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Evonik Corporation

Industrial Inorganic Chemicals, Etowah, Tennessee. NPDES permit TN0001996, in force until Mar 31, 2027. Last 12 months: over a limit once (last December 2025), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (20 values)
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 3 of 12 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, daily maximum81 mg/L≤ 40 mg/L103%

Limits in force (20)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
pHdaily minimum≥ 6 SU (alert, not enforceable)all year
pHdaily maximum≤ 9 SU (alert, not enforceable)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Oil and grease, hexane extr methoddaily maximum≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Aluminum, total [as Al]monthly average≤ 1.1 mg/Lall year
Aluminum, total [as Al]daily maximum≤ 2.9 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
Solids, total dissolveddaily maximumreport only (mg/L)all year
Sulfatemonthly average≤ 17500 lb/dall year
Sulfatedaily maximum≤ 20000 lb/dall year
pH range excursions, > 60 minutesvalue< 1 occur/moall year
pH range excursions, monthly total accumvalue≤ 446 minall year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 9.6 %all year
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 9.6 %all year

How strict are these limits?

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

Same industry: the 30 Chemicals and Allied Products permits in Tennessee.

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0001996 · MCP: https://passage-data.com/mcp