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Silver Ores, major discharger, Mullan, Idaho. NPDES permit ID0000175 expired Jul 31, 2024; its limits still apply. Last 12 months: no values over a limit, 2 of 196 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 001 |
| Flow rate | monthly average | report only (cfs) | all year | 001 |
| Flow rate | daily maximum | report only (cfs) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 10 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | annual average | ≤ 247 lb/d | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 1 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 1 ug/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .025 lb/d | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .025 lb/d | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 61.3 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 154.9 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ .27 lb/d | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ .69 lb/d | all year | 001 |
| Cadmium, total recoverable | monthly average | ≤ .5 ug/L | all year | 001 |
| Cadmium, total recoverable | daily maximum | ≤ 1.5 ug/L | all year | 001 |
| Cadmium, total recoverable | monthly average | ≤ .002 lb/d | all year | 001 |
| Cadmium, total recoverable | daily maximum | ≤ .006 lb/d | all year | 001 |
| Lead, total recoverable | monthly average | ≤ 13.6 ug/L | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 36.7 ug/L | all year | 001 |
| Lead, total recoverable | monthly average | ≤ .06 lb/d | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ .16 lb/d | all year | 001 |
| Mercury, total recoverable | monthly average | ≤ .05 ug/L | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ .13 ug/L | all year | 001 |
| Mercury, total recoverable | monthly average | ≤ .0002 lb/d | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ .0005 lb/d | all year | 001 |
| Flow | monthly average | report only (cfs) | all year | 001 |
| Flow | daily maximum | report only (cfs) | all year | 001 |
| Toxicity, Chronic | daily maximum | report only (toxic) | all year | 001 |
| TU Static 7Day Chronic Ceriodaphnia dubia | single reading | report only (tox chronic) | all year | 001 |
| TU Static 7Day Chronic Ceriodaphnia dubia | value | report only (tox chronic) | all year | 001 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 002 |
| Flow rate | monthly average | report only (cfs) | all year | 002 |
| Flow rate | daily maximum | report only (cfs) | all year | 002 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 10 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | annual average | ≤ 247 lb/d | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ 1 ug/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ 1 ug/L | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ .025 lb/d | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .025 lb/d | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ 57.6 ug/L | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 145.5 ug/L | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ .271 lb/d | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ .656 lb/d | all year | 002 |
| Cadmium, total recoverable | monthly average | ≤ .5 ug/L | all year | 002 |
| Cadmium, total recoverable | daily maximum | ≤ 1.4 ug/L | all year | 002 |
| Cadmium, total recoverable | monthly average | ≤ .002 lb/d | all year | 002 |
| Cadmium, total recoverable | daily maximum | ≤ .006 lb/d | all year | 002 |
| Lead, total recoverable | monthly average | ≤ 12.8 ug/L | all year | 002 |
| Lead, total recoverable | daily maximum | ≤ 34.4 ug/L | all year | 002 |
| Lead, total recoverable | monthly average | ≤ .06 lb/d | all year | 002 |
| Lead, total recoverable | daily maximum | ≤ .162 lb/d | all year | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 002 |
| Mercury, total recoverable | monthly average | ≤ .036 ug/L | all year | 002 |
| Mercury, total recoverable | daily maximum | ≤ .099 ug/L | all year | 002 |
| Mercury, total recoverable | monthly average | ≤ .0002 lb/d | all year | 002 |
| Mercury, total recoverable | daily maximum | ≤ .0005 lb/d | all year | 002 |
| Flow | monthly average | report only (cfs) | all year | 002 |
| Flow | daily maximum | report only (cfs) | all year | 002 |
| TU Static 7Day Chronic Ceriodaphnia dubia | single reading | report only (tox chronic) | all year | 002 |
| TU Static 7Day Chronic Ceriodaphnia dubia | value | report only (tox chronic) | all year | 002 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 003 |
| Flow rate | monthly average | report only (cfs) | all year | 003 |
| Flow rate | daily maximum | report only (cfs) | all year | 003 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9.9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | annual average | ≤ 188.5 lb/d | all year | 003 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 003 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | monthly average | ≤ 1 ug/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 1 ug/L | all year | 003 |
| Copper, total [as Cu] | monthly average | ≤ .025 lb/d | all year | 003 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ .025 lb/d | all year | 003 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 003 |
| Zinc, total recoverable | monthly average | ≤ 52.9 ug/L | all year | 003 |
| Zinc, total recoverable | daily maximum | ≤ 164.6 ug/L | all year | 003 |
| Zinc, total recoverable | monthly average | ≤ .47 lb/d | all year | 003 |
| Zinc, total recoverable | daily maximum | ≤ 1.47 lb/d | all year | 003 |
| Cadmium, total recoverable | monthly average | ≤ .8 ug/L | all year | 003 |
| Cadmium, total recoverable | daily maximum | ≤ 1.5 ug/L | all year | 003 |
| Cadmium, total recoverable | monthly average | ≤ .007 lb/d | all year | 003 |
| Cadmium, total recoverable | daily maximum | ≤ .013 lb/d | all year | 003 |
| Lead, total recoverable | monthly average | ≤ 18.6 ug/L | all year | 003 |
| Lead, total recoverable | daily maximum | ≤ 24.9 ug/L | all year | 003 |
| Lead, total recoverable | monthly average | ≤ .17 lb/d | all year | 003 |
| Lead, total recoverable | daily maximum | ≤ .22 lb/d | all year | 003 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 003 |
| Mercury, total recoverable | monthly average | ≤ .01 ug/L | all year | 003 |
| Mercury, total recoverable | daily maximum | ≤ .04 ug/L | all year | 003 |
