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Petroleum Refining, major discharger, City Of Port Arthur, Texas. NPDES permit TX0005991 expired Feb 7, 2025; its limits still apply. Last 12 months: over a limit 7 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Solids, total suspended, daily maximum | 8167.4 lb/d | ≤ 6436 lb/d | 27% |
| March 2026 | Solids, total suspended, daily maximum | 16514.4 lb/d | ≤ 6436 lb/d | 157% |
| May 2026 | Enterococci, daily average | 99 CFU/100mL | ≤ 39 CFU/100mL | 154% |
| May 2026 | Enterococci, daily maximum | 24200 CFU/100mL | ≤ 85 CFU/100mL | 28371% |
| July 2026 | Enterococci, daily average | 47 CFU/100mL | ≤ 39 CFU/100mL | 21% |
| July 2026 | Enterococci, daily maximum | 759 CFU/100mL | ≤ 85 CFU/100mL | 793% |
| September 2026 | Enterococci, daily maximum | 345 CFU/100mL | ≤ 85 CFU/100mL | 306% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 6977 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 12392 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 241 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 362 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 45092 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 88821 lb/d | all year | 001 |
| pH | minimum | ≥ 5 SU | all year | 001 |
| pH | maximum | ≤ 11 SU | all year | 001 |
| Solids, total suspended | daily average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | daily average | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Oil & Grease | daily average | ≤ 2464 lb/d | all year | 001 |
| Oil & Grease | daily maximum | ≤ 4548 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 1910 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4130 lb/d | all year | 001 |
| Cyanide, total [as CN] | daily average | ≤ .0042 mg/L | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ .0089 mg/L | all year | 001 |
| Cyanide, total [as CN] | daily average | ≤ 1.12 lb/d | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ 2.37 lb/d | all year | 001 |
| Sulfide, total [as S] | daily average | ≤ .1 mg/L | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ .21 mg/L | all year | 001 |
| Sulfide, total [as S] | daily average | ≤ 31.3 lb/d | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ 65.8 lb/d | all year | 001 |
| Chromium, hexavalent [as Cr] | daily average | ≤ .025 mg/L | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .054 mg/L | all year | 001 |
| Chromium, hexavalent [as Cr] | daily average | ≤ 7.1 lb/d | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 15.4 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily average | ≤ .23 mg/L | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ .6 mg/L | all year | 001 |
| Chromium, total [as Cr] | daily average | ≤ 62.3 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ 172 lb/d | all year | 001 |
| Lead, total [as Pb] | daily average | ≤ .087 mg/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .19 mg/L | all year | 001 |
| Lead, total [as Pb] | daily average | ≤ 22 lb/d | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 47 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 33 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 55 MGD | all year | 001 |
| Phenolic compounds, total | daily average | ≤ .15 mg/L | all year | 001 |
| Phenolic compounds, total | daily maximum | ≤ .3 mg/L | all year | 001 |
| Phenolic compounds, total | daily average | ≤ 43.7 lb/d | all year | 001 |
| Phenolic compounds, total | daily maximum | ≤ 90.3 lb/d | all year | 001 |
| Mercury, total [as Hg] | daily average | ≤ .00049 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .001 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily average | ≤ .064 lb/d | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .136 lb/d | all year | 001 |
| pH range excursions, > 60 minutes | monthly total | ≤ 0 occur/mo | all year | 001 |
| pH range excursions, monthly total accum | monthly total | ≤ 446 min | all year | 001 |
| 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 | ≤ 75 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 | minimum | ≥ 6 SU | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 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 average | report only (MGD) | 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 |
| Flow, in conduit or thru treatment plant | daily maximum | 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 | ≤ 75 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 | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 008 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 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 |
| pH | minimum | ≥ 6 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 65 mg/L | all year | 009 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 009 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| pH | minimum | ≥ 6 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 010 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 010 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| pH | minimum | ≥ 6 SU | all year | 011 |
| pH | maximum | ≤ 9 SU | all year | 011 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 011 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 011 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| pH | minimum | ≥ 6 SU | all year | 012 |
| pH | maximum | ≤ 9 SU | all year | 012 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 012 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 012 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 012 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012 |
| pH | minimum | ≥ 6 SU | all year | 013 |
| pH | maximum | ≤ 9 SU | all year | 013 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 013 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 013 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| pH | minimum | ≥ 6 SU | all year | 014 |
| pH | maximum | ≤ 9 SU | all year | 014 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 014 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 014 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Solids, total suspended | daily average | ≤ 3789 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 6436 lb/d | all year | 101 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Enterococci | daily average | ≤ 39 CFU/100mL | all year | 101 |
| Enterococci | daily maximum | ≤ 85 CFU/100mL | all year | 101 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| 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 #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 | 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 |
| 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 menidia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 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 Reproduction Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 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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