Butterfield city of

NPDES permit MN0022977 · Minor POTW · administratively continued, expires 2024-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2024-03-31 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

0values over a limit
31required values missing, on 2 form(s)
0of 52 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 (59)

OutfallParameterStatisticLimitMonths
D009Temperature, water deg. centigradeMO MAX report only all year
D009Specific conductanceMO MAX report only all year
D009Oxygen, dissolved [DO]MO MIN report only all year
D009pHMO MIN >= 6 SU all year
D009pHMO MAX <= 9 SU all year
D009Bicarbonate ion- [as HCO3]MO MAX report only all year
D009Solids, total suspendedMO AVG <= 45 mg/L all year
D009Solids, total suspendedANNL MAX report only all year
D009Solids, total suspendedMX WK AV <= 65 mg/L all year
D009Solids, total suspendedMO AVG <= 471.1 kg/d all year
D009Solids, total suspendedMX WK AV <= 681 kg/d all year
D009Nitrogen, total [as N]MO AVG report only all year
D009Nitrogen, ammonia total [as N]MO AVG report only all year
D009Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D009Nitrite + Nitrate total [as N]MO AVG report only all year
D009Phosphorus, total [as P]MO AVG report only all year
D009Phosphorus, total [as P]MO AVG report only all year
D009Phosphorus, total [as P]YA <= 372 kg/yr all year
D009Calcium, total [as Ca]MO MAX report only all year
D009Magnesium, total [as Mg]MO MAX report only all year
D009Sodium, total [as Na]MO MAX report only all year
D009Potassium, total [as K]MO MAX report only all year
D009Chloride [as Cl]MO MAX report only all year
D009Sulfate, total [as SO4]MO MAX report only all year
D009Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D009Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D009Flow, in conduit or thru treatment plantMO AVG report only Jan, Feb, Jul, Aug
D009Flow, in conduit or thru treatment plantMO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D009Flow, in conduit or thru treatment plantMO MAX report only Jan, Feb, Jul, Aug
D009Flow, in conduit or thru treatment plantMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D009Flow, in conduit or thru treatment plantMO TOTAL report only Jan, Feb, Jul, Aug
D009Flow, in conduit or thru treatment plantMO TOTAL report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
D009Solids, total dissolvedMO MAX report only all year
D009Mercury, dissolved [as Hg]ANNL MAX report only all year
D009Mercury, total [as Hg]ANNL MAX report only all year
D009BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D009BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D009BOD, carbonaceous [5 day, 20 C]MO AVG <= 261.7 kg/d all year
D009BOD, carbonaceous [5 day, 20 C]MX WK AV <= 419 kg/d all year
S011Precipitation, total defined period/inMO TOTAL report only all year
S011pHQB report only Mar, Jun, Sep, Dec
S011Solids, total suspendedQRTR AVG report only Mar, Jun, Sep, Dec
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]QRTR AVG report only Mar, Jun, Sep, Dec
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
S011BOD, carbonaceous [5 day, 20 C]QRTR AVG report only Mar, Jun, Sep, Dec
W013Temperature, water deg. centigradeMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W013Stream flow, instantaneousINST MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W013pHMO MIN report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W013pHMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W013Nitrogen, ammonia total [as N]MO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W015Temperature, water deg. centigradeMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W015pHMO MIN report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W015pHMO MAX report only Mar, Apr, May, Jun, Sep, Oct, Nov, Dec
W015Nitrogen, ammonia total [as N]MO AVG report only Mar, Apr, May, Jun, Sep, Oct, Nov, 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