| Mercury, total recoverable | monthly average | ≤ .0001 lb/d | all year | 003 |
| Mercury, total recoverable | daily maximum | ≤ .0004 lb/d | all year | 003 |
| Flow | monthly average | report only (cfs) | all year | 003 |
| Flow | daily maximum | report only (cfs) | all year | 003 |
| TU Static 7Day Chronic Ceriodaphnia dubia | single reading | report only (tox chronic) | all year | 003 |
| TU Static 7Day Chronic Ceriodaphnia dubia | value | report only (tox chronic) | all year | 003 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun–Nov | REC1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Nov | REC1 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun–Nov | REC1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Nov | REC1 |
| pH | instantaneous minimum | report only (SU) | all year | REC1 |
| pH | instantaneous maximum | report only (SU) | all year | REC1 |
| pH | instantaneous minimum | report only (SU) | all year | REC1 |
| pH | instantaneous maximum | report only (SU) | all year | REC1 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC1 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | REC1 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC1 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC1 |
| Calcium, dissolved [as Ca] | daily maximum | report only (mg/L) | all year | REC1 |
| Magnesium, dissolved [as Mg] | daily maximum | report only (mg/L) | all year | REC1 |
| Sodium, dissolved [as Na] | instantaneous maximum | report only (mg/L) | all year | REC1 |
| Potassium, dissolved [as K] | daily maximum | report only (mg/L) | all year | REC1 |
| Chloride, dissolved in water | daily maximum | report only (mg/L) | all year | REC1 |
| Sulfate, dissolved [as SO4] | daily maximum | report only (mg/L) | all year | REC1 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | REC1 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | REC1 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC1 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC1 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | REC1 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | REC1 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | REC1 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | REC1 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | REC1 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | REC1 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun–Nov | REC2 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Nov | REC2 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun–Nov | REC2 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Nov | REC2 |
| pH | instantaneous minimum | report only (SU) | all year | REC2 |
| pH | instantaneous maximum | report only (SU) | all year | REC2 |
| pH | instantaneous minimum | report only (SU) | all year | REC2 |
| pH | instantaneous maximum | report only (SU) | all year | REC2 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC2 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | REC2 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC2 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC2 |
| Calcium, dissolved [as Ca] | daily maximum | report only (mg/L) | all year | REC2 |
| Magnesium, dissolved [as Mg] | daily maximum | report only (mg/L) | all year | REC2 |
| Sodium, dissolved [as Na] | instantaneous maximum | report only (mg/L) | all year | REC2 |
| Potassium, dissolved [as K] | daily maximum | report only (mg/L) | all year | REC2 |
| Chloride, dissolved in water | daily maximum | report only (mg/L) | all year | REC2 |
| Sulfate, dissolved [as SO4] | daily maximum | report only (mg/L) | all year | REC2 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | REC2 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | REC2 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC2 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC2 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | REC2 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | REC2 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | REC2 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | REC2 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | REC2 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | REC2 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun–Nov | REC3 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Nov | REC3 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun–Nov | REC3 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun–Nov | REC3 |
| pH | instantaneous minimum | report only (SU) | all year | REC3 |
| pH | instantaneous maximum | report only (SU) | all year | REC3 |
| pH | instantaneous minimum | report only (SU) | all year | REC3 |
| pH | instantaneous maximum | report only (SU) | all year | REC3 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC3 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | REC3 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC3 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | REC3 |
| Calcium, dissolved [as Ca] | daily maximum | report only (mg/L) | all year | REC3 |
| Magnesium, dissolved [as Mg] | daily maximum | report only (mg/L) | all year | REC3 |
| Sodium, dissolved [as Na] | instantaneous maximum | report only (mg/L) | all year | REC3 |
| Potassium, dissolved [as K] | daily maximum | report only (mg/L) | all year | REC3 |
| Chloride, dissolved in water | daily maximum | report only (mg/L) | all year | REC3 |
| Sulfate, dissolved [as SO4] | daily maximum | report only (mg/L) | all year | REC3 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | REC3 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | REC3 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC3 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | REC3 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | REC3 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | REC3 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | REC3 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | REC3 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | REC3 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | REC3 |
Cited limits by parameter: Idaho's rules and the federal ones.
Same industry: the 10 Metal Mining permits in Idaho.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/ID0000175 · MCP: https://passage-data.com/mcp