US Steel Corp - Tailings

NPDES permit MN0055948 · Minor NON-POTW · administratively continued, expires 2016-10-31 · 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 2016-10-31 and is administratively continued: 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
0required values missing, on 0 form(s)
0of 40 forms filed late

Last period with anything received: 2026-06-30.

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 (48)

OutfallParameterStatisticLimitMonths
010Specific conductanceMO AVG report only all year
010pHINST MIN >= 6 SU all year
010pHINST MAX <= 9 SU all year
010Solids, total suspendedMO AVG <= 20 mg/L all year
010Solids, total suspendedDAILY MX <= 30 mg/L all year
010Sulfate, total [as SO4]MO AVG report only all year
010Sulfate, total [as SO4]MO MAX report only all year
010Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
010Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantMO MAX report only all year
010Flow, in conduit or thru treatment plantMO TOTAL report only all year
010Mercury, total [as Hg]SINGSAMP report only all year
015Specific conductanceMO AVG report only all year
015pHINST MIN >= 6 SU all year
015pHINST MAX <= 9 SU all year
015Solids, total suspendedMO AVG <= 20 mg/L all year
015Solids, total suspendedDAILY MX <= 30 mg/L all year
015Sulfate, total [as SO4]MO AVG report only all year
015Sulfate, total [as SO4]MO MAX report only all year
015Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
015Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
015Selenium, total [as Se]MO AVG report only all year
015Flow, in conduit or thru treatment plantMO AVG report only all year
015Flow, in conduit or thru treatment plantMO MAX report only all year
015Flow, in conduit or thru treatment plantMO TOTAL report only all year
015Mercury, total [as Hg]SINGSAMP report only Mar, Jun, Sep, Dec
018Precipitation, total defined period/inMO TOTAL report only all year
018Evaporation, AccumulatedMO TOTAL report only all year
018Flow, in conduit or thru treatment plantMO TOTAL report only all year
019Specific conductanceMO AVG report only all year
019pHINST MIN >= 6 SU all year
019pHINST MAX <= 9 SU all year
019Solids, total suspendedMO AVG <= 20 mg/L all year
019Solids, total suspendedDAILY MX <= 30 mg/L all year
019Nitrogen, ammonia total [as N]SINGSAMP report only Dec
019Nitrogen, Kjeldahl, total [as N]SINGSAMP report only Dec
019Nitrite + Nitrate total [as N]SINGSAMP report only Dec
019Chloride [as Cl]MO MAX report only all year
019Sulfate, total [as SO4]MO AVG report only all year
019Sulfate, total [as SO4]MO MAX report only all year
019Iron, dissolved [as Fe]MO AVG <= 1 mg/L all year
019Iron, dissolved [as Fe]DAILY MX <= 2 mg/L all year
019Selenium, total [as Se]MO AVG report only all year
019Flow, in conduit or thru treatment plantMO AVG report only all year
019Flow, in conduit or thru treatment plantMO TOTAL report only all year
019Solids, total dissolvedSINGSAMP report only Dec
019Mercury, total [as Hg]SINGSAMP report only Mar, Jun, Sep, Dec

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