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Crucible ETN, LLC

Lead And Zinc Ores, major discharger, Mascot, Tennessee. NPDES permit TN0001759, in force until Nov 30, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 74 days after each period: form G quarterly (32 values)
Renewal application due
Jun 3, 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

Limits in force (32)

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
Cadmium, total [as Cd]monthly average≤ .05 mg/Lall year
Cadmium, total [as Cd]monthly average≤ .05 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .1 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .1 mg/Lall year
Copper, total [as Cu]monthly average≤ .15 mg/Lall year
Copper, total [as Cu]monthly average≤ .15 mg/Lall year
Copper, total [as Cu]daily maximum≤ .3 mg/Lall year
Copper, total [as Cu]daily maximum≤ .3 mg/Lall year
Lead, total [as Pb]monthly average≤ .3 mg/Lall year
Lead, total [as Pb]monthly average≤ .3 mg/Lall year
Lead, total [as Pb]daily maximum≤ .6 mg/Lall year
Lead, total [as Pb]daily maximum≤ .6 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≤ 1.5 mg/Lall year
Zinc, total [as Zn]daily maximum≤ 1.5 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≤ .001 mg/Lall year
Mercury, total [as Hg]monthly average≤ .001 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .002 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .002 mg/Lall 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.

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/TN0001759 · MCP: https://passage-data.com/mcp