Spring Grove city of

NPDES permit MN0021440 · Minor POTW · effective, expires 2029-06-30 · 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

21values over a limit
0required values missing, on 0 form(s)
1of 27 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (8), Solids, suspended percent removal (5), BOD, carbonaceous [5 day, 20 C] (4).

Reporting

Reports are due about 46 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (43)

OutfallParameterStatisticLimitMonths
D011Oxygen, dissolved [DO]MO MIN report only all year
D011pHMO MIN >= 6 SU all year
D011pHMO MAX <= 9 SU all year
D011Solids, total suspendedMO AVG <= 30 mg/L all year
D011Solids, total suspendedMO MAX report only Jul
D011Solids, total suspendedMX WK AV <= 45 mg/L all year
D011Solids, total suspendedMO AVG <= 42.9 kg/d all year
D011Solids, total suspendedMX WK AV <= 64.3 kg/d all year
D011Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D011Nitrogen, ammonia total [as N]MO AVG report only Mar, Sep
D011Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D011Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D011Phosphorus, total [as P]MO AVG report only all year
D011Phosphorus, total [as P]MO AVG report only all year
D011Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D011Flow, in conduit or thru treatment plantMO AVG report only all year
D011Flow, in conduit or thru treatment plantMO MAX report only all year
D011Flow, in conduit or thru treatment plantMO TOTAL report only all year
D011Chlorine, total residualDAILY MX report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D011Solids, total dissolvedMO AVG report only Mar, Sep
D011Mercury, dissolved [as Hg]MO MAX report only Jul
D011Mercury, total [as Hg]MO MAX report only Jul
D011BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D011BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D011BOD, carbonaceous [5 day, 20 C]MO AVG <= 35.7 kg/d all year
D011BOD, carbonaceous [5 day, 20 C]MX WK AV <= 57.2 kg/d all year
D011BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D011Solids, suspended percent removalMO AV MN >= 85 % all year
D012TrichloroethyleneDAILY MX report only all year
S013Precipitation, total defined period/inMO TOTAL report only all year
S013pHMO MIN report only all year
S013pHMO MAX report only all year
S013Solids, total suspendedMO AVG report only all year
S013Solids, total suspendedMO MAX report only all year
S013Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S013Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S013Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S013Phosphorus, total [as P]MO AVG report only all year
S013Flow, in conduit or thru treatment plantMO AVG report only all year
S013Flow, in conduit or thru treatment plantMO MAX report only all year
S013Flow, in conduit or thru treatment plantMO TOTAL report only all year
S013BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S013BOD, 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