Mesabi Metallics Company LLC

NPDES permit MN0068241 · Minor NON-POTW · effective, expires 2031-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 21 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MN permits in EPA's filings — check your permit).

Limits in force (195)

OutfallParameterStatisticLimitMonths
D006Specific conductanceQB report only Mar, Jun, Sep, Dec
D006pHMO MIN >= 6 SU all year
D006pHMO MAX <= 9 SU all year
D006Solids, total suspendedMO AVG <= 20 mg/L all year
D006Solids, total suspendedQB report only Mar, Jun, Sep, Dec
D006Solids, total suspendedMO MAX <= 30 mg/L all year
D006Nitrogen, total [as N]ANNL MAX report only Dec
D006Nitrogen, Kjeldahl, total [as N]ANNL MAX report only Dec
D006Nitrite + Nitrate total [as N]ANNL MAX report only Dec
D006Phosphorus, total [as P]MO AVG report only all year
D006Phosphorus, total [as P]MO MAX report only all year
D006Sulfate, total [as SO4]QB report only Mar, Jun, Sep, Dec
D006Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
D006Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
D006Oil and greaseMO AVG report only all year
D006Hardness, Ca Mg Calculated [mg/L as CaCO3]QB report only Mar, Jun, Sep, Dec
D006Flow, in conduit or thru treatment plantMO AVG report only all year
D006Flow, in conduit or thru treatment plantMO TOTAL report only all year
D006Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
D006Mercury, dissolved [as Hg]QB report only Mar, Jun, Sep, Dec
D006Mercury, total [as Hg]QB report only Mar, Jun, Sep, Dec
D007Specific conductanceQB report only Mar, Jun, Sep, Dec
D007pHMO MIN >= 6 SU all year
D007pHMO MAX <= 9 SU all year
D007Solids, total suspendedMO AVG <= 20 mg/L all year
D007Solids, total suspendedQB report only Mar, Jun, Sep, Dec
D007Solids, total suspendedMO MAX <= 30 mg/L all year
D007Nitrogen, total [as N]ANNL MAX report only Dec
D007Nitrogen, Kjeldahl, total [as N]ANNL MAX report only Dec
D007Nitrite + Nitrate total [as N]ANNL MAX report only Dec
D007Phosphorus, total [as P]MO AVG report only all year
D007Phosphorus, total [as P]MO MAX report only all year
D007Sulfate, total [as SO4]QB report only Mar, Jun, Sep, Dec
D007Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
D007Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
D007Oil and greaseMO AVG report only all year
D007Hardness, Ca Mg Calculated [mg/L as CaCO3]QB report only Mar, Jun, Sep, Dec
D007Flow, in conduit or thru treatment plantMO AVG report only all year
D007Flow, in conduit or thru treatment plantMO TOTAL report only all year
D007Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
D007Mercury, dissolved [as Hg]QB report only Mar, Jun, Sep, Dec
D007Mercury, total [as Hg]QB report only Mar, Jun, Sep, Dec
D008Specific conductanceQB report only all year
D008pHMINIMUM report only Dec
D008pHANNL MAX report only Dec
D008Solids, total suspendedANNL AVG report only Dec
D008Nitrite + Nitrate total [as N]ANNL AVG report only Dec
D008Sulfate, total [as SO4]QB report only all year
D008Arsenic, total [as As]ANNL AVG report only Dec
D008Cadmium, total [as Cd]ANNL AVG report only Dec
D008Copper, total [as Cu]ANNL AVG report only Dec
D008Iron, total [as Fe]ANNL AVG report only Dec
D008Lead, total [as Pb]ANNL AVG report only Dec
D008Nickel, total [as Ni]ANNL AVG report only Dec
D008Silver, total [as Ag]ANNL AVG report only Dec
D008Zinc, total [as Zn]ANNL AVG report only Dec
D008Antimony, total [as Sb]ANNL AVG report only Dec
D008Selenium, total [as Se]ANNL AVG report only Dec
D008Hardness, Ca Mg Calculated [mg/L as CaCO3]ANNL AVG report only Dec
D008Solids, total dissolvedQB report only all year
D008Chemical Oxygen Demand [COD]ANNL AVG report only Dec
