Aurora city of

NPDES permit MN0020494 · Minor 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 28 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 (54)

OutfallParameterStatisticLimitMonths
D009Specific conductanceMO AVG 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 AVG report only all year
D009Solids, total suspendedMO AVG report only May, Sep
D009Solids, total suspendedMO AVG <= 30 mg/L all year
D009Solids, total suspendedDAILY MX report only May, Sep
D009Solids, total suspendedMX WK AV <= 45 mg/L all year
D009Solids, total suspendedMO AVG <= 103.3 kg/d all year
D009Solids, total suspendedMX WK AV <= 155 kg/d all year
D009Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D009Nitrogen, ammonia total [as N]MO AVG <= 12 mg/L Jun, Jul, Aug, Sep
D009Nitrogen, ammonia total [as N]MO AVG report only Mar, Dec
D009Nitrogen, ammonia total [as N]MO AVG <= 41.3 kg/d Jun, Jul, Aug, Sep
D009Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D009Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D009Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D009Phosphorus, total [as P]MO AVG report only all year
D009Calcium, total [as Ca]MO AVG report only all year
D009Magnesium, total [as Mg]MO AVG report only all year
D009Sodium, total [as Na]MO AVG report only all year
D009Potassium, total [as K]MO AVG report only all year
D009Hardness, Ca Mg Calculated [mg/L as CaCO3]MO AVG 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 all year
D009Flow, in conduit or thru treatment plantMO MAX report only all year
D009Flow, in conduit or thru treatment plantMO TOTAL report only all year
D009Chlorine, total residualDAILY MX <= .038 mg/L all year
D009Solids, total dissolvedMO AVG report only all year
D009Mercury, dissolved [as Hg]MO AVG report only May, Sep
D009Mercury, dissolved [as Hg]DAILY MX report only May, Sep
D009Mercury, total [as Hg]MO AVG <= 5.86 ng/L May, Sep
D009Mercury, total [as Hg]DAILY MX <= 3.5 ng/L May, Sep
D009BOD, carbonaceous [5 day, 20 C]MO AVG <= 5 mg/L all year
D009BOD, carbonaceous [5 day, 20 C]MX WK AV <= 10 mg/L all year
D009BOD, carbonaceous [5 day, 20 C]MO AVG <= 17.2 kg/d all year
D009BOD, carbonaceous [5 day, 20 C]MX WK AV <= 34.4 kg/d all year
D009BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D009Solids, suspended percent removalMO AV MN >= 85 % all year
S013Precipitation, total defined period/inMO TOTAL report only all year
S013pHMO MIN report only all year
S013pHMO MAX report only all year
S013Solids, total suspendedMO AVG report only all year
S013Solids, total suspendedMO AVG report only May, Sep
S013Solids, total suspendedMO MAX report only all year
S013Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S013Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S013Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S013Phosphorus, total [as P]MO AVG report only all year
S013Mercury, dissolved [as Hg]MO AVG report only May, Sep
S013Mercury, total [as Hg]MO AVG report only May, Sep
S013BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S013BOD, 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