Windom city of

NPDES permit MN0022217 · Major POTW · effective, expires 2029-03-31 · 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 24 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 (63)

OutfallParameterStatisticLimitMonths
D029Specific conductanceMO MAX report only all year
D029Oxygen, dissolved [DO]MO MIN >= 6 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
D029Oxygen, dissolved [DO]MO MIN >= 10 mg/L Jan, Feb, Mar, Dec
D029pHMO MIN >= 6 SU all year
D029pHMO MAX <= 9 SU all year
D029Bicarbonate ion- [as HCO3]MO MAX report only all year
D029Solids, total suspendedMO AVG <= 30 mg/L all year
D029Solids, total suspendedMO MAX report only May, Sep
D029Solids, total suspendedMX WK AV <= 45 mg/L all year
D029Solids, total suspendedMO AVG <= 208 kg/d all year
D029Solids, total suspendedMX WK AV <= 311 kg/d all year
D029Nitrogen, total [as N]MO AVG <= 18 mg/L all year
D029Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D029Nitrogen, ammonia total [as N]MO AVG <= 3.1 mg/L Oct, Nov
D029Nitrogen, ammonia total [as N]MO AVG <= 4.1 mg/L Apr, May
D029Nitrogen, ammonia total [as N]MO AVG <= 8 mg/L Jan, Feb, Mar, Dec
D029Nitrogen, ammonia total [as N]MO AVG <= 7 kg/d Jun, Jul, Aug, Sep
D029Nitrogen, ammonia total [as N]MO AVG <= 23 kg/d Oct, Nov
D029Nitrogen, ammonia total [as N]MO AVG <= 50 kg/d Apr, May
D029Nitrogen, ammonia total [as N]MO AVG <= 57 kg/d Jan, Feb, Mar, Dec
D029Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D029Nitrite + Nitrate total [as N]MO AVG report only all year
D029Phosphorus, total [as P]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D029Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D029Phosphorus, total [as P]MO AVG report only Jun, Jul, Aug, Sep
D029Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D029Hardness, total [as CaCO3]MO MAX report only all year
D029Calcium, total [as Ca]MO MAX report only all year
D029Magnesium, total [as Mg]MO MAX report only all year
D029Sodium, total [as Na]MO MAX report only all year
D029Potassium, total [as K]MO MAX report only all year
D029Chloride [as Cl]DAILY MX <= 608 mg/L all year
D029Sulfate, total [as SO4]MO MAX report only all year
D029Copper, total [as Cu]MO AVG <= 21 ug/L Mar, Jun, Sep, Dec
D029Copper, total [as Cu]DAILY MX <= 40 ug/L Mar, Jun, Sep, Dec
D029Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D029Flow, in conduit or thru treatment plantMO AVG report only all year
D029Flow, in conduit or thru treatment plantMO MAX report only all year
D029Flow, in conduit or thru treatment plantMO TOTAL report only all year
D029Chlorine, total residualDAILY MX <= .038 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
D029Solids, total dissolvedMO MAX report only all year
D029Mercury, dissolved [as Hg]MO MAX report only May, Sep
D029Mercury, total [as Hg]MO MAX report only May, Sep
D029BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L all year
D029BOD, carbonaceous [5 day, 20 C]MX WK AV <= 25 mg/L all year
D029BOD, carbonaceous [5 day, 20 C]MO AVG <= 104 kg/d all year
D029BOD, carbonaceous [5 day, 20 C]MX WK AV <= 173 kg/d all year
D029BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D029Solids, suspended percent removalMO AV MN >= 85 % all year
S030Precipitation, total defined period/inMO TOTAL report only all year
S030pHMO MIN report only all year
S030pHMO MAX report only all year
S030Solids, total suspendedMO AVG report only all year
S030Solids, total suspendedMO MAX report only all year
S030Nitrogen, total [as N]MO AVG report only all year
S030Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S030Nitrite + Nitrate total [as N]MO AVG report only all year
S030Phosphorus, total [as P]MO AVG report only all year
S030Flow, in conduit or thru treatment plantMO AVG report only all year
S030Flow, in conduit or thru treatment plantMO MAX report only all year
S030Flow, in conduit or thru treatment plantMO TOTAL report only all year
S030BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S030BOD, 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