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Crucible ETN, LLC

Lead And Zinc Ores, major discharger, Strawberry Plains, Tennessee. NPDES permit TN0061468, in force until Jul 31, 2027. Last 12 months: over a limit 2 times (last July 2026), 2 required values missing, 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G quarterly (36 values), form T yearly (4 values)
Renewal application due
Feb 1, 2027 · 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 13 reports late

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

Period endingParameterReportedLimitOver by
December 2025IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum19.3 %> 84.8 %77%
July 2026IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum42.4 %> 84.8 %50%

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≤ .00575 mg/Lall year
Cadmium, total [as Cd]monthly average≤ .00575 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .0172 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .0172 mg/Lall year
Copper, total [as Cu]monthly average≤ .07773 mg/Lall year
Copper, total [as Cu]monthly average≤ .07773 mg/Lall year
Copper, total [as Cu]daily maximum≤ .12622 mg/Lall year
Copper, total [as Cu]daily maximum≤ .12622 mg/Lall year
Lead, total [as Pb]monthly average≤ .04958 mg/Lall year
Lead, total [as Pb]monthly average≤ .04958 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≤ 1.269 mg/Lall year
Zinc, total [as Zn]daily maximum≤ 1.269 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≤ .00008 mg/Lall year
Mercury, total [as Hg]monthly average≤ .00008 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .00004 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .00004 mg/Lall year
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 84.8 %all year
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 84.8 %all year
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 84.8 %all year
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 84.8 %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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Your permit document is the final word. As JSON: /api/v1/permits/TN0061468 · MCP: https://passage-data.com/mcp