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Gold Ores, Central City, South Dakota. NPDES permit SD0025933 expired Mar 31, 2016; 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 | 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 |
| Conductivity | 30-day average | report only (umho/cm) | all year | 003 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 003 |
| pH | daily minimum | report only (SU) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 003 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | 003 |
| Cyanide, weak acid, dissociable | daily maximum | 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 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Iron, 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 | report only (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 [as Hg] | 30-day average | report only (ug/L) | all year | 003 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 003 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 003 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 005 |
| Flow rate | 30-day average | report only (MGD) | all year | 005 |
| Flow rate | daily maximum | report only (MGD) | all year | 005 |
| Conductivity | 30-day average | report only (umho/cm) | all year | 005 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 005 |
| pH | daily minimum | report only (SU) | all year | 005 |
| pH | daily maximum | report only (SU) | all year | 005 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 005 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | 005 |
| Cyanide, weak acid, dissociable | daily maximum | report only (mg/L) | all year | 005 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 005 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Selenium, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 005 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Floating solids, waste or visible foam-visual | daily maximum | report only (N=0;Y=1) | all year | 005 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 005 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 005 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 005 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 005 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 005 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 008 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 008 |
| Flow rate | 30-day average | report only (MGD) | all year | 008 |
| Flow rate | daily maximum | report only (MGD) | all year | 008 |
| Conductivity | 30-day average | ≤ 2500 umho/cm | all year | 008 |
| Conductivity | daily maximum | ≤ 4375 umho/cm | all year | 008 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | all year | 008 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 17.5 mg/L | all year | 008 |
| pH | daily minimum | ≥ 6.5 SU | all year | 008 |
| pH | daily maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | 30-day average | ≤ 10 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 17.5 mg/L | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 008 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.75 mg/L | all year | 008 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 008 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | 008 |
| Cyanide, weak acid, dissociable | daily maximum | report only (mg/L) | all year | 008 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 008 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Selenium, total recoverable | 30-day average | ≤ 4.6 ug/L | all year | 008 |
| Selenium, total recoverable | daily maximum | ≤ 12.8 ug/L | all year | 008 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 008 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 008 |
| Solids, total dissolved | 30-day average | ≤ 2500 mg/L | all year | 008 |
| Solids, total dissolved | daily maximum | ≤ 4375 mg/L | all year | 008 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 008 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 008 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 008 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 013 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 013 |
| Flow rate | daily maximum | report only (MGD) | all year | 013 |
| Flow rate | 30-day average | report only (MGD) | all year | 013 |
| Conductivity | 30-day average | ≤ 2828 umho/cm | all year | 013 |
| Conductivity | daily maximum | ≤ 4375 umho/cm | all year | 013 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 013 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | all year | 013 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 17.5 mg/L | all year | 013 |
| pH | daily minimum | ≥ 6.5 SU | all year | 013 |
| pH | daily maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | 30-day average | ≤ 10 mg/L | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 17.5 mg/L | all year | 013 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 013 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.81 lb/d | Mar, Apr | 013 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.68 lb/d | Jan, Feb, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 013 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.7 lb/d | Mar, Apr | 013 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.94 lb/d | Jan, Feb, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 013 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 013 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 013 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | 013 |
| Cyanide, weak acid, dissociable | daily maximum | report only (mg/L) | all year | 013 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 013 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Selenium, total recoverable | 30-day average | ≤ 4.6 ug/L | all year | 013 |
| Selenium, total recoverable | daily maximum | ≤ 12.8 ug/L | all year | 013 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 013 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 013 |
| Solids, total dissolved | 30-day average | ≤ 2908 mg/L | all year | 013 |
| Solids, total dissolved | daily maximum | ≤ 4375 mg/L | all year | 013 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 013 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 013 |
| Flow, process wastewater | monthly total | ≤ 0 gal/mo | all year | 013 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 013 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 013 |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | daily maximum | ≤ 0 pass=0;fail=1 | all year | 013 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 014 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 014 |
| Flow rate | daily maximum | report only (MGD) | all year | 014 |
| Flow rate | 30-day average | report only (MGD) | all year | 014 |
| Conductivity | 30-day average | ≤ 2500 umho/cm | all year | 014 |
| Conductivity | daily maximum | ≤ 4375 umho/cm | all year | 014 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 014 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 10 mg/L | all year | 014 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 17.5 mg/L | all year | 014 |
| pH | daily minimum | ≥ 6.5 SU | all year | 014 |
| pH | daily maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | 30-day average | ≤ 10 mg/L | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 17.5 mg/L | all year | 014 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 014 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.68 lb/d | Jan, Feb, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 014 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.81 lb/d | Mar, Apr | 014 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.94 lb/d | Jan, Feb, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 014 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.7 lb/d | Mar, Apr | 014 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 014 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 014 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | 014 |
| Cyanide, weak acid, dissociable | daily maximum | report only (mg/L) | all year | 014 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 014 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | Jan–Nov | 014 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | Jan–Nov | 014 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Selenium, total recoverable | 30-day average | ≤ 4.6 ug/L | all year | 014 |
| Selenium, total recoverable | daily maximum | ≤ 12.8 ug/L | all year | 014 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 014 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 014 |
| Solids, total dissolved | 30-day average | ≤ 2500 mg/L | all year | 014 |
| Solids, total dissolved | daily maximum | ≤ 4375 mg/L | all year | 014 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 014 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 014 |
| Flow, process wastewater | monthly total | ≤ 0 gal/mo | all year | 014 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 014 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 014 |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | daily maximum | ≤ 0 pass=0;fail=1 | all year | 014 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | SW1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | SW1 |
| Flow rate | 30-day average | report only (MGD) | all year | SW1 |
| Flow rate | daily maximum | report only (MGD) | all year | SW1 |
| pH | daily minimum | report only (SU) | all year | SW1 |
| pH | daily maximum | report only (SU) | all year | SW1 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | SW1 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | SW1 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | SW1 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | SW1 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | SW1 |
| Cyanide, weak acid, dissociable | daily maximum | report only (mg/L) | all year | SW1 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | SW1 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | SW1 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Selenium, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | SW1 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | SW1 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | SW1 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | SW1 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | SW1 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | SW1 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | SW1 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | SW6 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | SW6 |
| Flow rate | 30-day average | report only (MGD) | all year | SW6 |
| Flow rate | daily maximum | report only (MGD) | all year | SW6 |
| pH | daily minimum | report only (SU) | all year | SW6 |
| pH | daily maximum | report only (SU) | all year | SW6 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | SW6 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | SW6 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | SW6 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | SW6 |
| Cyanide, weak acid, dissociable | 30-day average | report only (mg/L) | all year | SW6 |
| Cyanide, weak acid, dissociable | daily maximum | report only (mg/L) | all year | SW6 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | SW6 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | SW6 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Selenium, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Silver total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Chromium, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | SW6 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | SW6 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | SW6 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | SW6 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | SW6 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | SW6 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | SW6 |
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/SD0025933 · MCP: https://passage-data.com/mcp