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Copper Ores, major discharger, Wakefield, Michigan. NPDES permit MI0058969 expired Oct 1, 2024; its limits still apply. Last 12 months: no values over a limit, 2 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | = 7 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily 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, ammonia total [as N] | monthly average | = 3.3 mg/L | Apr, May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 2 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 7.4 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 4.3 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr, May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 14 lb/d | Apr, May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 8.4 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 31 lb/d | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 18 lb/d | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Apr, May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Sep | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 4.2 lb/d | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | monthly average | ≤ 10 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 001 |
| Arsenic, total [as As] | monthly average | ≤ .04 lb/d | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (lb/d) | all year | 001 |
| Barium, total [as Ba] | monthly average | ≤ 160 ug/L | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (ug/L) | all year | 001 |
| Barium, total [as Ba] | monthly average | ≤ .68 lb/d | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (lb/d) | all year | 001 |
| Beryllium, total [as Be] | monthly average | ≤ .22 ug/L | all year | 001 |
| Beryllium, total [as Be] | daily maximum | report only (ug/L) | all year | 001 |
| Beryllium, total [as Be] | monthly average | ≤ .0009 lb/d | all year | 001 |
| Beryllium, total [as Be] | daily maximum | report only (lb/d) | all year | 001 |
| Boron, total [as B] | monthly average | ≤ 5000 ug/L | all year | 001 |
| Boron, total [as B] | daily maximum | report only (ug/L) | all year | 001 |
| Boron, total [as B] | monthly average | ≤ 21 lb/d | all year | 001 |
| Boron, total [as B] | daily maximum | report only (lb/d) | all year | 001 |
| Cadmium, total [as Cd] | monthly average | ≤ 2.3 ug/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ 6.5 ug/L | all year | 001 |
| Cadmium, total [as Cd] | monthly average | ≤ .01 lb/d | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ .03 lb/d | all year | 001 |
| Chromium, total [as Cr] | monthly average | ≤ 51 ug/L | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | monthly average | ≤ .22 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (lb/d) | all year | 001 |
| Cobalt, total [as Co] | monthly average | ≤ 100 ug/L | all year | 001 |
| Cobalt, total [as Co] | daily maximum | report only (ug/L) | all year | 001 |
| Cobalt, total [as Co] | monthly average | ≤ .42 lb/d | all year | 001 |
| Cobalt, total [as Co] | daily maximum | report only (lb/d) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 6 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 17 ug/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .03 lb/d | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .07 lb/d | all year | 001 |
| Lead, total [as Pb] | monthly average | ≤ 43 ug/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | monthly average | ≤ .18 lb/d | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (lb/d) | all year | 001 |
| Manganese, total [as Mn] | monthly average | ≤ 840 ug/L | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (ug/L) | all year | 001 |
| Manganese, total [as Mn] | monthly average | ≤ 3.5 lb/d | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (lb/d) | all year | 001 |
| Molybdenum, total [as Mo] | monthly average | ≤ 3200 ug/L | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 001 |
| Molybdenum, total [as Mo] | monthly average | ≤ 13 lb/d | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (lb/d) | all year | 001 |
| Nickel, total [as Ni] | monthly average | ≤ 26 ug/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | monthly average | ≤ .11 lb/d | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (lb/d) | all year | 001 |
| Silver, total [as Ag] | monthly average | ≤ .6 ug/L | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | monthly average | ≤ .003 lb/d | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (lb/d) | all year | 001 |
| Strontium, total [as Sr] | monthly average | ≤ 21000 ug/L | all year | 001 |
| Strontium, total [as Sr] | daily maximum | ≤ 81000 ug/L | all year | 001 |
| Strontium, total [as Sr] | monthly average | ≤ 88 lb/d | all year | 001 |
| Strontium, total [as Sr] | daily maximum | ≤ 340 lb/d | all year | 001 |
| Vanadium, total [as V] | monthly average | ≤ 27 ug/L | all year | 001 |
| Vanadium, total [as V] | daily maximum | report only (ug/L) | all year | 001 |
| Vanadium, total [as V] | monthly average | ≤ .11 lb/d | all year | 001 |
| Vanadium, total [as V] | daily maximum | report only (lb/d) | all year | 001 |
| Zinc, total [as Zn] | monthly average | ≤ 110 ug/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 220 ug/L | all year | 001 |
| Zinc, total [as Zn] | monthly average | ≤ .47 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .93 lb/d | all year | 001 |
| Antimony, total [as Sb] | monthly average | ≤ 130 ug/L | all year | 001 |
| Antimony, total [as Sb] | daily maximum | report only (ug/L) | all year | 001 |
| Antimony, total [as Sb] | monthly average | ≤ .55 lb/d | all year | 001 |
| Antimony, total [as Sb] | daily maximum | report only (lb/d) | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ 5 ug/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ .02 lb/d | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (lb/d) | all year | 001 |
| Toxicity, choice of species | monthly average | ≤ 1 tox chronic | all year | 001 |
| Toxicity, choice of species | daily maximum | report only (tox chronic) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | = 38 ug/L | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | all year | 001 |
| Solids, total dissolved | monthly average | = 540 mg/L | Apr, May | 001 |
| Solids, total dissolved | monthly average | = 500 mg/L | Jan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Solids, total dissolved | daily maximum | = 830 mg/L | Apr, May | 001 |
| Solids, total dissolved | daily maximum | = 750 mg/L | Jan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Solids, total dissolved | monthly average | = 2300 lb/d | Apr, May | 001 |
| Solids, total dissolved | monthly average | = 2100 lb/d | Jan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Solids, total dissolved | daily maximum | = 3500 lb/d | Apr, May | 001 |
| Solids, total dissolved | daily maximum | = 3200 lb/d | Jan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Mercury, total [as Hg] | monthly average | ≤ 1.3 ng/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .0000055 lb/d | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 001 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 001 |
| TU Static 24 Hr Acute Pimephales promelas | daily maximum | ≤ 1 tox acute | all year | 001 |
| Static 48 Hr Chronic Pimphales Promelas | monthly average | ≤ 1 tox chronic | all year | 001 |
| Static 48 Hr Chronic Pimphales Promelas | daily maximum | report only (tox chronic) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 7 mg/L | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| pH | daily maximum | ≤ 10 SU | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Solids, total suspended | monthly average | ≤ 40 mg/L | Oct–Dec | 002 |
| Solids, total suspended | monthly average | ≤ 70 mg/L | Mar–Jun | 002 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Oct–Dec | 002 |
| Solids, total suspended | 7-day average | ≤ 100 mg/L | Mar–Jun | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | Mar, Apr, May, Jun, Oct, Nov, Dec | 002 |
Cited limits by parameter: Michigan's rules and the federal ones.
Same industry: the 6 Metal Mining permits in Michigan.
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