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Enterprise Products Operating LLC

Marine Cargo Handling, Houston, Texas. NPDES permit TX0133353, in force until May 12, 2028. Last 12 months: over a limit 8 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: outfall 001 form A monthly (8 values), outfall 002 form A monthly (6 values)
Renewal application due: Nov 14, 2027 · 180 days before expiry; your permit may set another date
Last report on file: September 2026
Oct 2024 – Sep 2025: 2 values over a limit, 0 required values missing, 0 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period ending	Outfall	Parameter	Reported	Limit	Over by
February 2026	001	Chlorine, total residual, daily average	.6 mg/L	≤ .2 mg/L	200%
February 2026	001	Chlorine, total residual, daily maximum	2.2 mg/L	≤ .5 mg/L	340%
February 2026	001	pH, maximum	9.5 SU	≤ 9 SU	—
February 2026	002	pH, maximum	9.5 SU	≤ 9 SU	—
March 2026	001	Chlorine, total residual, daily average	.3 mg/L	≤ .2 mg/L	50%
March 2026	001	Chlorine, total residual, daily maximum	.6 mg/L	≤ .5 mg/L	20%
April 2026	001	Oxygen demand, chem. [high level] [COD], daily maximum	295 mg/L	≤ 200 mg/L	48%
July 2026	001	Chlorine, total residual, daily average	.3 mg/L	≤ .2 mg/L	50%

Limits in force (14)

Parameter	Statistic	Limit	Months	Outfall
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 200 mg/L	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Oil & Grease	daily maximum	≤ 15 mg/L	all year	001
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	daily average	≤ .2 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .5 mg/L	all year	001
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Oil & Grease	daily maximum	≤ 15 mg/L	all year	002
Carbon, tot organic [TOC]	daily maximum	≤ 75 mg/L	all year	002
Flow [dry weather]	daily average	report only (MGD)	all year	002
Flow [dry weather]	daily maximum	report only (MGD)	all year	002

How strict are these limits?

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
Chlorine, total residual, daily maximum .5 mg/L — stricter than 18% of 27 other minor industrial and other permits in Texas; 11% have the same limit

Cited limits by parameter: Texas's rules and the federal ones.

Same industry: the 19 Water Transportation 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/TX0133353 · MCP: https://passage-data.com/mcp