Grand Marais city of

NPDES permit MN0020010 · Minor POTW · effective, expires 2029-10-31 · 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.

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

5values over a limit
0required values missing, on 0 form(s)
0of 40 forms filed late

Last period with anything received: 2026-08-31. Most often over: pH (2), Coliform, fecal MPN + membrane ftl 44.5 C (1), Solids, suspended percent removal (1).

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 (50)

OutfallParameterStatisticLimitMonths
D010Oxygen, dissolved [DO]MO MIN report only all year
D010pHMO MIN >= 6 SU all year
D010pHMO MAX <= 9 SU all year
D010Solids, total suspendedMO AVG report only May, Sep
D010Solids, total suspendedMO AVG <= 30 mg/L all year
D010Solids, total suspendedDAILY MX report only May, Sep
D010Solids, total suspendedMX WK AV <= 45 mg/L all year
D010Solids, total suspendedMO AVG <= 112.3 kg/d all year
D010Solids, total suspendedYA <= 17144 kg/yr all year
D010Solids, total suspendedMX WK AV <= 168.4 kg/d all year
D010Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D010Nitrogen, ammonia total [as N]MO AVG report only Mar, Sep
D010Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D010Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D010Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D010Phosphorus, total [as P]MO AVG report only all year
D010Phosphorus, total [as P]ANNL TOT <= 522 kg/yr all year
D010Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL all year
D010Flow, in conduit or thru treatment plantMO AVG report only all year
D010Flow, in conduit or thru treatment plantMO MAX report only all year
D010Flow, in conduit or thru treatment plantMO TOTAL report only all year
D010Solids, total dissolvedMO AVG report only Mar, Sep
D010Mercury, dissolved [as Hg]MO AVG report only May, Sep
D010Mercury, dissolved [as Hg]DAILY MX report only May, Sep
D010Mercury, total [as Hg]MO AVG report only May, Sep
D010Mercury, total [as Hg]DAILY MX <= 6.1 ng/L May, Sep
D010BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D010BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D010BOD, carbonaceous [5 day, 20 C]MO AVG <= 93.6 kg/d all year
D010BOD, carbonaceous [5 day, 20 C]YA <= 14168 kg/yr all year
D010BOD, carbonaceous [5 day, 20 C]MX WK AV <= 149.7 kg/d all year
D010BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D010Solids, suspended percent removalMO AV MN >= 85 % all year
S011Precipitation, total defined period/inMO TOTAL report only all year
S011pHMO MIN report only all year
S011pHMO MAX report only all year
S011Solids, total suspendedMO AVG report only May, Sep
S011Solids, total suspendedMO AVG report only all year
S011Solids, total suspendedMO MAX report only all year
S011Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S011Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S011Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S011Phosphorus, total [as P]MO AVG report only all year
S011Flow, in conduit or thru treatment plantMO AVG report only all year
S011Flow, in conduit or thru treatment plantMO MAX report only all year
S011Flow, in conduit or thru treatment plantMO TOTAL report only all year
S011Mercury, dissolved [as Hg]MO AVG report only May, Sep
S011Mercury, total [as Hg]MO AVG report only May, Sep
S011BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S011BOD, carbonaceous [5 day, 20 C]MO MAX 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