D009Specific conductanceQB report only all year
D009pHMINIMUM report only Dec
D009pHANNL MAX report only Dec
D009Solids, total suspendedANNL AVG report only Dec
D009Nitrite + Nitrate total [as N]ANNL AVG report only Dec
D009Sulfate, total [as SO4]QB report only all year
D009Arsenic, total [as As]ANNL AVG report only Dec
D009Cadmium, total [as Cd]ANNL AVG report only Dec
D009Copper, total [as Cu]ANNL AVG report only Dec
D009Iron, total [as Fe]ANNL AVG report only Dec
D009Lead, total [as Pb]ANNL AVG report only Dec
D009Nickel, total [as Ni]ANNL AVG report only Dec
D009Silver, total [as Ag]ANNL AVG report only Dec
D009Zinc, total [as Zn]ANNL AVG report only Dec
D009Antimony, total [as Sb]ANNL AVG report only Dec
D009Selenium, total [as Se]ANNL AVG report only Dec
D009Hardness, Ca Mg Calculated [mg/L as CaCO3]ANNL AVG report only Dec
D009Solids, total dissolvedANNL MAX report only all year
D009Chemical Oxygen Demand [COD]ANNL AVG report only Dec
W010Temperature, water deg. centigradeMO MAX report only Jun, Aug
W010Redox [oxidation reduction potential]MO MIN report only Jun, Aug
W010Redox [oxidation reduction potential]MO MAX report only Jun, Aug
W010Specific conductanceMO MAX report only Jun, Aug
W010Oxygen, dissolved [DO]MO MIN report only Jun, Aug
W010pHMO MIN report only Jun, Aug
W010pHMO MAX report only Jun, Aug
W010Alkalinity, total [as CaCO3]MO MAX report only Jun, Aug
W010Solids, total suspendedMO MAX report only Jun, Aug
W010Nitrite + Nitrate total [as N]MO MAX report only Jun, Aug
W010Phosphorus, total [as P]MO MAX report only Jun, Aug
W010Hardness, total [as CaCO3]MO MAX report only Jun, Aug
W010Calcium, total [as Ca]MO MAX report only Jun, Aug
W010Magnesium, total [as Mg]MO MAX report only Jun, Aug
W010Sodium, total [as Na]MO MAX report only Jun, Aug
W010Chloride [as Cl]MO MAX report only Jun, Aug
W010Sulfate, total [as SO4]MO MAX report only Jun, Aug
W010Fluoride, total [as F]MO MAX report only Jun, Aug
W010Iron, total [as Fe]MO MAX report only Jun, Aug
W010Manganese, total [as Mn]MO MAX report only Jun, Aug
W010Chlorophyll AMO MAX report only Jun, Aug
W010Solids, total dissolvedMO MAX report only Jun, Aug
W010Phosphorous, in total orthophosphateMO MAX report only Jun, Aug
W011Temperature, water deg. centigradeMO MAX report only Jun, Aug
W011Redox [oxidation reduction potential]MO MIN report only Jun, Aug
W011Redox [oxidation reduction potential]MO MAX report only Jun, Aug
W011Specific conductanceMO MAX report only Jun, Aug
W011Oxygen, dissolved [DO]MO MIN report only Jun, Aug
W011pHMO MIN report only Jun, Aug
W011pHMO MAX report only Jun, Aug
W011Alkalinity, total [as CaCO3]MO MAX report only Jun, Aug
W011Solids, total suspendedMO MAX report only Jun, Aug
W011Nitrite + Nitrate total [as N]MO MAX report only Jun, Aug
W011Phosphorus, total [as P]MO MAX report only Jun, Aug
W011Hardness, total [as CaCO3]MO MAX report only Jun, Aug
W011Calcium, total [as Ca]MO MAX report only Jun, Aug
W011Magnesium, total [as Mg]MO MAX report only Jun, Aug
W011Sodium, total [as Na]MO MAX report only Jun, Aug
W011Chloride [as Cl]MO MAX report only Jun, Aug
W011Sulfate, total [as SO4]MO MAX report only Jun, Aug
W011Fluoride, total [as F]MO MAX report only Jun, Aug
W011Iron, total [as Fe]MO MAX report only Jun, Aug
W011Manganese, total [as Mn]MO MAX report only Jun, Aug
W011Chlorophyll AMO MAX report only Jun, Aug
W011Solids, total dissolvedMO MAX report only Jun, Aug
W011Phosphorous, in total orthophosphateMO MAX report only Jun, Aug
W012Temperature, water deg. centigradeMO MAX report only Jun, Aug
W012Redox [oxidation reduction potential]MO MIN report only Jun, Aug
W012Redox [oxidation reduction potential]MO MAX report only Jun, Aug
