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Natural Gas Transmission, Port Sulphur, Louisiana. NPDES permit LA0086452, in force until Aug 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 200 mg/L | all year |
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 200 mg/L | all year |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 300 mg/L | all year |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 300 mg/L | all year |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
Cited limits by parameter: Louisiana's rules and the federal ones.
Same industry: the 10 Natural Gas Transmission permits in Louisiana.
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