City of Winona

NPDES permit MN0030147 · Major POTW · administratively continued, expires 2026-06-30 · 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.

This permit expired on 2026-06-30 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
0required values missing, on 0 form(s)
0of 35 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 (52)

OutfallParameterStatisticLimitMonths
D065Specific conductanceMO MAX report only all year
D065Oxygen, dissolved [DO]MO MIN report only all year
D065pHMO MIN >= 6 SU all year
D065pHMO MAX <= 9 SU all year
D065Bicarbonate ion- [as HCO3]MO MAX report only all year
D065Solids, total suspendedMO AVG <= 30 mg/L all year
D065Solids, total suspendedMO MAX report only May, Sep
D065Solids, total suspendedMX WK AV <= 45 mg/L all year
D065Solids, total suspendedMO AVG <= 1089 kg/d all year
D065Solids, total suspendedMX WK AV <= 1633 kg/d all year
D065Nitrogen, total [as N]MO AVG report only all year
D065Nitrogen, ammonia total [as N]MO AVG report only all year
D065Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D065Nitrite + Nitrate total [as N]MO AVG report only all year
D065Phosphorus, total [as P]MO AVG report only all year
D065Phosphorus, total [as P]MO AVG report only all year
D065Calcium, total [as Ca]MO MAX report only all year
D065Magnesium, total [as Mg]MO MAX report only all year
D065Sodium, total [as Na]MO MAX report only all year
D065Potassium, total [as K]MO MAX report only all year
D065Chloride [as Cl]MO MAX report only all year
D065Sulfate, total [as SO4]MO MAX report only all year
D065Zinc, total [as Zn]DAILY MX report only May, Sep
D065Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D065Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D065Flow, in conduit or thru treatment plantMO AVG report only all year
D065Flow, in conduit or thru treatment plantMO MAX report only all year
D065Flow, in conduit or thru treatment plantMO TOTAL report only all year
D065Chlorine, total residualDAILY MX <= .038 mg/L all year
D065Solids, total dissolvedMO MAX report only all year
D065Mercury, dissolved [as Hg]MO MAX report only May, Sep
D065Mercury, total [as Hg]MO MAX report only May, Sep
D065BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D065BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D065BOD, carbonaceous [5 day, 20 C]MO AVG <= 907 kg/d all year
D065BOD, carbonaceous [5 day, 20 C]MX WK AV <= 1452 kg/d all year
D065BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D065Solids, suspended percent removalMO AV MN >= 85 % all year
S066Precipitation, total defined period/inMO TOTAL report only all year
S066pHMO MIN report only all year
S066pHMO MAX report only all year
S066Solids, total suspendedMO AVG report only all year
S066Solids, total suspendedMO MAX report only all year
S066Nitrogen, total [as N]MO AVG report only all year
S066Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S066Nitrite + Nitrate total [as N]MO AVG report only all year
S066Phosphorus, total [as P]MO AVG report only all year
S066Flow, in conduit or thru treatment plantMO AVG report only all year
S066Flow, in conduit or thru treatment plantMO MAX report only all year
S066Flow, in conduit or thru treatment plantMO TOTAL report only all year
S066BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S066BOD, 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