Montrose city of

NPDES permit MN0024228 · Minor POTW · administratively continued, expires 2023-01-31 · 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 2023-01-31 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 37 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 (51)

OutfallParameterStatisticLimitMonths
D004Specific conductanceMO MAX report only all year
D004Oxygen, dissolved [DO]MO MIN report only all year
D004pHMO MIN >= 6 SU all year
D004pHMO MAX <= 9 SU all year
D004Bicarbonate ion- [as HCO3]MO MAX report only all year
D004Solids, total suspendedMO AVG <= 45 mg/L all year
D004Solids, total suspendedMO MAX report only Dec
D004Solids, total suspendedMX WK AV <= 65 mg/L all year
D004Solids, total suspendedMO AVG <= 133 kg/d all year
D004Solids, total suspendedMX WK AV <= 192 kg/d all year
D004Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D004Nitrogen, ammonia total [as N]MO AVG report only Mar, Sep
D004Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D004Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D004Phosphorus, total [as P]MO AVG <= 1 mg/L all year
D004Phosphorus, total [as P]MO AVG <= 1.3 kg/d Jun, Jul, Aug, Sep
D004Phosphorus, total [as P]ANNL TOT <= 1079 kg/yr all year
D004Calcium, total [as Ca]MO MAX report only all year
D004Magnesium, total [as Mg]MO MAX report only all year
D004Sodium, total [as Na]MO MAX report only all year
D004Potassium, total [as K]MO MAX report only all year
D004Chloride [as Cl]MO MAX report only all year
D004Sulfate, total [as SO4]MO MAX report only all year
D004Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D004Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D004Flow, in conduit or thru treatment plantMO AVG report only all year
D004Flow, in conduit or thru treatment plantMO MAX report only all year
D004Flow, in conduit or thru treatment plantMO TOTAL report only all year
D004Solids, total dissolvedMO AVG report only all year
D004Mercury, dissolved [as Hg]MO MAX report only Dec
D004Mercury, total [as Hg]MO MAX report only Dec
D004BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
D004BOD, carbonaceous [5 day, 20 C]MO AVG <= 74 kg/d all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 118 kg/d all year
D004BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D004Solids, suspended percent removalMO AV MN >= 85 % all year
S009Precipitation, total defined period/inMO TOTAL report only all year
S009pHMO MIN report only all year
S009pHMO MAX report only all year
S009Solids, total suspendedMO AVG report only all year
S009Solids, total suspendedMO MAX report only all year
S009Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S009Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S009Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S009Phosphorus, total [as P]MO AVG report only all year
S009Flow, in conduit or thru treatment plantMO AVG report only all year
S009Flow, in conduit or thru treatment plantMO MAX report only all year
S009Flow, in conduit or thru treatment plantMO TOTAL report only all year
S009BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S009BOD, 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