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Exxonmobil Oil Corporation

Industrial Organic Chemicals, Beaumont, Texas. NPDES permit TX0004227 expired Aug 30, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: form A monthly (8 values), form S twice a year
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 14 reports late

Limits in force (10)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year
Zinc, total [as Zn]	daily maximum	≤ 1.441 mg/L	all year
Toluene	daily maximum	≤ .02 mg/L	all year
Benzene	daily maximum	≤ .02 mg/L	all year
Phenols	daily maximum	≤ .1 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?

Benzene, daily maximum .02 mg/L — stricter than 76% of 26 other minor industrial and other permits in Texas
Toluene, daily maximum .02 mg/L — stricter than 74% of 87 other minor industrial and other permits nationwide; 8% have the same limit
Phenols, daily maximum .1 mg/L — stricter than 65% of 44 other minor industrial and other permits nationwide; 16% 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/TX0004227 · MCP: https://passage-data.com/mcp