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MPM Silicones LLC

Industrial Organic Chemicals, Texas City, Texas. NPDES permit TX0108367 expired Jul 14, 2025; 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: outfall 001 form A monthly (8 values), outfall 201 form A monthly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 27 reports late

Limits in force (24)

ParameterStatisticLimitMonthsOutfall
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Carbon, tot organic [TOC]daily maximum≤ 75 mg/Lall year001
Copper, total [as Cu]daily averagereport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Aluminum, total [as Al]daily averagereport only (mg/L)all year001
Aluminum, total [as Al]daily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
BOD, 5-day, 20 deg. Cdaily average≤ 10 mg/Lall year201
BOD, 5-day, 20 deg. Cdaily maximum≤ 25 mg/Lall year201
pHminimum≥ 6 SUall year201
pHmaximum≤ 9 SUall year201
Oil & Greasedaily averagereport only (mg/L)all year201
Oil & Greasedaily maximum≤ 15 mg/Lall year201
Nitrogen, ammonia total [as N]daily average≤ 3 mg/Lall year201
Nitrogen, ammonia total [as N]daily maximum≤ 6 mg/Lall year201
Copper, total [as Cu]daily average≤ .029 mg/Lall year201
Copper, total [as Cu]daily maximum≤ .061 mg/Lall year201
Zinc, total [as Zn]daily average≤ .26 mg/Lall year201
Zinc, total [as Zn]daily maximum≤ .55 mg/Lall year201
Aluminum, total [as Al]daily average≤ .835 mg/Lall year201
Aluminum, total [as Al]daily maximum≤ 1.766 mg/Lall year201
Flow, in conduit or thru treatment plantdaily average≤ .02 MGDall year201
Flow, in conduit or thru treatment plantdaily maximum≤ .03 MGDall year201

How strict are these limits?

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/TX0108367 · MCP: https://passage-data.com/mcp