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Usalco LLC

Industrial Inorganic Chemicals, La Porte, Texas. NPDES permit TX0137413, in force until Nov 29, 2026. Last 12 months: no values over a limit, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: form A monthly (8 values)
Renewal application due: Jun 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file: August 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (8)

Parameter	Statistic	Limit	Months
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
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Carbon, tot organic [TOC], daily maximum 55 mg/L — stricter than 62% of 114 other minor industrial and other permits in Texas; 32% have the same limit
Oil & Grease, daily maximum 15 mg/L — stricter than 21% of 265 other minor industrial and other permits in Texas; 78% have the same limit

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/TX0137413 · MCP: https://passage-data.com/mcp