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Petroleum Refining, major discharger, Port Arthur, Texas. NPDES permit TX0004201, in force until Oct 23, 2028. Last 12 months: over a limit 5 times (last June 2026), 31 required values missing, 12 of 103 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 005 | Solids, total suspended, daily maximum | 97 mg/L | ≤ 60 mg/L | 62% |
| March 2026 | 005 | Solids, total suspended, daily maximum | 94 mg/L | ≤ 60 mg/L | 57% |
| April 2026 | 005 | Solids, total suspended, daily maximum | 61 mg/L | ≤ 60 mg/L | 2% |
| May 2026 | 005 | Solids, total suspended, daily maximum | 140 mg/L | ≤ 60 mg/L | 133% |
| June 2026 | 001 | pH, maximum | 11.1 SU | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily average | ≤ 2831 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 5298 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 19418 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 37733 lb/d | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 2555 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 4801 lb/d | all year | 001 |
| Oil & Grease | daily average | ≤ 904 lb/d | all year | 001 |
| Oil & Grease | daily maximum | ≤ 1674 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 1203 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2686 lb/d | all year | 001 |
| Carbon, tot organic [TOC] | daily average | ≤ 3223 lb/d | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 6446 lb/d | all year | 001 |
| Cyanide, free [as free] | daily average | ≤ .52 lb/d | all year | 001 |
| Cyanide, free [as free] | daily maximum | ≤ 1.1 lb/d | all year | 001 |
| Sulfide, total [as S] | daily average | ≤ 11.3 lb/d | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ 25.3 lb/d | all year | 001 |
| Chromium, hexavalent [as Cr] | daily average | ≤ 1.81 lb/d | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 4.04 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily average | ≤ 24.7 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ 65.4 lb/d | all year | 001 |
| Carbon tetrachloride | daily average | ≤ .96 lb/d | all year | 001 |
| Carbon tetrachloride | daily maximum | ≤ 2.02 lb/d | all year | 001 |
| 1,2-Dichloroethane | daily average | ≤ 3.62 lb/d | all year | 001 |
| 1,2-Dichloroethane | daily maximum | ≤ 11.22 lb/d | all year | 001 |
| Chloroform | daily average | ≤ 1.12 lb/d | all year | 001 |
| Chloroform | daily maximum | ≤ 2.45 lb/d | all year | 001 |
| Toluene | daily average | ≤ 1.38 lb/d | all year | 001 |
| Toluene | daily maximum | ≤ 4.26 lb/d | all year | 001 |
| Benzene | daily average | ≤ 1.97 lb/d | all year | 001 |
| Benzene | daily maximum | ≤ 7.23 lb/d | all year | 001 |
| Acenaphthylene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Acenaphthylene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Acenaphthene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Acenaphthene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Acrylonitrile | daily average | ≤ 5.11 lb/d | all year | 001 |
| Acrylonitrile | daily maximum | ≤ 12.87 lb/d | all year | 001 |
| Anthracene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Anthracene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Benzo[k]fluoranthene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Benzo[k]fluoranthene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Benzo[a]pyrene | daily average | ≤ .0051 lb/d | all year | 001 |
| Benzo[a]pyrene | daily maximum | ≤ .0107 lb/d | all year | 001 |
| Chlorobenzene | daily average | ≤ .8 lb/d | all year | 001 |
| Chlorobenzene | daily maximum | ≤ 1.49 lb/d | all year | 001 |
