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Copper Ores, major discharger, White Sulphur Springs (Historical), Montana. NPDES permit MT0031909 expired May 31, 2025; 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 | monthly 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 | value | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | value | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | value | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | value | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 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 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | monthly average | ≤ .09 mg/L | Jul–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Nitrogen, total [as N] | monthly average | ≤ .43 lb/d | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .18 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .37 mg/L | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 1.5 mg/L | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 1.5 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .012 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .06 lb/d | all year | 001 |
| Cyanide, total [as CN] | monthly average | ≤ .6 ug/L | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ .6 ug/L | all year | 001 |
| Arsenic, total recoverable | monthly average | ≤ 1 ug/L | all year | 001 |
| Arsenic, total recoverable | daily maximum | ≤ 1 ug/L | all year | 001 |
| Iron, total recoverable | monthly average | ≤ 205 ug/L | all year | 001 |
| Iron, total recoverable | daily maximum | ≤ 416 ug/L | all year | 001 |
| Selenium, total recoverable | monthly average | ≤ .6 ug/L | all year | 001 |
| Selenium, total recoverable | daily maximum | ≤ 1.2 ug/L | all year | 001 |
| Thallium, total recoverable | monthly average | ≤ .04 ug/L | all year | 001 |
| Thallium, total recoverable | daily maximum | ≤ .04 ug/L | all year | 001 |
| Beryllium, total recoverable [as Be] | monthly average | ≤ .8 ug/L | all year | 001 |
| Beryllium, total recoverable [as Be] | daily maximum | ≤ .8 ug/L | all year | 001 |
| Barium, total recoverable | monthly average | ≤ 150 ug/L | all year | 001 |
| Barium, total recoverable | daily maximum | ≤ 150 ug/L | all year | 001 |
| Nickel, total recoverable | monthly average | ≤ 7.8 ug/L | all year | 001 |
| Nickel, total recoverable | daily maximum | ≤ 15 ug/L | all year | 001 |
| Silver total recoverable | monthly average | ≤ .05 ug/L | all year | 001 |
| Silver total recoverable | daily maximum | ≤ .1 ug/L | all year | 001 |
| Strontium, total [as Sr] | monthly average | ≤ 600 ug/L | all year | 001 |
| Strontium, total [as Sr] | daily maximum | ≤ 600 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 4.6 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 9.2 ug/L | all year | 001 |
| Aluminum, dissolved [as Al] | monthly average | ≤ 11 ug/L | all year | 001 |
| Aluminum, dissolved [as Al] | daily maximum | ≤ 21 ug/L | all year | 001 |
| Cadmium, total recoverable | monthly average | ≤ .11 ug/L | all year | 001 |
| Cadmium, total recoverable | daily maximum | ≤ .23 ug/L | all year | 001 |
| Lead, total recoverable | monthly average | ≤ .5 ug/L | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 1 ug/L | all year | 001 |
| Chromium, total recoverable | monthly average | ≤ 15 ug/L | all year | 001 |
| Chromium, total recoverable | daily maximum | ≤ 15 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 1.4 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 2.8 ug/L | all year | 001 |
| Antimony, total recoverable | monthly average | ≤ 1 ug/L | all year | 001 |
| Antimony, total recoverable | daily maximum | ≤ 1 ug/L | all year | 001 |
| Uranium, total | monthly average | ≤ .7 ug/L | all year | 001 |
| Uranium, total | daily maximum | ≤ .7 ug/L | all year | 001 |
| Mercury, total recoverable | monthly average | ≤ .0005 ug/L | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ .0005 ug/L | all year | 001 |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | value | report only (%) | all year | 001 |
| IC25 Static Renewal 7 Day Chronic Pimephales | value | report only (%) | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 002 |
| Flow rate | daily maximum | report only (MGD) | all year | 002 |
| Turbidity | monthly average | report only (NTU) | all year | 002 |
| Turbidity | maximum | report only (NTU) | all year | 002 |
| pH | minimum | report only (SU) | all year | 002 |
| pH | maximum | report only (SU) | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Flow rate | monthly average | report only (MGD) | all year | 003 |
| Flow rate | monthly average | report only (MGD) | all year | 003 |
| Flow rate | daily maximum | report only (MGD) | all year | 003 |
| Flow rate | daily maximum | report only (MGD) | all year | 003 |
| Turbidity | monthly average | report only (NTU) | all year | 003 |
| Turbidity | maximum | report only (NTU) | all year | 003 |
| Turbidity | monthly average | report only (NTU) | all year | 003 |
| Turbidity | daily maximum | report only (NTU) | all year | 003 |
| pH | minimum | report only (SU) | all year | 003 |
| pH | maximum | report only (SU) | all year | 003 |
| pH | minimum | report only (SU) | all year | 003 |
| pH | maximum | report only (SU) | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Iron, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 003 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 003 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 003 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 003 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Aluminum, dissolved [as Al] | monthly average | report only (ug/L) | all year | 003 |
| Aluminum, dissolved [as Al] | daily maximum | report only (ug/L) | all year | 003 |
| Aluminum, dissolved [as Al] | semi-annual average | report only (ug/L) | all year | 003 |
