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Petroleum Refining, major discharger, Corpus Christi, Texas. NPDES permit TX0006904 expired Apr 8, 2026; its limits still apply. Last 12 months: over a limit 2 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| November 2025 | 003 | pH, maximum | 9.3 SU | ≤ 9 SU | — |
| April 2026 | 002 | Oil & Grease, instantaneous maximum | 60.1 mg/L | ≤ 15 mg/L | 301% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 105 deg F | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 418 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 752 lb/d | all year | 001 |
| pH | minimum | ≥ 5 SU | all year | 001 |
| pH | maximum | ≤ 11 SU | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 278 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 612 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 3 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 4 MGD | 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 | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | instantaneous maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | instantaneous 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 |
| Oil & Grease | instantaneous maximum | ≤ 15 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | instantaneous 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 | instantaneous maximum | ≤ 15 mg/L | all year | 004 |
| Carbon, tot organic [TOC] | instantaneous maximum | ≤ 55 mg/L | all year | 004 |
| Flow [dry weather] | daily average | ≤ .325 MGD | all year | 004 |
| Flow [dry weather] | daily maximum | report only (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 | ≤ 55 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 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 101 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 5603 lb/d | all year | 101 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 10863 lb/d | all year | 101 |
| pH | minimum | ≥ 5 SU | all year | 101 |
| pH | maximum | ≤ 11 SU | all year | 101 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 101 |
| Solids, total suspended | daily average | ≤ 845 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 1413 lb/d | all year | 101 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 101 |
| Oil & Grease | daily average | ≤ 236 lb/d | all year | 101 |
| Oil & Grease | daily maximum | ≤ 446 lb/d | all year | 101 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 101 |
| Sulfide, total [as S] | daily average | ≤ 3.6 lb/d | all year | 101 |
| Sulfide, total [as S] | daily maximum | ≤ 8 lb/d | all year | 101 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 101 |
| Chromium, hexavalent [as Cr] | daily average | ≤ .4 lb/d | all year | 101 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .9 lb/d | all year | 101 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 101 |
| Chromium, total [as Cr] | daily average | ≤ 4 lb/d | all year | 101 |
| Chromium, total [as Cr] | daily maximum | ≤ 12 lb/d | all year | 101 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 3 MGD | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 4 MGD | all year | 101 |
| Phenolic compounds, total | daily maximum | report only (mg/L) | all year | 101 |
| Phenolic compounds, total | daily average | ≤ 3.6 lb/d | all year | 101 |
| Phenolic compounds, total | daily maximum | ≤ 11 lb/d | all year | 101 |
| pH range excursions, > 60 minutes | monthly minimum | ≥ 0 occur/mo | all year | 101 |
| pH range excursions, monthly total accum | monthly total | ≤ 446 min | all year | 101 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 3 MGD | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 4 MGD | all year | 102 |
| 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 |
| 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
Your permit document is the final word. As JSON: /api/v1/permits/TX0006904 · MCP: https://passage-data.com/mcp