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Crucible ETN, LLC

Lead And Zinc Ores, major discharger, Jefferson City, Tennessee. NPDES permit TN0001732, in force until Jan 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G quarterly (40 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 2 required values missing, 4 of 12 reports late

Limits in force (40)

ParameterStatisticLimitMonths
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 20 mg/Lall year
Oil & Greasedaily maximum≤ 20 mg/Lall year
Cadmium, total [as Cd]monthly average≤ .00643 mg/Lall year
Cadmium, total [as Cd]monthly average≤ .00643 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .01286 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .01286 mg/Lall year
Copper, total [as Cu]monthly average≤ .07839 mg/Lall year
Copper, total [as Cu]monthly average≤ .07839 mg/Lall year
Copper, total [as Cu]daily maximum≤ .12843 mg/Lall year
Copper, total [as Cu]daily maximum≤ .12843 mg/Lall year
Lead, total [as Pb]monthly average≤ .00633 mg/Lall year
Lead, total [as Pb]monthly average≤ .00633 mg/Lall year
Lead, total [as Pb]daily maximum≤ .01266 mg/Lall year
Lead, total [as Pb]daily maximum≤ .01266 mg/Lall year
Zinc, total [as Zn]monthly average≤ .75 mg/Lall year
Zinc, total [as Zn]monthly average≤ .75 mg/Lall year
Zinc, total [as Zn]daily maximum≤ 1.2328 mg/Lall year
Zinc, total [as Zn]daily maximum≤ 1.2328 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all 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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Mercury, total [as Hg]monthly average≤ .0000515 mg/Lall year
Mercury, total [as Hg]monthly average≤ .0000515 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .0000927 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .0000927 mg/Lall year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 76.7 %all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 76.7 %all year
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 76.7 %all year
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 76.7 %all year

How strict are these limits?

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

Same industry: the 10 Metal Mining permits in Tennessee.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0001732 · MCP: https://passage-data.com/mcp