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Petroleum Refining, major discharger, Houston, Texas. NPDES permit TX0003247, in force until Jan 11, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 46 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 342 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 213 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 16 mg/L | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ .13 mg/L | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .059 mg/L | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ .57 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .49 mg/L | all year | 001 |
| Polynuclear Aromatic Hydrocarbons [PAHs] | daily maximum | report only (mg/L) | all year | 001 |
| Toluene | daily maximum | report only (mg/L) | all year | 001 |
| Benzene | daily maximum | ≤ .45 mg/L | all year | 001 |
| Ethylbenzene | daily maximum | ≤ 1.4 mg/L | all year | 001 |
| Indeno[1,2,3-cd]pyrene | daily maximum | ≤ 1 mg/L | all year | 001 |
| Benzo[a]anthracene | daily maximum | ≤ .0018 mg/L | all year | 001 |
| Dibenz[a,h]anthracene | daily maximum | ≤ 1 mg/L | all year | 001 |
| Naphthalene | daily maximum | ≤ 1 mg/L | all year | 001 |
| Phenols | daily maximum | ≤ .33 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Cresol | daily maximum | report only (mg/L) | all year | 001 |
| Xylene [mix of m+o+p] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 46 mg/L | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 352 mg/L | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 227 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 16 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | ≤ .13 mg/L | all year | 003 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .061 mg/L | all year | 003 |
| Chromium, total [as Cr] | daily maximum | ≤ .59 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ .49 mg/L | all year | 003 |
| Polynuclear Aromatic Hydrocarbons [PAHs] | daily maximum | report only (mg/L) | all year | 003 |
| Toluene | daily maximum | report only (mg/L) | all year | 003 |
| Benzene | daily maximum | ≤ .45 mg/L | all year | 003 |
| Ethylbenzene | daily maximum | ≤ 1.4 mg/L | all year | 003 |
| Indeno[1,2,3-cd]pyrene | daily maximum | ≤ 1 mg/L | all year | 003 |
| Benzo[a]anthracene | daily maximum | ≤ .0018 mg/L | all year | 003 |
| Dibenz[a,h]anthracene | daily maximum | ≤ 1 mg/L | all year | 003 |
| Naphthalene | daily maximum | ≤ 1 mg/L | all year | 003 |
| Phenols | daily maximum | ≤ .34 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 |
| Cresol | daily maximum | report only (mg/L) | all year | 003 |
| Xylene [mix of m+o+p] | daily maximum | report only (mg/L) | all year | 003 |
| 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 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXC |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXC |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXC |
| LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | single sample | report only (pass=0;fail=1) | all year | TXC |
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/TX0003247 · MCP: https://passage-data.com/mcp