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Fabricated Plate Work (Boiler Shops), Ruston, Louisiana. NPDES permit LA0126941, in force until Aug 31, 2031. Last 12 months: no values over a limit, 2 of 6 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 8.5 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 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (ug/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 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 003 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 003 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | daily maximum | report only (ug/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: Louisiana's rules and the federal ones.
Same industry: the 7 Fabricated Metal Products 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/LA0126941 · MCP: https://passage-data.com/mcp