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Vertex Chemical Corporation

Industrial Inorganic Chemicals, Dupo, Illinois. NPDES permit IL0039519, in force until Jul 31, 2030. Last 12 months: over a limit 7 times (last August 2026), 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form 0 monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Cyanide, weak acid, dissociable, 30-day average.006 mg/L≤ .0052 mg/L15%
December 2025Cyanide, weak acid, dissociable, 30-day average.006 mg/L≤ .0052 mg/L15%
January 2026Cyanide, weak acid, dissociable, 30-day average.008 mg/L≤ .0052 mg/L54%
April 2026Cyanide, weak acid, dissociable, 30-day average.008 mg/L≤ .0052 mg/L54%
May 2026Cyanide, weak acid, dissociable, 30-day average.008 mg/L≤ .0052 mg/L54%
June 2026Cyanide, weak acid, dissociable, 30-day average.007 mg/L≤ .0052 mg/L35%
August 2026Cyanide, weak acid, dissociable, 30-day average.006 mg/L≤ .0052 mg/L15%

Limits in force (5)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly maximum≤ 63 deg FJan, Feb, Mar, Dec
Temperature, water deg. fahrenheitmonthly maximum≤ 93 deg FApr–Nov
Cyanide, weak acid, dissociable30-day average≤ .0052 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year

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

Same industry: the 58 Chemicals and Allied Products permits in Illinois.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0039519 · MCP: https://passage-data.com/mcp