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Gold Ores, major discharger, Lead, South Dakota. NPDES permit SD0000043 expired Sep 30, 2009; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | 30-day average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | 30-day average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 75 deg F | all year | 001 |
| Flow rate | daily minimum | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| Flow rate | 30-day average | report only (MGD) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 8.8 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 10 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Jan, Feb, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Oct, Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct, Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12.5 lb/d | Jan, Feb, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13.6 lb/d | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.7 lb/d | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15.5 lb/d | Oct, Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23.4 lb/d | Jan, Feb, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25.4 lb/d | Mar–May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.2 lb/d | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27.7 lb/d | Oct, Nov | 001 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, weak acid, dissociable | 30-day average | ≤ 3.9 lb/d | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 3.9 lb/d | all year | 001 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | maximum | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Arsenic, total recoverable | 30-day average | ≤ 9.6 lb/d | all year | 001 |
| Arsenic, total recoverable | daily maximum | ≤ 9.6 lb/d | all year | 001 |
| Selenium, total recoverable | 30-day average | ≤ 5 ug/L | all year | 001 |
| Selenium, total recoverable | daily maximum | ≤ 20 ug/L | all year | 001 |
| Selenium, total recoverable | 30-day average | report only (lb/d) | all year | 001 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | 30-day average | report only (lb/d) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Silver total recoverable | 30-day average | ≤ 1 lb/d | all year | 001 |
| Silver total recoverable | daily maximum | ≤ 1 lb/d | all year | 001 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | 30-day average | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | 30-day average | report only (lb/d) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | 30-day average | ≤ 3.6 lb/d | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 3.6 lb/d | all year | 001 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | 30-day average | report only (lb/d) | all year | 001 |
| Chromium, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | 30-day average | ≤ 3.9 lb/d | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 3.9 lb/d | all year | 001 |
| Mercury, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Mercury, total recoverable | 30-day average | ≤ .031 lb/d | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ .031 lb/d | all year | 001 |
| Hydrocarbons, petroleum | daily maximum | ≤ 10 mg/L | all year | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| pH | daily maximum | report only (SU) | all year | MTL |
| pH | daily maximum | report only (SU) | all year | MTL |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | MTL |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | MTL |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | MTL |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | MTL |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | MTL |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | MTL |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | MTL |
| Hydrocarbons, petroleum | daily maximum | report only (mg/L) | all year | MTL |
| Hydrocarbons, petroleum | daily maximum | report only (mg/L) | all year | MTL |
Cited limits by parameter: South Dakota's rules and the federal ones.
Same industry: the 5 Metal Mining permits in South Dakota.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/SD0000043 · MCP: https://passage-data.com/mcp