| Chrysene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Chrysene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Diethyl phthalate | daily average | ≤ 4.31 lb/d | all year | 001 |
| Diethyl phthalate | daily maximum | ≤ 10.8 lb/d | all year | 001 |
| Dimethyl phthalate | daily average | ≤ 1.01 lb/d | all year | 001 |
| Dimethyl phthalate | daily maximum | ≤ 2.5 lb/d | all year | 001 |
| Ethylbenzene | daily average | ≤ 1.7 lb/d | all year | 001 |
| Ethylbenzene | daily maximum | ≤ 5.75 lb/d | all year | 001 |
| Fluoranthene | daily average | ≤ 1.33 lb/d | all year | 001 |
| Fluoranthene | daily maximum | ≤ 3.62 lb/d | all year | 001 |
| Fluorene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Fluorene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Hexachlorobutadiene | daily average | ≤ .445 lb/d | all year | 001 |
| Hexachlorobutadiene | daily maximum | ≤ .942 lb/d | all year | 001 |
| Hexachloroethane | daily average | ≤ 1.12 lb/d | all year | 001 |
| Hexachloroethane | daily maximum | ≤ 2.87 lb/d | all year | 001 |
| Methyl chloride [Chloromethane] | daily average | ≤ 4.58 lb/d | all year | 001 |
| Methyl chloride [Chloromethane] | daily maximum | ≤ 10.11 lb/d | all year | 001 |
| Methylene chloride | daily average | ≤ 2.13 lb/d | all year | 001 |
| Methylene chloride | daily maximum | ≤ 4.73 lb/d | all year | 001 |
| Nitrobenzene | daily average | ≤ 1.44 lb/d | all year | 001 |
| Nitrobenzene | daily maximum | ≤ 3.62 lb/d | all year | 001 |
| Phenanthrene | daily average | ≤ .711 lb/d | all year | 001 |
| Phenanthrene | daily maximum | ≤ 1.51 lb/d | all year | 001 |
| Pyrene | daily average | ≤ 1.33 lb/d | all year | 001 |
| Pyrene | daily maximum | ≤ 3.56 lb/d | all year | 001 |
| Tetrachloroethylene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Tetrachloroethylene | daily maximum | ≤ 2.98 lb/d | all year | 001 |
| 1,1-Dichloroethane | daily average | ≤ 1.17 lb/d | all year | 001 |
| 1,1-Dichloroethane | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| 1,1-Dichloroethylene | daily average | ≤ .85 lb/d | all year | 001 |
| 1,1-Dichloroethylene | daily maximum | ≤ 1.33 lb/d | all year | 001 |
| 1,1,1-Trichloroethane | daily average | ≤ 1.12 lb/d | all year | 001 |
| 1,1,1-Trichloroethane | daily maximum | ≤ 2.87 lb/d | all year | 001 |
| 1,1,2-Trichloroethane | daily average | ≤ 1.12 lb/d | all year | 001 |
| 1,1,2-Trichloroethane | daily maximum | ≤ 2.87 lb/d | all year | 001 |
| Benzo[a]anthracene | daily average | ≤ .051 lb/d | all year | 001 |
| Benzo[a]anthracene | daily maximum | ≤ .107 lb/d | all year | 001 |
| 1,2-Dichlorobenzene | daily average | ≤ 4.1 lb/d | all year | 001 |
| 1,2-Dichlorobenzene | daily maximum | ≤ 8.67 lb/d | all year | 001 |
| 1,2-Dichloropropane | daily average | ≤ 8.14 lb/d | all year | 001 |
| 1,2-Dichloropropane | daily maximum | ≤ 12.24 lb/d | all year | 001 |
| trans-1,2-Dichloroethylene | daily average | ≤ 1.12 lb/d | all year | 001 |
| trans-1,2-Dichloroethylene | daily maximum | ≤ 2.87 lb/d | all year | 001 |
| 1,2,4-Trichlorobenzene | daily average | ≤ 3.62 lb/d | all year | 001 |
| 1,2,4-Trichlorobenzene | daily maximum | ≤ 7.45 lb/d | all year | 001 |
| 1,3-Dichlorobenzene | daily average | ≤ 1.65 lb/d | all year | 001 |
| 1,3-Dichlorobenzene | daily maximum | ≤ 2.34 lb/d | all year | 001 |
| 1,4-Dichlorobenzene | daily average | ≤ .8 lb/d | all year | 001 |
| 1,4-Dichlorobenzene | daily maximum | ≤ 1.49 lb/d | all year | 001 |
| 2-Chlorophenol | daily average | ≤ 1.65 lb/d | all year | 001 |
| 2-Chlorophenol | daily maximum | ≤ 5.21 lb/d | all year | 001 |
