Granite Falls city of

NPDES permit MN0021211 · Minor POTW · effective, expires 2027-12-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 37 forms filed late

Last period with anything received: 2026-08-31.

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 (45)

OutfallParameterStatisticLimitMonths
D032Oxygen, dissolved [DO]MO MIN report only all year
D032pHMO MIN >= 6 SU all year
D032pHMO MAX <= 9 SU all year
D032Solids, total suspendedMO AVG <= 30 mg/L all year
D032Solids, total suspendedMO MAX report only Jul
D032Solids, total suspendedMX WK AV <= 45 mg/L all year
D032Solids, total suspendedMO AVG <= 91 kg/d all year
D032Solids, total suspendedMX WK AV <= 136 kg/d all year
D032Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D032Nitrogen, ammonia total [as N]MO AVG report only Mar, Sep
D032Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D032Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D032Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D032Phosphorus, total [as P]MO AVG report only Jun, Jul, Aug, Sep
D032Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D032Phosphorus, total [as P]MO AVG <= 4 kg/d Jun, Jul, Aug, Sep
D032Phosphorus, total [as P]ANNL TOT <= 1105 kg/yr all year
D032Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D032Flow, in conduit or thru treatment plantMO AVG report only all year
D032Flow, in conduit or thru treatment plantMO MAX report only all year
D032Flow, in conduit or thru treatment plantMO TOTAL report only all year
D032Chlorine, total residualDAILY MX <= .038 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
D032Solids, total dissolvedMO AVG report only Mar, Sep
D032Mercury, dissolved [as Hg]MO MAX report only Jul
D032Mercury, total [as Hg]MO MAX report only Jul
D032BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D032BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D032BOD, carbonaceous [5 day, 20 C]MO AVG <= 76 kg/d all year
D032BOD, carbonaceous [5 day, 20 C]MX WK AV <= 121 kg/d all year
D032BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D032Solids, suspended percent removalMO AV MN >= 85 % all year
S036Precipitation, total defined period/inMO TOTAL report only all year
S036pHMO MIN report only all year
S036pHMO MAX report only all year
S036Solids, total suspendedMO AVG report only all year
S036Solids, total suspendedMO MAX report only all year
S036Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S036Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S036Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S036Phosphorus, total [as P]MO AVG report only all year
S036Flow, in conduit or thru treatment plantMO AVG report only all year
S036Flow, in conduit or thru treatment plantMO MAX report only all year
S036Flow, in conduit or thru treatment plantMO TOTAL report only all year
S036BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S036BOD, 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