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Equistar Chemicals LP

Industrial Organic Chemicals, major discharger, Channelview, Texas. NPDES permit TX0003531 expired Mar 25, 2026; its limits still apply. Last 12 months: over a limit 2 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (14 values), outfall 001 form Q quarterly (2 values), outfall 002 form A monthly (6 values), outfall 003 form Q quarterly (6 values), outfall 004 form Q quarterly (7 values), outfall 005 form Q quarterly (6 values), and 7 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 71 reports late

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

Period endingOutfallParameterReportedLimitOver by
March 2026101Enterococci, daily maximum240 MPN/100mL≤ 104 MPN/100mL131%
March 2026201Enterococci, daily maximum240 MPN/100mL≤ 104 MPN/100mL131%

Limits in force (210)

ParameterStatisticLimitMonthsOutfall
Oxygen demand, chem. [high level] [COD]daily average≤ 10101 lb/dall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 17825 lb/dall year001
pHminimum≥ 5 SUall year001
pHmaximum≤ 11 SUall year001
Solids, total suspendeddaily average≤ 2971 lb/dall year001
Solids, total suspendeddaily maximum≤ 9070 lb/dall year001
Oil & Greasedaily average≤ 595 lb/dall year001
Oil & Greasedaily maximum≤ 891 lb/dall year001
Nitrogen, ammonia total [as N]daily average≤ 217 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 434 lb/dall year001
Chromium, total [as Cr]daily average≤ 1.02 lb/dall year001
Chromium, total [as Cr]daily maximum≤ 2.54 lb/dall year001
Copper, total [as Cu]daily average≤ 1.77 lb/dall year001
Copper, total [as Cu]daily maximum≤ 3.75 lb/dall year001
Lead, total [as Pb]daily average≤ 7.84 lb/dall year001
Lead, total [as Pb]daily maximum≤ 16.6 lb/dall year001
Nickel, total [as Ni]daily average≤ 6.4 lb/dall year001
Nickel, total [as Ni]daily maximum≤ 15 lb/dall year001
Zinc, total [as Zn]daily average≤ 4.73 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 11.75 lb/dall year001
Carbon tetrachloridedaily average≤ .606 lb/dall year001
Carbon tetrachloridedaily maximum≤ 1.28 lb/dall year001
1,2-Dichloroethanedaily average≤ 2.29 lb/dall year001
1,2-Dichloroethanedaily maximum≤ 7.11 lb/dall year001
Chloroformdaily average≤ .708 lb/dall year001
Chloroformdaily maximum≤ 1.55 lb/dall year001
Toluenedaily average≤ .876 lb/dall year001
Toluenedaily maximum≤ 2.69 lb/dall year001
Benzenedaily average≤ 1.24 lb/dall year001
Benzenedaily maximum≤ 4.58 lb/dall year001
Acenaphthylenedaily average≤ .741 lb/dall year001
Acenaphthylenedaily maximum≤ 1.98 lb/dall year001
Acenaphthenedaily average≤ .741 lb/dall year001
Acenaphthenedaily maximum≤ 1.98 lb/dall year001
Acrylonitriledaily average≤ 3.23 lb/dall year001
Acrylonitriledaily maximum≤ 8.15 lb/dall year001
Anthracenedaily average≤ .741 lb/dall year001
Anthracenedaily maximum≤ 1.98 lb/dall year001
Benzo[k]fluoranthenedaily average≤ .741 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ 1.98 lb/dall year001
Benzo[a]pyrenedaily average≤ .0063 lb/dall year001
Benzo[a]pyrenedaily maximum≤ .013 lb/dall year001
Chlorobenzenedaily average≤ .505 lb/dall year001
Chlorobenzenedaily maximum≤ .944 lb/dall year001
Chrysenedaily average≤ .741 lb/dall year001
Chrysenedaily maximum≤ 1.98 lb/dall year001
Diethyl phthalatedaily average≤ 2.73 lb/dall year001
Diethyl phthalatedaily maximum≤ 6.84 lb/dall year001
Dimethyl phthalatedaily average≤ .64 lb/dall year001
Dimethyl phthalatedaily maximum≤ 1.58 lb/dall year001
Ethylbenzenedaily average≤ 1.07 lb/dall year001
Ethylbenzenedaily maximum≤ 3.64 lb/dall year001
Fluoranthenedaily average≤ .842 lb/dall year001
Fluoranthenedaily maximum≤ 2.29 lb/dall year001
Fluorenedaily average≤ .741 lb/dall year001
Fluorenedaily maximum≤ 1.98 lb/dall year001
Hexachlorobutadienedaily average≤ .558 lb/dall year001
Hexachlorobutadienedaily maximum≤ 1.18 lb/dall year001
Hexachloroethanedaily average≤ .708 lb/dall year001
Hexachloroethanedaily maximum≤ 1.82 lb/dall year001
Methyl chloride [Chloromethane]daily average≤ 2.89 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ 6.4 lb/dall year001
Methylene chloridedaily average≤ 1.34 lb/dall year001
Methylene chloridedaily maximum≤ 3 lb/dall year001
Nitrobenzenedaily average≤ .91 lb/dall year001
Nitrobenzenedaily maximum≤ 2.29 lb/dall year001
Phenanthrenedaily average≤ .741 lb/dall year001
Phenanthrenedaily maximum≤ 1.67 lb/dall year001
Pyrenedaily average≤ .842 lb/dall year001
Pyrenedaily maximum≤ 2.25 lb/dall year001
Tetrachloroethylenedaily average≤ .741 lb/dall year001
Tetrachloroethylenedaily maximum≤ 1.88 lb/dall year001
1,1-Dichloroethanedaily average≤ .741 lb/dall year001
1,1-Dichloroethanedaily maximum≤ 1.98 lb/dall year001
1,1-Dichloroethylenedaily average≤ .539 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ .842 lb/dall year001
