Biwabik city of

NPDES permit MN0053279 · Minor POTW · effective, expires 2027-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

2values over a limit
3required values missing, on 1 form(s)
0of 48 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (2).

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 (56)

OutfallParameterStatisticLimitMonths
D001Oxygen, dissolved [DO]MO MIN report only all year
D001pHMO MIN >= 6 SU all year
D001pHMO MAX <= 9 SU all year
D001Solids, total suspendedMO AVG report only all year
D001Solids, total suspendedMO AVG <= 45 mg/L all year
D001Solids, total suspendedDAILY MX report only all year
D001Solids, total suspendedMX WK AV <= 65 mg/L all year
D001Solids, total suspendedMO AVG <= 243.8 kg/d all year
D001Solids, total suspendedMX WK AV <= 352.2 kg/d all year
D001Nitrogen, total [as N]MO AVG report only all year
D001Nitrogen, ammonia total [as N]MO AVG report only all year
D001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D001Nitrite + Nitrate total [as N]MO AVG report only all year
D001Phosphorus, total [as P]MO AVG report only all year
D001Phosphorus, total [as P]MO AVG report only all year
D001Sulfate, total [as SO4]MO AVG report only May, Jun, Jul, Aug, Sep, Oct, Nov
D001Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D001Flow, in conduit or thru treatment plantMO AVG report only Jan, Feb, Mar, Apr, Dec
D001Flow, in conduit or thru treatment plantMO AVG report only May, Jun, Jul, Aug, Sep, Oct, Nov
D001Flow, in conduit or thru treatment plantMO MAX report only Jan, Feb, Mar, Apr, Dec
D001Flow, in conduit or thru treatment plantMO MAX report only May, Jun, Jul, Aug, Sep, Oct, Nov
D001Flow, in conduit or thru treatment plantMO TOTAL report only Jan, Feb, Mar, Apr, Dec
D001Flow, in conduit or thru treatment plantMO TOTAL report only May, Jun, Jul, Aug, Sep, Oct, Nov
D001Solids, total dissolvedMO AVG report only all year
D001Mercury, dissolved [as Hg]MO AVG report only all year
D001Mercury, dissolved [as Hg]DAILY MX report only all year
D001Mercury, total [as Hg]MO AVG <= 1.9 ng/L all year
D001Mercury, total [as Hg]DAILY MX <= 3.4 ng/L all year
D001Mercury, total [as Hg]MO AVG <= 10.3 mg/d all year
D001Mercury, total [as Hg]DAILY MX <= 18.4 mg/d all year
D001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D001BOD, carbonaceous [5 day, 20 C]MO AVG <= 135.5 kg/d all year
D001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 216.7 kg/d all year
D002pHMO MIN report only all year
D002pHMO MAX report only all year
D002Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D002Phosphorus, total [as P]MO AVG <= 5.5 kg/d all year
D002Sulfate, total [as SO4]MO AVG report only all year
D002Flow, in conduit or thru treatment plantMO AVG report only all year
D002Flow, in conduit or thru treatment plantMO MAX report only all year
D002Flow, in conduit or thru treatment plantMO TOTAL report only all year
S003Precipitation, total defined period/inMO TOTAL report only all year
S003pHQB report only Mar, Jun, Sep, Dec
S003Solids, total suspendedQRTR AVG report only Mar, Jun, Sep, Dec
S003Solids, total suspendedMO AVG report only all year
S003Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S003Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S003Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S003Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
S003Flow, in conduit or thru treatment plantMO AVG report only all year
S003Flow, in conduit or thru treatment plantMO MAX report only all year
S003Flow, in conduit or thru treatment plantMO TOTAL report only all year
S003Mercury, dissolved [as Hg]MO AVG report only all year
S003Mercury, total [as Hg]MO AVG report only all year
S003BOD, carbonaceous [5 day, 20 C]QRTR AVG 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