Dawson city of

NPDES permit MN0021881 · Minor POTW · effective, expires 2029-04-30 · 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.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
0required values missing, on 0 form(s)
0of 34 forms filed late

Last period with anything received: 2026-07-31. Most often over: Phosphorus, total [as P] (1).

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 (55)

OutfallParameterStatisticLimitMonths
D035Specific conductanceMO MAX report only all year
D035Oxygen, dissolved [DO]MO MIN >= 7 mg/L all year
D035pHMO MIN >= 6 SU all year
D035pHMO MAX <= 9 SU all year
D035Bicarbonate ion- [as HCO3]MO MAX report only all year
D035Solids, total suspendedMO AVG <= 30 mg/L all year
D035Solids, total suspendedMO MAX report only Jul
D035Solids, total suspendedMX WK AV <= 45 mg/L all year
D035Solids, total suspendedMO AVG <= 53.5 kg/d all year
D035Solids, total suspendedMX WK AV <= 80.1 kg/d all year
D035Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D035Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D035Nitrogen, ammonia total [as N]MO AVG <= 2.4 mg/L Oct, Nov
D035Nitrogen, ammonia total [as N]MO AVG <= 8.6 mg/L Apr, May
D035Nitrogen, ammonia total [as N]MO AVG <= 7.7 mg/L Jan, Feb, Mar, Dec
D035Nitrogen, ammonia total [as N]MO AVG <= 1.8 kg/d Jun, Jul, Aug, Sep
D035Nitrogen, ammonia total [as N]MO AVG <= 4.3 kg/d Oct, Nov
D035Nitrogen, ammonia total [as N]MO AVG <= 15.3 kg/d Apr, May
D035Nitrogen, ammonia total [as N]MO AVG <= 13.7 kg/d Jan, Feb, Mar, Dec
D035Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D035Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
D035Phosphorus, total [as P]MO AVG report only all year
D035Phosphorus, total [as P]MO AVG report only all year
D035Phosphorus, total [as P]ANNL TOT <= 817.2 kg/yr all year
D035Hardness, total [as CaCO3]MO MAX report only all year
D035Calcium, total [as Ca]MO MAX report only all year
D035Magnesium, total [as Mg]MO MAX report only all year
D035Sodium, total [as Na]MO MAX report only all year
D035Potassium, total [as K]MO MAX report only all year
D035Chloride [as Cl]MO AVG <= 671 mg/L all year
D035Sulfate, total [as SO4]MO MAX report only all year
D035Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D035Flow, in conduit or thru treatment plantMO AVG report only all year
D035Flow, in conduit or thru treatment plantMO MAX report only all year
D035Flow, in conduit or thru treatment plantMO TOTAL report only all year
D035Solids, total dissolvedMO MAX report only all year
D035Mercury, dissolved [as Hg]MO MAX report only Jul
D035Mercury, total [as Hg]MO MAX report only Jul
D035BOD, carbonaceous [5 day, 20 C]MO AVG <= 5 mg/L all year
D035BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L all year
D035BOD, carbonaceous [5 day, 20 C]MO AVG <= 8.9 kg/d all year
D035BOD, carbonaceous [5 day, 20 C]MX WK AV <= 26.7 kg/d all year
D035BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D035Solids, suspended percent removalMO AV MN >= 85 % all year
S036Precipitation, total defined period/inMO TOTAL report only all year
S036pHMO MIN report only all year
S036pHMO MAX report only all year
S036Solids, total suspendedMO AVG report only all year
S036Solids, total suspendedMO MAX report only all year
S036Nitrogen, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S036Nitrogen, Kjeldahl, total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S036Nitrite + Nitrate total [as N]QRTR AVG report only Mar, Jun, Sep, Dec
S036Phosphorus, total [as P]MO AVG report only all year
S036BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S036BOD, 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