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Lead And Zinc Ores, major discharger, Clarksville, Tennessee. NPDES permit TN0029157, in force until Oct 31, 2030. Last 12 months: no values over a limit, 9 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Conductivity | monthly average | report only (umho/cm) | all year | 001 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 2642 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 5248 lb/d | all year | 001 |
| Arsenic, total [as As] | monthly average | ≤ 16.26 lb/d | all year | 001 |
| Arsenic, total [as As] | daily maximum | ≤ 35.2 lb/d | all year | 001 |
| Cadmium, total [as Cd] | monthly average | ≤ 2.15 lb/d | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ 5.38 lb/d | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 17.3 lb/d | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 36.1 lb/d | all year | 001 |
| Lead, total [as Pb] | monthly average | ≤ 3.46 lb/d | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 7.42 lb/d | all year | 001 |
| Zinc, total [as Zn] | monthly average | ≤ 15 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 35.5 lb/d | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ 4.68 lb/d | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ 62.4 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | minimum | ≥ 100 % (alert, not enforceable) | all year | 002 |
| LC50 Static 48Hr Acute Pimephales promelas | minimum | ≥ 100 % (alert, not enforceable) | all year | 002 |
| pH | minimum | ≥ 6 SU (alert, not enforceable) | all year | SW3 |
| pH | maximum | ≤ 9 SU (alert, not enforceable) | all year | SW3 |
| Solids, total suspended | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW3 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW3 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW3 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW3 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW3 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) (alert, not enforceable) | all year | SW3 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) (alert, not enforceable) | all year | SW3 |
| pH | minimum | ≥ 6 SU (alert, not enforceable) | all year | SW4 |
| pH | maximum | ≤ 9 SU (alert, not enforceable) | all year | SW4 |
| Solids, total suspended | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW4 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW4 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW4 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW4 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW4 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) (alert, not enforceable) | all year | SW4 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) (alert, not enforceable) | all year | SW4 |
| pH | minimum | ≥ 6 SU (alert, not enforceable) | all year | SW5 |
| pH | maximum | ≤ 9 SU (alert, not enforceable) | all year | SW5 |
| Solids, total suspended | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW5 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW5 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW5 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW5 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | SW5 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) (alert, not enforceable) | all year | SW5 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) (alert, not enforceable) | all year | SW5 |
Cited limits by parameter: Tennessee's rules and the federal ones.
Same industry: the 10 Metal Mining permits in Tennessee.
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