US Steel Corp

NPDES permit MN0057207 · Major NON-POTW · expired, expires 2023-11-30 · 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.

This permit expired on 2023-11-30 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
1required values missing, on 1 form(s)
0of 92 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 (86)

OutfallParameterStatisticLimitMonths
D012Temperature, water deg. centigradeMO MAX report only all year
D012Specific conductanceMO AVG report only all year
D012pHINST MIN >= 6 SU all year
D012pHINST MAX <= 9 SU all year
D012Bicarbonate ion- [as HCO3]MO AVG report only all year
D012Solids, total suspendedMO AVG <= 20 mg/L all year
D012Solids, total suspendedQB report only Mar, Jun, Sep, Dec
D012Solids, total suspendedDAILY MX <= 30 mg/L all year
D012Solids, total suspendedMO AVG <= 36.4 kg/d all year
D012Chloride [as Cl]MO AVG report only all year
D012Sulfate, total [as SO4]MO AVG report only all year
D012Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
D012Iron, dissolved [as Fe]MO MAX <= 2 mg/L all year
D012Manganese, dissolved [as Mn]MO AVG report only all year
D012Hardness, Ca Mg Calculated [mg/L as CaCO3]MO AVG report only all year
D012Flow, in conduit or thru treatment plantMO AVG report only all year
D012Flow, in conduit or thru treatment plantDAILY MX report only all year
D012Flow, in conduit or thru treatment plantMO TOTAL report only all year
D012Solids, total dissolvedMO AVG report only all year
D012Mercury, dissolved [as Hg]QB report only Mar, Jun, Sep, Dec
D012Mercury, total [as Hg]QB report only Mar, Jun, Sep, Dec
W016Temperature, water deg. centigradeMO MAX report only all year
W016Stream flow, instantaneousDAILY MX report only all year
W016Specific conductanceMO MAX report only all year
W016pHMO MIN report only all year
W016pHMO MAX report only all year
W016Bicarbonate ion- [as HCO3]MO MAX report only all year
W016Chloride [as Cl]MO MAX report only all year
W016Sulfate, total [as SO4]MO MAX report only all year
W016Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W016Solids, total dissolvedMO MAX report only all year
W025Temperature, water deg. centigradeMO MAX report only all year
W025Specific conductanceMO MAX report only all year
W025pHMO MIN report only all year
W025pHMO MAX report only all year
W025Bicarbonate ion- [as HCO3]MO MAX report only all year
W025Chloride [as Cl]MO MAX report only all year
W025Sulfate, total [as SO4]MO MAX report only all year
W025Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W025Solids, total dissolvedMO MAX report only all year
W026Temperature, water deg. centigradeMO MAX report only all year
W026Specific conductanceMO MAX report only all year
W026pHMO MIN report only all year
W026pHMO MAX report only all year
W026Bicarbonate ion- [as HCO3]MO MAX report only all year
W026Chloride [as Cl]MO MAX report only all year
W026Sulfate, total [as SO4]MO MAX report only all year
W026Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W026Solids, total dissolvedMO MAX report only all year
W027Temperature, water deg. centigradeMO MAX report only all year
W027Specific conductanceMO MAX report only all year
W027pHMO MIN report only all year
W027pHMO MAX report only all year
W027Bicarbonate ion- [as HCO3]MO MAX report only all year
W027Chloride [as Cl]MO MAX report only all year
W027Sulfate, total [as SO4]MO MAX report only all year
W027Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W027Solids, total dissolvedMO MAX report only all year
W028Temperature, water deg. centigradeMO MAX report only all year
W028Specific conductanceMO MAX report only all year
W028pHMO MIN report only all year
W028pHMO MAX report only all year
W028Bicarbonate ion- [as HCO3]MO MAX report only all year
W028Chloride [as Cl]MO MAX report only all year
W028Sulfate, total [as SO4]MO MAX report only all year
W028Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W028Solids, total dissolvedMO MAX report only all year
W030Temperature, water deg. centigradeMO MAX report only all year
W030Specific conductanceMO MAX report only all year
W030pHMO MIN report only all year
W030pHMO MAX report only all year
W030Bicarbonate ion- [as HCO3]MO MAX report only all year
W030Chloride [as Cl]MO MAX report only all year
W030Sulfate, total [as SO4]MO MAX report only all year
W030Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W030Solids, total dissolvedMO MAX report only all year
W032Temperature, water deg. centigradeMO MAX report only all year
W032Stream flow, instantaneousDAILY MX report only all year
W032Specific conductanceMO MAX report only all year
W032pHMO MIN report only all year
W032pHMO MAX report only all year
W032Bicarbonate ion- [as HCO3]MO MAX report only all year
W032Chloride [as Cl]MO MAX report only all year
W032Sulfate, total [as SO4]MO MAX report only all year
W032Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W032Solids, total dissolvedMO MAX report only all year

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