1,1,1-Trichloroethanedaily average≤ .708 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ 1.82 lb/dall year001
1,1,2-Trichloroethanedaily average≤ .708 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ 1.82 lb/dall year001
Benzo[a]anthracenedaily average≤ .063 lb/dall year001
Benzo[a]anthracenedaily maximum≤ .134 lb/dall year001
1,2-Dichlorobenzenedaily average≤ 2.59 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ 5.49 lb/dall year001
1,2-Dichloropropanedaily average≤ 5.15 lb/dall year001
1,2-Dichloropropanedaily maximum≤ 7.75 lb/dall year001
trans-1,2-Dichloroethylenedaily average≤ .708 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ 1.82 lb/dall year001
1,2,4-Trichlorobenzenedaily average≤ 2.29 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ 4.71 lb/dall year001
1,3-Dichlorobenzenedaily average≤ 1.04 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ 1.48 lb/dall year001
1,4-Dichlorobenzenedaily average≤ .505 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ .944 lb/dall year001
2-Chlorophenoldaily average≤ 1.04 lb/dall year001
2-Chlorophenoldaily maximum≤ 3.3 lb/dall year001
2-Nitrophenoldaily average≤ 1.38 lb/dall year001
2-Nitrophenoldaily maximum≤ 2.32 lb/dall year001
2,4-Dichlorophenoldaily average≤ 1.31 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ 3.77 lb/dall year001
2,4-Dimethylphenoldaily average≤ .606 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ 1.21 lb/dall year001
2,4-Dinitrotoluenedaily average≤ 3.8 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ 9.6 lb/dall year001
2,4-Dinitrophenoldaily average≤ 2.39 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ 4.14 lb/dall year001
2,6-Dinitrotoluenedaily average≤ 8.59 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ 21.6 lb/dall year001
4-Nitrophenoldaily average≤ 2.42 lb/dall year001
4-Nitrophenoldaily maximum≤ 4.18 lb/dall year001
4,6-Dinitro-o-cresoldaily average≤ 2.62 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ 9.33 lb/dall year001
Phenoldaily average≤ .505 lb/dall year001
Phenoldaily maximum≤ .876 lb/dall year001
Naphthalenedaily average≤ .741 lb/dall year001
Naphthalenedaily maximum≤ 1.98 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily average≤ 3.47 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 9.4 lb/dall year001
Di-n-butyl phthalatedaily average≤ .91 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ 1.92 lb/dall year001
Vinyl chloridedaily average≤ 3.5 lb/dall year001
Vinyl chloridedaily maximum≤ 9.03 lb/dall year001
Trichloroethylenedaily average≤ .708 lb/dall year001
Trichloroethylenedaily maximum≤ 1.82 lb/dall year001
Hexachlorobenzenedaily average≤ .002 lb/dall year001
Hexachlorobenzenedaily maximum≤ .004 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ 8.9 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
1,3-Dichloropropylenedaily average≤ .977 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ 1.48 lb/dall year001
3,4-Benzofluoranthenedaily average≤ .775 lb/dall year001
3,4-Benzofluoranthenedaily maximum≤ 2.05 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 957 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 1914 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≤ 3.5 lb/dall year001
Chloroethanedaily maximum≤ 9.03 lb/dall year001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]daily maximum≤ 75 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 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]daily maximum≤ 75 mg/Lall year003
Zinc, total [as Zn]daily maximumreport only (mg/L)all 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 year004
pHmaximum≤ 9 SUall year004
Oil & Greasedaily maximum≤ 15 mg/Lall year004
Carbon, tot organic [TOC]daily maximum≤ 75 mg/Lall year004
Zinc, total [as Zn]daily maximum≤ .439 mg/Lall year004
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
pHminimum≥ 6 SUall year005
pHmaximum≤ 9 SUall year005
Oil & Greasedaily maximum≤ 15 mg/Lall year005
Carbon, tot organic [TOC]daily maximum≤ 75 mg/Lall year005
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
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 MPN/100mLall year101
Enterococcidaily maximum≤ 104 MPN/100mLall year101
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year201
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year201
Enterococcidaily average≤ 35 MPN/100mLall year201
Enterococcidaily maximum≤ 104 MPN/100mLall 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 (fail=0;pass=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (fail=0;pass=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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Your permit document is the final word. As JSON: /api/v1/permits/TX0003531 · MCP: https://passage-data.com/mcp