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Natural Gas Liquids, Velma, Oklahoma. NPDES permit OK0000931, in force until Apr 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 150 mg/L | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | monthly average | report only (lb/d) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (lb/d) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 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 | ≤ 150 mg/L | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | monthly average | report only (lb/d) | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (lb/d) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
Cited limits by parameter: Oklahoma's rules and the federal ones.
Same industry: the 6 Oil and Gas Extraction permits in Oklahoma.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/OK0000931 · MCP: https://passage-data.com/mcp