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Equistar Chemicals, LP

Industrial Organic Chemicals, major discharger, Corpus Christi, Texas. NPDES permit TX0076996 expired Aug 11, 2026; its limits still apply. Last 12 months: over a limit 3 times (last June 2026), 1 of 54 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (36 values), outfall 002 form A monthly (6 values), outfall 003 form A monthly (6 values), outfall 101 form A monthly (7 values), outfall 001 form Q quarterly, outfall 001 form Y yearly, and 3 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 116 required values missing, 1 of 58 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
November 2025001Enterococci, daily average> 2419.6 CFU/100mL≤ 35 CFU/100mL—
November 2025001Enterococci, daily maximum> 2419.6 CFU/100mL≤ 130 CFU/100mL—
June 2026002Carbon, tot organic [TOC], daily maximum68.5 mg/L≤ 55 mg/L25%

Limits in force (203)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximum≤ 105 deg Fall year001
Oxygen demand, chem. [high level] [COD]daily average≤ 1306 lb/dall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 1749 lb/dall year001
pHminimum≥ 5 SUall year001
pHmaximum≤ 11 SUall year001
Solids, total suspendeddaily average≤ 287 lb/dall year001
Solids, total suspendeddaily maximum≤ 755 lb/dall year001
Oil & Greasedaily average≤ 45 lb/dall year001
Oil & Greasedaily maximum≤ 68 lb/dall year001
Nitrogen, ammonia total [as N]daily average≤ 45 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 68 lb/dall year001
Cyanide, free [amenable to chlorination]daily average≤ .0088 mg/Lall year001
Cyanide, free [amenable to chlorination]daily maximum≤ .019 mg/Lall year001
Cyanide, free [amenable to chlorination]daily average≤ .12 lb/dall year001
Cyanide, free [amenable to chlorination]daily maximum≤ .25 lb/dall year001
Sulfide, total [as S]daily average≤ .34 lb/dall year001
Sulfide, total [as S]daily maximum≤ .68 lb/dall year001
Copper, total [as Cu]daily average≤ .024 mg/Lall year001
Copper, total [as Cu]daily maximum≤ .051 mg/Lall year001
Copper, total [as Cu]daily average≤ .39 lb/dall year001
Copper, total [as Cu]daily maximum≤ .82 lb/dall year001
Zinc, total [as Zn]daily average≤ .24 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ .52 mg/Lall year001
Zinc, total [as Zn]daily average≤ 4.09 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 8.68 lb/dall year001
Carbon tetrachloridedaily average≤ .045 lb/dall year001
Carbon tetrachloridedaily maximum≤ .095 lb/dall year001
1,2-Dichloroethanedaily average≤ .171 lb/dall year001
1,2-Dichloroethanedaily maximum≤ .529 lb/dall year001
Chloroformdaily average≤ .053 lb/dall year001
Chloroformdaily maximum≤ .115 lb/dall year001
Toluenedaily average≤ .065 lb/dall year001
Toluenedaily maximum≤ .201 lb/dall year001
Benzenedaily average≤ .093 lb/dall year001
Benzenedaily maximum≤ .341 lb/dall year001
Acenaphthylenedaily average≤ .055 lb/dall year001
Acenaphthylenedaily maximum≤ .148 lb/dall year001
Acenaphthenedaily average≤ .055 lb/dall year001
Acenaphthenedaily maximum≤ .148 lb/dall year001
Acrylonitriledaily average≤ .241 lb/dall year001
Acrylonitriledaily maximum≤ .607 lb/dall year001
Anthracenedaily average≤ .055 lb/dall year001
Anthracenedaily maximum≤ .148 lb/dall year001
Benzo[b]fluoranthenedaily average≤ .058 lb/dall year001
Benzo[b]fluoranthenedaily maximum≤ .153 lb/dall year001
Benzo[k]fluoranthenedaily average≤ .055 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ .148 lb/dall year001
Benzo[a]pyrenedaily average≤ .0854 ug/Lall year001
Benzo[a]pyrenedaily maximum≤ .18 ug/Lall year001
Benzo[a]pyrenedaily average≤ .0014 lb/dall year001
Benzo[a]pyrenedaily maximum≤ .003 lb/dall year001
Chlorobenzenedaily average≤ .038 lb/dall year001
Chlorobenzenedaily maximum≤ .07 lb/dall year001
Chrysenedaily average≤ .055 lb/dall year001
Chrysenedaily maximum≤ .148 lb/dall year001
Diethyl phthalatedaily average≤ .203 lb/dall year001
Diethyl phthalatedaily maximum≤ .509 lb/dall year001
Dimethyl phthalatedaily average≤ .048 lb/dall year001
Dimethyl phthalatedaily maximum≤ .118 lb/dall year001
Ethylbenzenedaily average≤ .08 lb/dall year001
Ethylbenzenedaily maximum≤ .271 lb/dall year001
Fluoranthenedaily average≤ .063 lb/dall year001
Fluoranthenedaily maximum≤ .171 lb/dall year001
Fluorenedaily average≤ .055 lb/dall year001
Fluorenedaily maximum≤ .148 lb/dall year001
Hexachlorobutadienedaily average≤ .05 lb/dall year001
Hexachlorobutadienedaily maximum≤ .123 lb/dall year001
Hexachloroethanedaily average≤ .053 lb/dall year001
Hexachloroethanedaily maximum≤ .135 lb/dall year001
Methyl chloride [Chloromethane]daily average≤ .216 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ .477 lb/dall year001
Methylene chloridedaily average≤ .1 lb/dall year001
Methylene chloridedaily maximum≤ .223 lb/dall year001
Nitrobenzenedaily average≤ .068 lb/dall year001
Nitrobenzenedaily maximum≤ .171 lb/dall year001
Phenanthrenedaily average≤ .055 lb/dall year001
Phenanthrenedaily maximum≤ .148 lb/dall year001
