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Industrial Gases, Freeport, Texas. NPDES permit TX0065021, in force until Feb 24, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. fahrenheit | daily average | ≤ 95 deg F | all year |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 100 deg F | all year |
| Oxygen demand, chem. [high level] [COD] | daily average | report only (mg/L) | all year |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 230 lb/d | all year |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 361 lb/d | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | daily average | ≤ 115 lb/d | all year |
| Solids, total suspended | daily maximum | ≤ 192 lb/d | all year |
| Oil & Grease | daily average | report only (mg/L) | all year |
| Oil & Grease | daily maximum | report only (mg/L) | all year |
| Oil & Grease | daily average | ≤ 15.7 lb/d | all year |
| Oil & Grease | daily maximum | ≤ 21 lb/d | all year |
| Cyanide, free [as free] | daily average | ≤ .022 mg/L | all year |
| Cyanide, free [as free] | daily maximum | ≤ .047 mg/L | all year |
| Cyanide, free [as free] | daily average | ≤ .084 lb/d | all year |
| Cyanide, free [as free] | daily maximum | ≤ .18 lb/d | all year |
| Copper, total [as Cu] | daily average | ≤ .0557 mg/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ .117 mg/L | all year |
| Copper, total [as Cu] | daily average | ≤ .214 lb/d | all year |
| Copper, total [as Cu] | daily maximum | ≤ .449 lb/d | all year |
| Zinc, total [as Zn] | daily average | ≤ .951 mg/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 2.01 mg/L | all year |
| Zinc, total [as Zn] | daily average | ≤ 3.65 lb/d | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 7.72 lb/d | all year |
| Aluminum, total [as Al] | daily average | ≤ .486 mg/L | all year |
| Aluminum, total [as Al] | daily maximum | ≤ 1.03 mg/L | all year |
| Aluminum, total [as Al] | daily average | ≤ 1.87 lb/d | all year |
| Aluminum, total [as Al] | daily maximum | ≤ 3.95 lb/d | all year |
| Flow, in conduit or thru treatment plant | daily average | ≤ .46 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .58 MGD | all year |
Cited limits by parameter: Texas's rules and the federal ones.
Same industry: the 165 Chemicals and Allied Products 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/TX0065021 · MCP: https://passage-data.com/mcp