Cromwell city of

NPDES permit MN0051101 · Minor POTW · administratively continued, expires 2026-02-28 · 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 2026-02-28 and is administratively continued: 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

1values over a limit
0required values missing, on 0 form(s)
0of 33 forms filed late

Last period with anything received: 2026-07-31. Most often over: pH (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 (36)

OutfallParameterStatisticLimitMonths
D007Oxygen, dissolved [DO]MO MIN report only all year
D007pHMO MIN >= 6 SU all year
D007pHMO MAX <= 9 SU all year
D007Solids, total suspendedMO AVG <= 45 mg/L all year
D007Solids, total suspendedMX WK AV <= 65 mg/L all year
D007Solids, total suspendedMO AVG <= 101.3 kg/d all year
D007Solids, total suspendedMX WK AV <= 146.3 kg/d all year
D007Nitrogen, total [as N]MO AVG report only all year
D007Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D007Nitrite + Nitrate total [as N]MO AVG report only all year
D007Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D007Phosphorus, total [as P]MO AVG report only all year
D007Phosphorus, total [as P]YA <= 72 kg/yr all year
D007Sulfate, total [as SO4]MO AVG report only all year
D007Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D007Flow, in conduit or thru treatment plantANNL AVG report only Jan, Feb, Jul, Aug
D007Flow, in conduit or thru treatment plantMO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D007Flow, in conduit or thru treatment plantMO MAX report only Jan, Feb, Jul, Aug
D007Flow, in conduit or thru treatment plantMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D007Flow, in conduit or thru treatment plantMO TOTAL report only Jan, Feb, Jul, Aug
D007Flow, in conduit or thru treatment plantMO TOTAL report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D007BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D007BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D007BOD, carbonaceous [5 day, 20 C]MO AVG <= 56.2 kg/d all year
D007BOD, carbonaceous [5 day, 20 C]MX WK AV <= 90 kg/d all year
S008Precipitation, total defined period/inMO TOTAL report only all year
S008pHQB report only Mar, Jun, Sep, Dec
S008Solids, total suspendedQRTR AVG report only Mar, Jun, Sep, Dec
S008Nitrogen, total [as N]MO AVG report only Mar, Sep
S008Nitrogen, Kjeldahl, total [as N]MO AVG report only Mar, Sep
S008Nitrite + Nitrate total [as N]MO AVG report only Mar, Sep
S008Phosphorus, total [as P]QRTR AVG report only Mar, Jun, Sep, Dec
S008Flow, in conduit or thru treatment plantMO AVG report only all year
S008Flow, in conduit or thru treatment plantMO MAX report only all year
S008Flow, in conduit or thru treatment plantMO TOTAL report only all year
S008BOD, 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