Big Lake city of

NPDES permit MN0041076 · Minor POTW · expired, expires 2023-03-31 · 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.

This permit expired on 2023-03-31 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
0required values missing, on 0 form(s)
0of 34 forms filed late

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

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 (42)

OutfallParameterStatisticLimitMonths
D015Oxygen, dissolved [DO]MO MIN report only all year
D015pHMO MIN >= 6 SU all year
D015pHMO MAX <= 9 SU all year
D015Solids, total suspendedMO AVG <= 30 mg/L all year
D015Solids, total suspendedMO MAX report only Jul
D015Solids, total suspendedMX WK AV <= 45 mg/L all year
D015Solids, total suspendedMO AVG <= 41.2 kg/d all year
D015Solids, total suspendedMX WK AV <= 61.7 kg/d all year
D015Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D015Nitrogen, ammonia total [as N]MO AVG report only Mar, Sep
D015Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D015Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D015Phosphorus, total [as P]MO AVG report only all year
D015Phosphorus, total [as P]MO AVG report only all year
D015Phosphorus, total [as P]ANNL TOT <= 1160 kg/yr all year
D015Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D015Flow, in conduit or thru treatment plantMO AVG report only all year
D015Flow, in conduit or thru treatment plantMO MAX report only all year
D015Flow, in conduit or thru treatment plantMO TOTAL report only all year
D015Solids, total dissolvedMO AVG report only Mar, Sep
D015Mercury, dissolved [as Hg]MO MAX report only Jul
D015Mercury, total [as Hg]MO MAX report only Jul
D015BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D015BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D015BOD, carbonaceous [5 day, 20 C]MO AVG <= 34.3 kg/d all year
D015BOD, carbonaceous [5 day, 20 C]MX WK AV <= 54.9 kg/d all year
D015BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D015Solids, suspended percent removalMO AV MN >= 85 % all year
S016Precipitation, total defined period/inMO TOTAL report only all year
S016pHMO MIN report only all year
S016pHMO MAX report only all year
S016Solids, total suspendedMO AVG report only all year
S016Solids, total suspendedMO MAX report only all year
S016Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S016Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S016Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S016Phosphorus, total [as P]MO AVG report only all year
S016Flow, in conduit or thru treatment plantMO AVG report only all year
S016Flow, in conduit or thru treatment plantMO MAX report only all year
S016Flow, in conduit or thru treatment plantMO TOTAL report only all year
S016BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S016BOD, 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