W012Specific conductanceMO MAX report only Jun, Aug
W012Oxygen, dissolved [DO]MO MIN report only Jun, Aug
W012pHMO MIN report only Jun, Aug
W012pHMO MAX report only Jun, Aug
W012Alkalinity, total [as CaCO3]MO MAX report only Jun, Aug
W012Solids, total suspendedMO MAX report only Jun, Aug
W012Nitrite + Nitrate total [as N]MO MAX report only Jun, Aug
W012Phosphorus, total [as P]MO MAX report only Jun, Aug
W012Hardness, total [as CaCO3]MO MAX report only Jun, Aug
W012Calcium, total [as Ca]MO MAX report only Jun, Aug
W012Magnesium, total [as Mg]MO MAX report only Jun, Aug
W012Sodium, total [as Na]MO MAX report only Jun, Aug
W012Chloride [as Cl]MO MAX report only Jun, Aug
W012Sulfate, total [as SO4]MO MAX report only May, Jun, Aug, Sep
W012Fluoride, total [as F]MO MAX report only Jun, Aug
W012Iron, total [as Fe]MO MAX report only Jun, Aug
W012Manganese, total [as Mn]MO MAX report only Jun, Aug
W012Chlorophyll AMO MAX report only Jun, Aug
W012Solids, total dissolvedMO MAX report only Jun, Aug
W012Phosphorous, in total orthophosphateMO MAX report only Jun, Aug
W013Temperature, water deg. centigradeMO MAX report only Jun, Aug
W013Redox [oxidation reduction potential]MO MIN report only Jun, Aug
W013Redox [oxidation reduction potential]MO MAX report only Jun, Aug
W013Specific conductanceMO MAX report only Jun, Aug
W013Oxygen, dissolved [DO]MO MIN report only Jun, Aug
W013pHMO MIN report only Jun, Aug
W013pHMO MAX report only Jun, Aug
W013Alkalinity, total [as CaCO3]MO MAX report only Jun, Aug
W013Solids, total suspendedMO MAX report only Jun, Aug
W013Nitrite + Nitrate total [as N]MO MAX report only Jun, Aug
W013Phosphorus, total [as P]MO MAX report only Jun, Aug
W013Hardness, total [as CaCO3]MO MAX report only Jun, Aug
W013Calcium, total [as Ca]MO MAX report only Jun, Aug
W013Magnesium, total [as Mg]MO MAX report only Jun, Aug
W013Sodium, total [as Na]MO MAX report only Jun, Aug
W013Chloride [as Cl]MO MAX report only Jun, Aug
W013Sulfate, total [as SO4]MO MAX report only May, Jun, Aug, Sep
W013Fluoride, total [as F]MO MAX report only Jun, Aug
W013Iron, total [as Fe]MO MAX report only Jun, Aug
W013Manganese, total [as Mn]MO MAX report only Jun, Aug
W013Chlorophyll AMO MAX report only Jun, Aug
W013Solids, total dissolvedMO MAX report only Jun, Aug
W013Phosphorous, in total orthophosphateMO MAX report only Jun, Aug
W014Temperature, water deg. centigradeMO MAX report only Jun, Aug
W014Redox [oxidation reduction potential]MO MIN report only Jun, Aug
W014Redox [oxidation reduction potential]MO MAX report only Jun, Aug
W014Specific conductanceMO MAX report only Jun, Aug
W014Oxygen, dissolved [DO]MO MIN report only Jun, Aug
W014pHMO MIN report only Jun, Aug
W014pHMO MAX report only Jun, Aug
W014Alkalinity, total [as CaCO3]MO MAX report only Jun, Aug
W014Solids, total suspendedMO MAX report only Jun, Aug
W014Nitrite + Nitrate total [as N]MO MAX report only Jun, Aug
W014Phosphorus, total [as P]MO MAX report only Jun, Aug
W014Hardness, total [as CaCO3]MO MAX report only Jun, Aug
W014Calcium, total [as Ca]MO MAX report only Jun, Aug
W014Magnesium, total [as Mg]MO MAX report only Jun, Aug
W014Sodium, total [as Na]MO MAX report only Jun, Aug
W014Chloride [as Cl]MO MAX report only Jun, Aug
W014Sulfate, total [as SO4]MO MAX report only Jun, Aug
W014Fluoride, total [as F]MO MAX report only Jun, Aug
W014Iron, total [as Fe]MO MAX report only Jun, Aug
W014Manganese, total [as Mn]MO MAX report only Jun, Aug
W014Chlorophyll AMO MAX report only Jun, Aug
W014Solids, total dissolvedMO MAX report only Jun, Aug
W014Phosphorous, in total orthophosphateMO MAX report only Jun, Aug

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states