Pyrenedaily average≤ .063 lb/dall year001
Pyrenedaily maximum≤ .168 lb/dall year001
Tetrachloroethylenedaily average≤ .055 lb/dall year001
Tetrachloroethylenedaily maximum≤ .14 lb/dall year001
1,1-Dichloroethanedaily average≤ .055 lb/dall year001
1,1-Dichloroethanedaily maximum≤ .148 lb/dall year001
1,1-Dichloroethylenedaily average≤ .04 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ .063 lb/dall year001
1,1,1-Trichloroethanedaily average≤ .053 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ .135 lb/dall year001
1,1,2-Trichloroethanedaily average≤ .053 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ .135 lb/dall year001
Benzo[a]anthracenedaily average≤ .854 ug/Lall year001
Benzo[a]anthracenedaily maximum≤ 1.8 ug/Lall year001
Benzo[a]anthracenedaily average≤ .014 lb/dall year001
Benzo[a]anthracenedaily maximum≤ .03 lb/dall year001
1,2-Dichlorobenzenedaily average≤ .193 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ .409 lb/dall year001
1,2-Dichloropropanedaily average≤ .384 lb/dall year001
1,2-Dichloropropanedaily maximum≤ .577 lb/dall year001
trans-1,2-Dichloroethylenedaily average≤ .053 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ .135 lb/dall year001
1,2,4-Trichlorobenzenedaily average≤ .171 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ .351 lb/dall year001
1,3-Dichlorobenzenedaily average≤ .078 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ .11 lb/dall year001
1,4-Dichlorobenzenedaily average≤ .038 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ .07 lb/dall year001
2-Chlorophenoldaily average≤ .078 lb/dall year001
2-Chlorophenoldaily maximum≤ .246 lb/dall year001
2-Nitrophenoldaily average≤ .103 lb/dall year001
2-Nitrophenoldaily maximum≤ .173 lb/dall year001
2,4-Dichlorophenoldaily average≤ .098 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ .281 lb/dall year001
2,4-Dimethylphenoldaily average≤ .045 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ .09 lb/dall year001
2,4-Dinitrotoluenedaily average≤ .283 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ .715 lb/dall year001
2,4-Dinitrophenoldaily average≤ .178 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ .309 lb/dall year001
2,6-Dinitrotoluenedaily average≤ .64 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ 1.608 lb/dall year001
4-Nitrophenoldaily average≤ .181 lb/dall year001
4-Nitrophenoldaily maximum≤ .311 lb/dall year001
4,6-Dinitro-o-cresoldaily average≤ .196 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ .695 lb/dall year001
Phenoldaily average≤ .038 lb/dall year001
Phenoldaily maximum≤ .065 lb/dall year001
Naphthalenedaily average≤ .055 lb/dall year001
Naphthalenedaily maximum≤ .148 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily average≤ .258 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ .7 lb/dall year001
Di-n-butyl phthalatedaily average≤ .068 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ .143 lb/dall year001
Vinyl chloridedaily average≤ .261 lb/dall year001
Vinyl chloridedaily maximum≤ .672 lb/dall year001
Trichloroethylenedaily average≤ .053 lb/dall year001
Trichloroethylenedaily maximum≤ .135 lb/dall year001
Hexachlorobenzenedaily average≤ .0232 ug/Lall year001
Hexachlorobenzenedaily maximum≤ .0491 ug/Lall year001
Hexachlorobenzenedaily average≤ .00039 lb/dall year001
Hexachlorobenzenedaily maximum≤ .00082 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ 2 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ 3 MGDall year001
Chlorine, total residualdaily maximum≤ .2 mg/Lall year001
1,3-Dichloropropylenedaily average≤ .073 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ .11 lb/dall year001
Cyanide, free availabledaily average≤ .0088 mg/Lall year001
Cyanide, free availabledaily maximum≤ .018 mg/Lall year001
Cyanide, free availabledaily average≤ .15 lb/dall year001
Cyanide, free availabledaily maximum≤ .31 lb/dall year001
Enterococcidaily average≤ 35 CFU/100mLall year001
Enterococcidaily maximum≤ 130 CFU/100mLall year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 155 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 406 lb/dall year001
pH range excursions, > 60 minutesmonthly total≤ 0 occur/moall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
Chloroethanedaily average≤ .261 lb/dall year001
Chloroethanedaily maximum≤ .672 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
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
pHminimum≥ 6 SUall year003
pHmaximum≤ 9.5 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year003
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHminimum≥ 6 SUall year101
pHmaximum≤ 9 SUall year101
Solids, total suspendeddaily maximum≤ 65 mg/Lall year101
Oil & Greasedaily maximum≤ 15 mg/Lall year101
Iron, total [as Fe]daily maximum≤ 1.3 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
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
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly 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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