-Dichloropropanedaily maximum≤ .21 lb/dall year001
trans-1,2-Dichloroethylenedaily average≤ .02 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ .05 lb/dall year001
1,2,4-Trichlorobenzenedaily average≤ .06 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ .13 lb/dall year001
1,3-Dichlorobenzenedaily average≤ .03 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ .04 lb/dall year001
1,4-Dichlorobenzenedaily average≤ .01 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ .03 lb/dall year001
2-Chlorophenoldaily average≤ .03 lb/dall year001
2-Chlorophenoldaily maximum≤ .09 lb/dall year001
2-Nitrophenoldaily average≤ .04 lb/dall year001
2-Nitrophenoldaily maximum≤ .06 lb/dall year001
2,4-Dichlorophenoldaily average≤ .04 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ .1 lb/dall year001
2,4-Dimethylphenoldaily average≤ .02 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ .03 lb/dall year001
2,4-Dinitrotoluenedaily average≤ .1 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ .26 lb/dall year001
2,4-Dinitrophenoldaily average≤ .07 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ .11 lb/dall year001
2,6-Dinitrotoluenedaily average≤ .23 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ .59 lb/dall year001
4-Nitrophenoldaily average≤ .07 lb/dall year001
4-Nitrophenoldaily maximum≤ .11 lb/dall year001
4,6-Dinitro-o-cresoldaily average≤ .07 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ .25 lb/dall year001
Phenoldaily average≤ .01 lb/dall year001
Phenoldaily maximum≤ .02 lb/dall year001
Naphthalenedaily average≤ .02 lb/dall year001
Naphthalenedaily maximum≤ .05 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily average≤ .09 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ .26 lb/dall year001
Di-n-butyl phthalatedaily average≤ .02 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ .05 lb/dall year001
Vinyl chloridedaily average≤ .1 lb/dall year001
Vinyl chloridedaily maximum≤ .25 lb/dall year001
Trichloroethylenedaily average≤ .02 lb/dall year001
Trichloroethylenedaily maximum≤ .05 lb/dall year001
Hexachlorobenzenedaily average≤ .000181 lb/dall year001
Hexachlorobenzenedaily maximum≤ .000384 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ .936 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ 1.444 MGDall year001
1,3-Dichloropropylenedaily average≤ .03 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ .04 lb/dall year001
Chloroethanedaily average≤ .1 lb/dall year001
Chloroethanedaily maximum≤ .25 lb/dall year001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9.5 SUall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year002
Copper, total [as Cu]daily averagereport only (mg/L)all year002
Copper, total [as Cu]daily maximum≤ .0165 mg/Lall year002
Zinc, total [as Zn]daily averagereport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
BOD, 5-day, 20 deg. Cdaily average≤ 20 mg/Lall year101
BOD, 5-day, 20 deg. Cdaily maximum≤ 65 mg/Lall year101
pHminimum≥ 6 SUall year101
pHmaximum≤ 9 SUall year101
Solids, total suspendeddaily average≤ 20 mg/Lall year101
Solids, total suspendeddaily maximum≤ 65 mg/Lall year101
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year101
Enterococcidaily average≤ 35 CFU/100mLall year101
Enterococcidaily maximum≤ 89 CFU/100mLall year101
pHminimum≥ 6 SUall year201
pHmaximum≤ 9 SUall year201
Solids, total suspendeddaily maximum≤ 65 mg/Lall year201
Oil & Greasedaily maximum≤ 15 mg/Lall year201
Iron, total [as Fe]daily maximum≤ 1.3 mg/Lall year201
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year201
Whole effluent toxicity - retest #17-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #17-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #27-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #27-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (pass=0;fail=1)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
Whole effluent toxicity - retest #1single samplereport only (pass=0;fail=1)all yearTXA
Whole effluent toxicity - retest #2single samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)single samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Menidia menidiasingle samplereport only (pass=0;fail=1)all yearTXA

How strict are these limits?

Cited limits by parameter: Texas's rules and the federal ones.

Same industry: the 165 Chemicals and Allied Products permits in Texas.

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