| Aluminum, dissolved [as Al] | maximum | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Lead, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Mercury, total recoverable | maximum | report only (ug/L) | all year | 003 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 003 |
| Flow rate | monthly average | report only (MGD) | all year | 004 |
| Flow rate | daily maximum | report only (MGD) | all year | 004 |
| Turbidity | monthly average | report only (NTU) | all year | 004 |
| Turbidity | maximum | report only (NTU) | all year | 004 |
| pH | minimum | report only (SU) | all year | 004 |
| pH | maximum | report only (SU) | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Flow rate | monthly average | report only (MGD) | all year | 005 |
| Flow rate | daily maximum | report only (MGD) | all year | 005 |
| Turbidity | monthly average | report only (NTU) | all year | 005 |
| Turbidity | maximum | report only (NTU) | all year | 005 |
| pH | minimum | report only (SU) | all year | 005 |
| pH | maximum | report only (SU) | all year | 005 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Flow rate | monthly average | report only (MGD) | all year | 006 |
| Flow rate | monthly average | report only (MGD) | all year | 006 |
| Flow rate | daily maximum | report only (MGD) | all year | 006 |
| Flow rate | daily maximum | report only (MGD) | all year | 006 |
| Turbidity | monthly average | report only (NTU) | all year | 006 |
| Turbidity | maximum | report only (NTU) | all year | 006 |
| Turbidity | monthly average | report only (NTU) | all year | 006 |
| Turbidity | daily maximum | report only (NTU) | all year | 006 |
| pH | minimum | report only (SU) | all year | 006 |
| pH | maximum | report only (SU) | all year | 006 |
| pH | minimum | report only (SU) | all year | 006 |
| pH | maximum | report only (SU) | all year | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 006 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 006 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 006 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Arsenic, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Iron, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Iron, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Iron, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Selenium, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 006 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 006 |
| Beryllium, total recoverable [as Be] | semi-annual average | report only (ug/L) | all year | 006 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 006 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Nickel, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 006 |
| Silver total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 006 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Zinc, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Aluminum, dissolved [as Al] | monthly average | report only (ug/L) | all year | 006 |
| Aluminum, dissolved [as Al] | maximum | report only (ug/L) | all year | 006 |
| Aluminum, dissolved [as Al] | semi-annual average | report only (ug/L) | all year | 006 |
| Aluminum, dissolved [as Al] | maximum | report only (ug/L) | all year | 006 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Cadmium, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Lead, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Copper, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Antimony, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Mercury, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Mercury, total recoverable | semi-annual average | report only (ug/L) | all year | 006 |
| Mercury, total recoverable | maximum | report only (ug/L) | all year | 006 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 006 |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | all year | 006 |
| Chemical Oxygen Demand [COD] | semi-annual average | report only (mg/L) | all year | 006 |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | all year | 006 |
| Flow rate | monthly average | report only (MGD) | all year | 007 |
| Flow rate | daily maximum | report only (MGD) | all year | 007 |
| Turbidity | monthly average | report only (NTU) | all year | 007 |
| Turbidity | maximum | report only (NTU) | all year | 007 |
| pH | minimum | report only (SU) | all year | 007 |
| pH | maximum | report only (SU) | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 007 |
| Flow rate | monthly average | report only (MGD) | all year | 008 |
| Flow rate | daily maximum | report only (MGD) | all year | 008 |
| Turbidity | monthly average | report only (NTU) | all year | 008 |
| Turbidity | maximum | report only (NTU) | all year | 008 |
| pH | minimum | report only (SU) | all year | 008 |
| pH | maximum | report only (SU) | all year | 008 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Flow rate | monthly average | report only (MGD) | all year | 009 |
| Flow rate | monthly average | report only (MGD) | all year | 009 |
| Flow rate | daily maximum | report only (MGD) | all year | 009 |
| Flow rate | daily maximum | report only (MGD) | all year | 009 |
| Turbidity | monthly average | report only (NTU) | all year | 009 |
| Turbidity | maximum | report only (NTU) | all year | 009 |
| pH | minimum | report only (SU) | all year | 009 |
| pH | maximum | report only (SU) | all year | 009 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 009 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 009 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 009 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 009 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Iron, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 009 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 009 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 009 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Aluminum, dissolved [as Al] | monthly average | report only (ug/L) | all year | 009 |
