MAHNOMEN

NPDES permit MN0024066 · Minor POTW · effective, expires 2029-09-25 · 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
13required values missing, on 3 form(s)
3of 33 forms filed late

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

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (87)

OutfallParameterStatisticLimitMonths
001pHMINIMUM report only Mar, Jun, Sep, Dec
001pHMAXIMUM report only Mar, Jun, Sep, Dec
001Solids, total suspendedMO AVG report only Mar, Jun, Sep, Dec
001Nitrogen, total [as N]MO AVG report only Mar, Jun, Sep, Dec
001Nitrogen, ammonia total [as N]MO AVG report only Mar, Jun, Sep, Dec
001Nitrogen, Kjeldahl, total [as N]MO AVG report only Mar, Jun, Sep, Dec
001Nitrite + Nitrate total [as N]MO AVG report only Mar, Jun, Sep, Dec
001Phosphorus, total [as P]MO AVG report only Mar, Jun, Sep, Dec
001RainfallMO TOTAL report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Mercury, total [as Hg]MO AVG report only Jun, Dec
001Mercury, total [as Hg]DAILY MX report only Jun, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG report only Mar, Jun, Sep, Dec
002Oxygen, dissolved [DO]DAILY MN report only all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 45 mg/L all year
002Solids, total suspendedWKLY AVG <= 65 mg/L all year
002Solids, total suspendedMO AVG <= 177 kg/d all year
002Solids, total suspendedWKLY AVG <= 256 kg/d all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil and grease [soxhlet extr.] tot.MO AVG report only Jun, Dec
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]MO AVG report only Jun, Dec
002Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
002Nitrite + Nitrate total [as N]MO AVG report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]12 <= 934 kg/yr all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantMO TOTAL report only all year
002E. coliMO AVG <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002E. coliDAILY MX <= 235 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002Solids, total dissolvedMO AVG report only Jun, Dec
002Mercury, dissolved [as Hg]MO AVG report only Mar, Jun, Sep, Dec
002Mercury, dissolved [as Hg]DAILY MX report only Mar, Jun, Sep, Dec
002Mercury, total [as Hg]MO AVG <= 10.4 ng/L all year
002Mercury, total [as Hg]DAILY MX <= 20.2 ng/L all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
002BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 98 kg/d all year
002BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 157 kg/d all year
002BOD, carb-5 day, 20 deg C, percent removalMN % RMV >= 85 % all year
002Solids, suspended percent removalMN % RMV >= 65 % all year
002Outfall observation,visual, y/n responseMO AVG report only all year
003Oxygen, dissolved [DO]DAILY MN report only all year
003pHDAILY MN >= 6 SU all year
003pHDAILY MX <= 9 SU all year
003Solids, total suspendedMO AVG <= 45 mg/L all year
003Solids, total suspendedWKLY AVG <= 65 mg/L all year
003Solids, total suspendedMO AVG <= 528 kg/d all year
003Solids, total suspendedWKLY AVG <= 763 kg/d all year
003Solids, total suspendedMO AVG report only Mar, Jun, Sep, Dec
003Solids, total suspendedDAILY MX report only Mar, Jun, Sep, Dec
003Oil and grease [soxhlet extr.] tot.MO AVG report only Jun, Dec
003Nitrogen, total [as N]MO AVG report only all year
003Nitrogen, ammonia total [as N]MO AVG report only Jun, Dec
003Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
003Nitrite + Nitrate total [as N]MO AVG report only all year
003Phosphorus, total [as P]MO AVG report only all year
003Phosphorus, total [as P]MO AVG report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Flow, in conduit or thru treatment plantMO TOTAL report only all year
003E. coliMO AVG <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
003E. coliDAILY MX <= 235 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
003Solids, total dissolved [TDS]MO AVG report only Jun, Dec
003Mercury, dissolved [as Hg]MO AVG report only Jun, Dec
003Mercury, dissolved [as Hg]DAILY MX report only Jun, Dec
003Mercury, dissolved [as Hg]MO AVG report only Jun, Dec
003Mercury, dissolved [as Hg]DAILY MX report only Jun, Dec
003Mercury, total [as Hg]MO AVG <= 10.4 ng/L all year
003Mercury, total [as Hg]DAILY MX <= 20.2 ng/L all year
003Mercury, total [as Hg]MO AVG report only Jun, Dec
003Mercury, total [as Hg]DAILY MX report only Jun, Dec
003BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
003BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L all year
003BOD, carbonaceous [5 day, 20 C]MO AVG <= 293 kg/d all year
003BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 469 kg/d all year
003BOD, carb-5 day, 20 deg C, percent removalMN % RMV >= 85 % all year
003Solids, suspended percent removalMN % RMV >= 65 % all year
003Outfall observation,visual, y/n responseMO AVG 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