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Vencorex US Inc

Industrial Organic Chemicals, Freeport, Texas. NPDES permit TX0008737, in force until Dec 18, 2030. Last 12 months: over a limit once (last October 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (18 values), outfall 002 form A monthly (6 values), outfall 002 form Q quarterly (1 value), outfall 002 form Y yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
8 values over a limit, 0 required values missing, 0 of 29 reports late

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

Period endingParameterReportedLimitOver by
October 2025Sulfate, total [as SO4], daily maximum227 mg/L≤ 125 mg/L82%

Limits in force (26)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximum≤ 105 deg Fall year001
BOD, 5-day, 20 deg. Cdaily average≤ 19 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 47 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily average≤ 24 lb/dall year001
Solids, total suspendeddaily maximum≤ 69 lb/dall year001
Oil & Greasedaily average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Nitrogen, ammonia total [as N]daily average≤ 4 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 8 lb/dall year001
Carbon, tot organic [TOC]daily average≤ 117 lb/dall year001
Carbon, tot organic [TOC]daily maximum≤ 235 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ .125 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ .2 MGDall year001
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year001
Enterococcidaily average≤ 35 CFU/100mLall year001
Enterococcidaily maximum≤ 130 CFU/100mLall year001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]daily maximum≤ 55 mg/Lall year002
Sulfate, total [as SO4]daily maximum≤ 125 mg/Lall year002
Zinc, total [as Zn]daily maximum≤ .4 mg/Lall year002
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002

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/TX0008737 · MCP: https://passage-data.com/mcp