| 2-Nitrophenol | daily average | ≤ 2.18 lb/d | all year | 001 |
| 2-Nitrophenol | daily maximum | ≤ 3.67 lb/d | all year | 001 |
| 2,4-Dichlorophenol | daily average | ≤ 2.07 lb/d | all year | 001 |
| 2,4-Dichlorophenol | daily maximum | ≤ 5.96 lb/d | all year | 001 |
| 2,4-Dimethylphenol | daily average | ≤ .96 lb/d | all year | 001 |
| 2,4-Dimethylphenol | daily maximum | ≤ 1.92 lb/d | all year | 001 |
| 2,4-Dinitrotoluene | daily average | ≤ 6.01 lb/d | all year | 001 |
| 2,4-Dinitrotoluene | daily maximum | ≤ 15.16 lb/d | all year | 001 |
| 2,4-Dinitrophenol | daily average | ≤ 3.78 lb/d | all year | 001 |
| 2,4-Dinitrophenol | daily maximum | ≤ 6.54 lb/d | all year | 001 |
| 2,6-Dinitrotoluene | daily average | ≤ 13.57 lb/d | all year | 001 |
| 2,6-Dinitrotoluene | daily maximum | ≤ 34.1 lb/d | all year | 001 |
| 4-Nitrophenol | daily average | ≤ 3.83 lb/d | all year | 001 |
| 4-Nitrophenol | daily maximum | ≤ 6.6 lb/d | all year | 001 |
| 4,6-Dinitro-o-cresol | daily average | ≤ 4.15 lb/d | all year | 001 |
| 4,6-Dinitro-o-cresol | daily maximum | ≤ 14.74 lb/d | all year | 001 |
| Phenol | daily average | ≤ .8 lb/d | all year | 001 |
| Phenol | daily maximum | ≤ 1.38 lb/d | all year | 001 |
| Naphthalene | daily average | ≤ 1.17 lb/d | all year | 001 |
| Naphthalene | daily maximum | ≤ 3.14 lb/d | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily average | ≤ 5.48 lb/d | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ 14.84 lb/d | all year | 001 |
| Di-n-butyl phthalate | daily average | ≤ 1.44 lb/d | all year | 001 |
| Di-n-butyl phthalate | daily maximum | ≤ 3.03 lb/d | all year | 001 |
| Vinyl chloride | daily average | ≤ 5.53 lb/d | all year | 001 |
| Vinyl chloride | daily maximum | ≤ 14.26 lb/d | all year | 001 |
| Trichloroethylene | daily average | ≤ 1.12 lb/d | all year | 001 |
| Trichloroethylene | daily maximum | ≤ 2.87 lb/d | all year | 001 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (ug/L) | all year | 001 |
| Hexachlorobenzene | daily average | ≤ .0014 lb/d | all year | 001 |
| Hexachlorobenzene | daily maximum | ≤ .0029 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 7.1 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 9.1 MGD | all year | 001 |
| 1,3-Dichloropropylene | daily average | ≤ 1.54 lb/d | all year | 001 |
| 1,3-Dichloropropylene | daily maximum | ≤ 2.34 lb/d | all year | 001 |
| Phenolic compounds, total | daily average | ≤ 15.8 lb/d | all year | 001 |
| Phenolic compounds, total | daily maximum | ≤ 34.3 lb/d | all year | 001 |
| 3,4-Benzofluoranthene | daily average | ≤ 1.22 lb/d | all year | 001 |
| 3,4-Benzofluoranthene | daily maximum | ≤ 3.25 lb/d | all year | 001 |
| Chloroethane | daily average | ≤ 5.53 lb/d | all year | 001 |
| Chloroethane | daily maximum | ≤ 14.26 lb/d | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| pH | minimum | ≥ 6 SU | all year | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 300 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| pH | minimum | ≥ 6 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 008 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 008 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXA |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | single sample | report only (pass=0;fail=1) | all year | TXA |
Cited limits by parameter: Texas's rules and the federal ones.
Same industry: the 32 Petroleum Refining and Related Industries permits in Texas.
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On EPA ECHO: Facility report · DMR history
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