Owatonna city of

NPDES permit MN0051284 · Major POTW · administratively continued, expires 2026-05-31 · 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 2026-05-31 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
0required values missing, on 0 form(s)
0of 44 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 (65)

OutfallParameterStatisticLimitMonths
D046Specific conductanceMO MAX report only all year
D046Oxygen, dissolved [DO]MO MIN >= 5 mg/L all year
D046pHMO MIN >= 6 SU all year
D046pHMO MAX <= 9 SU all year
D046Bicarbonate ion- [as HCO3]MO MAX report only all year
D046Solids, total suspendedMO AVG <= 30 mg/L all year
D046Solids, total suspendedMX WK AV <= 45 mg/L all year
D046Solids, total suspendedQB report only Mar, Jun, Sep, Dec
D046Solids, total suspendedMO AVG <= 568 kg/d all year
D046Solids, total suspendedMX WK AV <= 851 kg/d all year
D046Nitrogen, total [as N]MO AVG report only all year
D046Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Dec
D046Nitrogen, ammonia total [as N]MO AVG <= 7 mg/L Oct, Nov
D046Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Apr, May
D046Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jun, Jul, Aug, Sep
D046Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Dec
D046Nitrogen, ammonia total [as N]MO AVG <= 241 kg/d Oct, Nov
D046Nitrogen, ammonia total [as N]MO AVG <= 138 kg/d Apr, May
D046Nitrogen, ammonia total [as N]MO AVG <= 52 kg/d Jun, Jul, Aug, Sep
D046Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D046Nitrite + Nitrate total [as N]MO AVG report only all year
D046Phosphorus, total [as P]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D046Phosphorus, total [as P]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D046Phosphorus, total [as P]MO AVG <= 18.9 kg/d Jun, Jul, Aug, Sep
D046Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D046Phosphorus, total [as P]ANNL TOT <= 5985 kg/yr all year
D046Cyanide, total [as CN]MO MAX report only May, Sep
D046Cyanide, free [amenable to chlorination]MO MAX report only May, Sep
D046Calcium, total [as Ca]MO MAX report only all year
D046Magnesium, total [as Mg]MO MAX report only all year
D046Sodium, total [as Na]MO MAX report only all year
D046Potassium, total [as K]MO MAX report only all year
D046Chloride [as Cl]MO MAX report only all year
D046Sulfate, total [as SO4]MO MAX report only all year
D046Cadmium, total [as Cd]MO MAX report only May, Sep
D046Chromium, hexavalent [as Cr]QB <= 29 ug/L Mar, Jun, Sep, Dec
D046Chromium, hexavalent [as Cr]QRTR AVG <= .38 kg/d Mar, Jun, Sep, Dec
D046Copper, total [as Cu]QB report only Mar, Jun, Sep, Dec
D046Lead, total [as Pb]MO MAX report only May, Sep
D046Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D046Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D046Flow, in conduit or thru treatment plantMO AVG report only all year
D046Flow, in conduit or thru treatment plantMO MAX report only all year
D046Flow, in conduit or thru treatment plantMO TOTAL report only all year
D046Chlorine, total residualDAILY MX <= .038 mg/L all year
D046Solids, total dissolvedMO MAX report only all year
D046Mercury, dissolved [as Hg]QB report only Mar, Jun, Sep, Dec
D046Mercury, total [as Hg]QB report only Mar, Jun, Sep, Dec
D046BOD, carbonaceous [5 day, 20 C]MO AVG <= 5 mg/L all year
D046BOD, carbonaceous [5 day, 20 C]MX WK AV <= 10 mg/L all year
D046BOD, carbonaceous [5 day, 20 C]MO AVG <= 172 kg/d all year
D046BOD, carbonaceous [5 day, 20 C]MX WK AV <= 344 kg/d all year
D046BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D046Solids, suspended percent removalMO AV MN >= 85 % all year
S049Precipitation, total defined period/inMO TOTAL report only all year
S049pHMO MIN report only all year
S049pHMO MAX report only all year
S049Solids, total suspendedMO AVG report only all year
S049Solids, total suspendedMO MAX report only all year
S049Nitrogen, total [as N]MO AVG report only all year
S049Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S049Nitrite + Nitrate total [as N]MO AVG report only all year
S049Phosphorus, total [as P]MO AVG report only all year
S049BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S049BOD, 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