Passage Data · Check a report · Use it from your AI

Nalco Production, LLC

Industrial Organic Chemicals, Fresno, Texas. NPDES permit TX0112461 expired Apr 8, 2026; its limits still apply. Last 12 months: over a limit 4 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (14 values), outfall 002 form A monthly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
April 2026BOD, 5-day, 20 deg. C, daily maximum98.72 mg/L≤ 95 mg/L4%
April 2026Solids, total suspended, daily average70.2 mg/L≤ 30 mg/L134%
April 2026Solids, total suspended, daily maximum128 mg/L≤ 100 mg/L28%
June 2026BOD, 5-day, 20 deg. C, daily maximum104 mg/L≤ 95 mg/L9%

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cdaily average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 95 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Copper, total [as Cu]daily average≤ .128 mg/Lall year001
Copper, total [as Cu]daily maximum≤ .271 mg/Lall year001
Zinc, total [as Zn]daily average≤ .408 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ .865 mg/Lall year001
Flow, in conduit or thru treatment plantdaily average≤ .015 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ .025 MGDall year001
Chlorine, free availabledaily average≤ .2 mg/Lall year001
Chlorine, free availabledaily maximum≤ .5 mg/Lall year001
E. colidaily geometric mean≤ 126 CFU/100mLall year001
E. colidaily maximum≤ 200 CFU/100mLall year001
BOD, 5-day, 20 deg. Cdaily average≤ 45 mg/Lall year002
BOD, 5-day, 20 deg. Cdaily maximum≤ 95 mg/Lall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendeddaily average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 100 mg/Lall year002
Oil & Greasedaily average≤ 15 mg/Lall year002
Oil & Greasedaily maximum≤ 20 mg/Lall year002
Copper, total [as Cu]daily average≤ .164 mg/Lall year002
Copper, total [as Cu]daily maximum≤ .348 mg/Lall year002
Flow, in conduit or thru treatment plantdaily average≤ .02 MGDall year002
Flow, in conduit or thru treatment plantdaily maximum≤ .025 MGDall year002
E. colidaily geometric mean≤ 126 CFU/100mLall year002
E. colidaily maximum≤ 200 CFU/100mLall 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.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0112461 · MCP: https://passage-data.com/mcp