Minnesota Power

NPDES permit MN0002208 · Major NON-POTW · expired, expires 2023-09-30 · 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 2023-09-30 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
9required values missing, on 9 form(s)
0of 60 forms filed late

Last period with anything received: 2026-08-31.

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 (41)

OutfallParameterStatisticLimitMonths
D009Temperature, water deg. fahrenheitDAILY MX report only all year
D009Temp. diff. between samp. & upstrm deg. FMX DA AV <= 23 deg F all year
D009pHINST MIN >= 6.5 SU all year
D009pHINST MAX <= 8.5 SU all year
D009Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
D009Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
D009Nitrogen, total [as N]ANNL AVG report only all year
D009Nitrogen, Kjeldahl, total [as N]ANNL AVG report only all year
D009Nitrite + Nitrate total [as N]ANNL AVG report only all year
D009Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
D009Flow, in conduit or thru treatment plantMO AVG report only all year
D009Flow, in conduit or thru treatment plantMO TOTAL report only all year
D010Rainfall durationMO TOTAL report only all year
D010Precipitation, total defined period/inMO TOTAL report only all year
D010pHINST MIN >= 6 SU all year
D010pHINST MAX <= 9 SU all year
D010Bicarbonate ion- [as HCO3]MO AVG report only all year
D010Solids, total suspendedMO AVG <= 30 mg/L all year
D010Solids, total suspendedDAILY MX report only all year
D010Solids, total suspendedDAILY MX <= 50 mg/L all year
D010Oil and grease, hexane extr methodMO AVG <= 10 mg/L all year
D010Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
D010Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
D010Magnesium, total [as Mg]MO AVG report only all year
D010Potassium, dissolved [as K]MO AVG report only all year
D010Chloride [as Cl]MO AVG report only all year
D010Sulfate, dissolved [as SO4]MO AVG report only all year
D010Flow, in conduit or thru treatment plantDAILY MX <= .72 MGD all year
D010Flow, in conduit or thru treatment plantMO TOTAL report only all year
D010Mercury, dissolved [as Hg]DAILY MX report only all year
D010Mercury, total [as Hg]MO AVG report only all year
D010Mercury, total [as Hg]DAILY MX report only all year
D010Mercury, total [as Hg]MO AVG report only all year
D010Mercury, total [as Hg]DAILY MX report only all year
D010Depth of pond or reservoir in feetMO TOTAL report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D010Effluent dilution ratioDAILY MN >= 10 Ratio all year
D010Duration of dischargeMO TOTAL <= 192 hr/mo all year
W020Temperature, water deg. fahrenheitMX DA AV report only all year
W020Temperature, water deg. fahrenheitDAILY MX report only all year
W021Temperature, water deg. fahrenheitMX DA AV report only all year
W021Temperature, water deg. fahrenheitDAILY MX 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