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Natural Gas Transmission, Zachary, Louisiana. NPDES permit LA0102407 expired Oct 31, 2025; its limits still apply. Last 12 months: no values over a limit, 1 required value missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 125 mg/L | all year | 102 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 125 mg/L | all year | 102 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 102 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 102 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 102 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 102 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 102 |
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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/LA0102407 · MCP: https://passage-data.com/mcp