| Aluminum, dissolved [as Al] | maximum | report only (ug/L) | all year | 009 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Lead, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 009 |
| Mercury, total recoverable | maximum | report only (ug/L) | all year | 009 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 009 |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | all year | 009 |
| Flow rate | monthly average | report only (MGD) | all year | 010 |
| Flow rate | daily maximum | report only (MGD) | all year | 010 |
| Turbidity | monthly average | report only (NTU) | all year | 010 |
| Turbidity | maximum | report only (NTU) | all year | 010 |
| pH | minimum | report only (SU) | all year | 010 |
| pH | maximum | report only (SU) | all year | 010 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Flow rate | monthly average | report only (MGD) | all year | 011 |
| Flow rate | monthly average | report only (MGD) | all year | 011 |
| Flow rate | daily maximum | report only (MGD) | all year | 011 |
| Flow rate | daily maximum | report only (MGD) | all year | 011 |
| Turbidity | monthly average | report only (NTU) | all year | 011 |
| Turbidity | maximum | report only (NTU) | all year | 011 |
| Turbidity | monthly average | report only (NTU) | all year | 011 |
| Turbidity | daily maximum | report only (NTU) | all year | 011 |
| pH | minimum | report only (SU) | all year | 011 |
| pH | maximum | report only (SU) | all year | 011 |
| pH | minimum | report only (SU) | all year | 011 |
| pH | maximum | report only (SU) | all year | 011 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 011 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 011 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 011 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, total [as N] | semi-annual average | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 011 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Arsenic, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Iron, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Iron, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Iron, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Selenium, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Beryllium, total recoverable [as Be] | monthly average | report only (ug/L) | all year | 011 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 011 |
| Beryllium, total recoverable [as Be] | semi-annual average | report only (ug/L) | all year | 011 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 011 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Nickel, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 011 |
| Silver total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Aluminum, dissolved [as Al] | monthly average | report only (ug/L) | all year | 011 |
| Aluminum, dissolved [as Al] | maximum | report only (ug/L) | all year | 011 |
| Aluminum, dissolved [as Al] | semi-annual average | report only (ug/L) | all year | 011 |
| Aluminum, dissolved [as Al] | maximum | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Lead, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Copper, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Antimony, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Antimony, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Mercury, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Mercury, total recoverable | semi-annual average | report only (ug/L) | all year | 011 |
| Mercury, total recoverable | maximum | report only (ug/L) | all year | 011 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 011 |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | all year | 011 |
| Chemical Oxygen Demand [COD] | semi-annual average | report only (mg/L) | all year | 011 |
| Chemical Oxygen Demand [COD] | maximum | report only (mg/L) | all year | 011 |
| Flow rate | monthly average | report only (MGD) | all year | 012 |
| Flow rate | daily maximum | report only (MGD) | all year | 012 |
| Turbidity | monthly average | report only (NTU) | all year | 012 |
| Turbidity | maximum | report only (NTU) | all year | 012 |
| pH | minimum | report only (SU) | all year | 012 |
| pH | maximum | report only (SU) | all year | 012 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 012 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 012 |
| Flow rate | monthly average | report only (MGD) | all year | 013 |
| Flow rate | daily maximum | report only (MGD) | all year | 013 |
| Turbidity | monthly average | report only (NTU) | all year | 013 |
| Turbidity | maximum | report only (NTU) | all year | 013 |
| pH | minimum | report only (SU) | all year | 013 |
| pH | maximum | report only (SU) | all year | 013 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 013 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 013 |
| Flow rate | monthly average | report only (MGD) | all year | 014 |
| Flow rate | daily maximum | report only (MGD) | all year | 014 |
| Turbidity | monthly average | report only (NTU) | all year | 014 |
| Turbidity | maximum | report only (NTU) | all year | 014 |
| Turbidity | monthly average | report only (NTU) | all year | 014 |
| Turbidity | daily maximum | report only (NTU) | all year | 014 |
| pH | minimum | report only (SU) | all year | 014 |
| pH | maximum | report only (SU) | all year | 014 |
| pH | minimum | report only (SU) | all year | 014 |
| pH | maximum | report only (SU) | all year | 014 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
Cited limits by parameter: Montana's rules and the federal ones.
Same industry: the 7 Metal Mining permits in Montana.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MT0031909 · MCP: https://passage-data.com/mcp