Minnkota Power Cooperative Inc

NPDES permit ND0000370 · Major NON-POTW · effective, expires 2030-06-30 · 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.

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

3values over a limit
2required values missing, on 1 form(s)
0of 84 forms filed late

Last period with anything received: 2026-07-31. Most often over: E. coli (3).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (105)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigrade30DA AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Flow, in conduit or thru treatment plant30DA AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .15 mg/L all year
001Chlorine, total residualMAXIMUM <= .2 mg/L all year
001Chlorine, total residualDAILY MX <= 73.7 lb/d all year
003BOD, 5-day, 20 deg. CMO AVG <= 25 mg/L all year
003BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 45 mg/L all year
003Nitrogen, total [as N]DAILY MN report only all year
003Nitrogen, total [as N]MO AVG report only all year
003Nitrogen, total [as N]DAILY MX report only all year
003Nitrogen, total [as N]MO AVG report only all year
003Nitrogen, total [as N]DAILY MX report only all year
003Phosphorus, total [as P]DAILY MN report only all year
003Phosphorus, total [as P]MO AVG report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Phosphorus, total [as P]MO AVG report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Flow, in conduit or thru treatment plant30DA AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualDAILY MX <= 2.5 mg/L all year
003E. coliDAILY MN report only Apr, May, Jun, Jul, Aug, Sep, Oct
003E. coli30DAVGEO <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
003E. coliDAILY MX <= 409 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
008pHMINIMUM >= 6 SU all year
008pHMAXIMUM <= 9 SU all year
008Solids, total suspendedMO AVG <= 30 mg/L all year
008Solids, total suspendedDAILY MX <= 50 mg/L all year
008Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
008Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
008DurationTOTAL report only all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
008Flow, totalTOTAL report only all year
008Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubiaMAXIMUM < 1 tox acute (alert) all year
008TU Static Renewal 96Hr Acute Pimphales promelasMAXIMUM < 1 tox acute (alert) all year
019pHMINIMUM >= 6.5 SU all year
019pHMAXIMUM <= 9 SU all year
019Solids, total suspendedMO AVG report only all year
019Solids, total suspendedDAILY MX report only all year
019Oil and grease, hexane extr methodMO AVG report only all year
019Oil and grease, hexane extr methodDAILY MX report only all year
019DurationTOTAL report only all year
019Flow, in conduit or thru treatment plantMO AVG report only all year
019Flow, in conduit or thru treatment plantDAILY MX report only all year
019Flow, totalTOTAL report only all year
020pHMINIMUM >= 6 SU all year
020pHMAXIMUM <= 9 SU all year
020Solids, total suspendedMO AVG <= 30 mg/L all year
020Solids, total suspendedDAILY MX <= 50 mg/L all year
020Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
020Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
020DurationTOTAL report only all year
020Flow, in conduit or thru treatment plantMO AVG report only all year
020Flow, in conduit or thru treatment plantDAILY MX report only all year
020Flow, totalTOTAL report only all year
025pHMINIMUM >= 6.5 SU all year
025pHMAXIMUM <= 9 SU all year
025Solids, total suspendedMO AVG <= 30 mg/L all year
025Solids, total suspendedDAILY MX <= 100 mg/L all year
025Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
025Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
025Sulfate, total [as SO4]MO AVG report only all year
025Sulfate, total [as SO4]DAILY MX report only all year
025Sulfate, total [as SO4]MO AVG report only all year
025Sulfate, total [as SO4]DAILY MX report only all year
025Sulfate, total [as SO4]MO AVG report only all year
025Sulfate, total [as SO4]DAILY MX report only all year
025Sulfate, total [as SO4]MO AVG report only all year
025Sulfate, total [as SO4]DAILY MX report only all year
025Sulfate, total [as SO4]MO AVG report only all year
025Sulfate, total [as SO4]DAILY MX report only all year
025Arsenic, total [as As]MO AVG report only all year
025Arsenic, total [as As]DAILY MX report only all year
025Boron, total [as B]MO AVG report only all year
025Boron, total [as B]DAILY MX report only all year
025Boron, total [as B]MO AVG report only all year
025Boron, total [as B]DAILY MX report only all year
025Boron, total [as B]MO AVG report only all year
025Boron, total [as B]DAILY MX report only all year
025Boron, total [as B]MO AVG report only all year
025Boron, total [as B]DAILY MX report only all year
025Boron, total [as B]MO AVG report only all year
025Boron, total [as B]DAILY MX report only all year
025Copper, total [as Cu]MO AVG report only all year
025Copper, total [as Cu]DAILY MX report only all year
025DichlorobromomethaneMO AVG report only all year
025DichlorobromomethaneDAILY MX report only all year
025BromoformMO AVG report only all year
025BromoformDAILY MX report only all year
025Flow, in conduit or thru treatment plantMO AVG report only all year
025Flow, in conduit or thru treatment plantDAILY MX report only all year
025Sodium, % total cationsMO AVG report only all year
025Sodium, % total cationsDAILY MX report only all year
025TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMAXIMUM < 5 tox chronic (alert) all year
025TU Static Renewal 7-Day Chronic Pimphales promelasMAXIMUM < 5 tox chronic (alert) all year
CWIFlow, in conduit or thru treatment plantMO AVG report only all year
CWIFlow, in conduit or thru treatment plantDAILY 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