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Petroleum Refining, major discharger, Corpus Christi, Texas. NPDES permit TX0134694 expired Jun 17, 2024; its limits still apply. Last 12 months: over a limit 3 times (last April 2026), 4 required values missing, 1 of 108 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| November 2025 | 004 | pH, maximum | 9.15 SU | ≤ 9 SU | — |
| April 2026 | 001 | Cyanide, free [amenable to chlorination], daily average | .0583 mg/L | ≤ .0087 mg/L | 570% |
| April 2026 | 001 | Cyanide, free [amenable to chlorination], daily maximum | .233 mg/L | ≤ .0185 mg/L | 1159% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 62.3 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 113 mg/L | all year | 001 |
| Oil & Grease | daily average | ≤ 24 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 42.6 mg/L | all year | 001 |
| Cyanide, free [amenable to chlorination] | daily average | ≤ .0087 mg/L | all year | 001 |
| Cyanide, free [amenable to chlorination] | daily maximum | ≤ .0185 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .167 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .167 MGD | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 10 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 20 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily average | ≤ 62.3 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 113 mg/L | all year | 002 |
| Oil & Grease | daily average | ≤ 24 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 42.6 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 1.5 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | all year | 002 |
| Cyanide, free [amenable to chlorination] | daily average | ≤ .0026 mg/L | all year | 002 |
| Cyanide, free [amenable to chlorination] | daily maximum | ≤ .0055 mg/L | all year | 002 |
| Chromium, hexavalent [as Cr] | daily average | ≤ .044 mg/L | all year | 002 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .094 mg/L | all year | 002 |
| Thallium, total [as Tl] | daily average | report only (mg/L) | all year | 002 |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year | 002 |
| Pentachlorophenol | daily average | ≤ .0004 mg/L | all year | 002 |
| Pentachlorophenol | daily maximum | ≤ .0008 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .167 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .167 MGD | all year | 002 |
| Mercury, total [as Hg] | daily average | ≤ .00003 mg/L | all year | 002 |
| Mercury, total [as Hg] | daily maximum | ≤ .00007 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 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 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | 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 |
| Flow [dry weather] | daily average | ≤ .055 MGD | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | 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 |
| 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 | ≤ 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 | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 007 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 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 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 104 lb/d | all year | 101 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 197 lb/d | all year | 101 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 542 lb/d | all year | 101 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 1053 lb/d | all year | 101 |
| pH | minimum | ≥ 6 SU | all year | 101 |
| pH | maximum | ≤ 9 SU | all year | 101 |
| Solids, total suspended | daily average | ≤ 89 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 140 lb/d | all year | 101 |
| Oil & Grease | daily average | ≤ 32.8 lb/d | all year | 101 |
| Oil & Grease | daily maximum | ≤ 61.2 lb/d | all year | 101 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 19.4 lb/d | all year | 101 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 43.2 lb/d | all year | 101 |
| Sulfide, total [as S] | daily average | ≤ .518 lb/d | all year | 101 |
| Sulfide, total [as S] | daily maximum | ≤ 1.17 lb/d | all year | 101 |
| Chromium, hexavalent [as Cr] | daily average | ≤ .117 lb/d | all year | 101 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .245 lb/d | all year | 101 |
| Chromium, total [as Cr] | daily average | ≤ 1.67 lb/d | all year | 101 |
| Chromium, total [as Cr] | daily maximum | ≤ 2.96 lb/d | all year | 101 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .144 MGD | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .144 MGD | all year | 101 |
| Phenolic compounds, total | daily average | ≤ .745 lb/d | all year | 101 |
| Phenolic compounds, total | daily maximum | ≤ 1.45 lb/d | 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 | average | 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 | average | 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) | average | 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) | average | 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) | average | 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 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Whole effluent toxicity - retest #1 | average | report only (pass=0;fail=1) | all year | TX2 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Whole effluent toxicity - retest #2 | average | report only (pass=0;fail=1) | all year | TX2 |
| 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 | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | average | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | monthly average minimum | report only (pass=0;fail=1) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | average | report only (%) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | monthly average minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | average | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | monthly average minimum | report only (%) | all year | TX2 |
| 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 | TX2 |
| 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 | TX2 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | monthly average minimum | report only (pass=0;fail=1) | all year | TX2 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX2 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX2 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (%) | all year | TX2 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | monthly average minimum | report only (%) | all year | TX2 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX2 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX2 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (%) | all year | TX2 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | monthly average minimum | report only (%) | all year | TX2 |
| 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 |
| Whole Effluent Toxicity [WET] - M. beryllina | single sample | report only (%) | all year | TXA |
| Whole Effluent Toxicity [WET] - M. beryllina | single sample | ≤ 100 % | all year | TXA |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (%) | all year | TXA |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | single sample | ≤ 100 % | 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 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXB |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXB |
| Whole Effluent Toxicity [WET] - M. beryllina | single sample | report only (%) | all year | TXB |
| Whole Effluent Toxicity [WET] - M. beryllina | single sample | report only (%) | all year | TXB |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (%) | all year | TXB |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (%) | all year | TXB |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXB |
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | single sample | report only (pass=0;fail=1) | all year | TXB |
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
Your permit document is the final word. As JSON: /api/v1/permits/TX0134694 · MCP: https://passage-data.com/mcp