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Gold Ores, major discharger, Lead, South Dakota. NPDES permit SD0026905 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. centigrade | 30-day average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Flow rate | 30-day average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| pH | minimum | ≥ 6.6 SU | all year | 001 |
| pH | maximum | ≤ 8.6 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 53 mg/L | all year | 001 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily 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 |
| Selenium, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | 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 |
| Hydrocarbons, petroleum | daily maximum | ≤ 10 mg/L | all year | 001 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 003 |
| Flow rate | 30-day average | report only (MGD) | all year | 003 |
| Flow rate | daily maximum | report only (MGD) | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 90 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 158 mg/L | all year | 003 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | 003 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 003 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 003 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 003 |
| Mercury, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Hydrocarbons, petroleum | daily maximum | ≤ 10 mg/L | all year | 003 |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 003 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 003 |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | daily maximum | ≤ 0 pass=0;fail=1 | all year | 003 |
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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Your permit document is the final word. As JSON: /api/v1/permits/SD0026905 · MCP: https://passage-data.com/mcp