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Cabot Corporation

Industrial Inorganic Chemicals, Tuscola, Illinois. NPDES permit IL0004375, in force until Sep 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (8 values), outfall B01 form 0 monthly (12 values)
Renewal application due
Apr 3, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly maximum≤ 63 deg FJan, Feb, Mar, Dec001
Temperature, water deg. fahrenheitmonthly maximum≤ 93 deg FApr–Nov001
pHmonthly minimum≥ 6 SUall year001
pHmonthly maximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Nitrite + Nitrate total [as N]quarterly maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Iron, total [as Fe]quarterly maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Aluminum, total [as Al]quarterly maximumreport only (mg/L)Jan, Apr, Jul, Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
BOD, 5-day, 20 deg. C30-day average≤ 10 mg/Lall yearB01
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 mg/Lall yearB01
BOD, 5-day, 20 deg. C30-day average≤ 1.25 lb/dall yearB01
BOD, 5-day, 20 deg. Cdaily maximum≤ 2.5 lb/dall yearB01
pHmonthly minimum≥ 6 SUall yearB01
pHmonthly maximum≤ 9 SUall yearB01
Solids, total suspended30-day average≤ 12 mg/Lall yearB01
Solids, total suspendeddaily maximum≤ 24 mg/Lall yearB01
Solids, total suspended30-day average≤ 1.5 lb/dall yearB01
Solids, total suspendeddaily maximum≤ 3 lb/dall yearB01
Oil and grease30-day average≤ 15 mg/LJan, Apr, Jul, OctB01
Oil and greasedaily maximum≤ 30 mg/LJan, Apr, Jul, OctB01
Oil and grease30-day average≤ 1.88 lb/dJan, Apr, Jul, OctB01
Oil and greasedaily maximum≤ 3.75 lb/dJan, Apr, Jul, OctB01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB01

How strict are these limits?

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/IL0004375 · MCP: https://passage-data.com/mcp