Madelia city of

NPDES permit MN0024040 · Major 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

0values over a limit
2required values missing, on 1 form(s)
0of 34 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 (62)

OutfallParameterStatisticLimitMonths
D077Specific conductanceMO MAX report only all year
D077Oxygen, dissolved [DO]MO MIN report only all year
D077pHMO MIN >= 6 SU all year
D077pHMO MAX <= 9 SU all year
D077Bicarbonate ion- [as HCO3]MO MAX report only all year
D077Solids, total suspendedMO AVG <= 30 mg/L all year
D077Solids, total suspendedMX WK AV <= 45 mg/L all year
D077Solids, total suspendedMO MAX report only May, Sep
D077Solids, total suspendedMO AVG <= 148.6 kg/d all year
D077Solids, total suspendedMX WK AV <= 222.8 kg/d all year
D077Nitrogen, total [as N]MO AVG report only all year
D077Nitrogen, ammonia total [as N]MO AVG <= 7.1 mg/L Oct, Nov
D077Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Dec
D077Nitrogen, ammonia total [as N]MO AVG <= 21 mg/L Apr, May
D077Nitrogen, ammonia total [as N]MO AVG <= 2.3 mg/L Jun, Jul, Aug, Sep
D077Nitrogen, ammonia total [as N]MO AVG <= 35.2 kg/d Oct, Nov
D077Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Dec
D077Nitrogen, ammonia total [as N]MO AVG <= 104 kg/d Apr, May
D077Nitrogen, ammonia total [as N]MO AVG <= 11.4 kg/d Jun, Jul, Aug, Sep
D077Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D077Nitrite + Nitrate total [as N]MO AVG report only all year
D077Phosphorus, total [as P]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D077Phosphorus, total [as P]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D077Phosphorus, total [as P]MO AVG <= 3.9 kg/d Jun, Jul, Aug, Sep
D077Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D077Phosphorus, total [as P]ANNL TOT <= 1448 kg/yr all year
D077Calcium, total [as Ca]MO MAX report only all year
D077Magnesium, total [as Mg]MO MAX report only all year
D077Sodium, total [as Na]MO MAX report only all year
D077Potassium, total [as K]MO MAX report only all year
D077Chloride [as Cl]DAILY MX <= 1240 mg/L all year
D077Sulfate, total [as SO4]MO MAX report only all year
D077Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D077Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D077Flow, in conduit or thru treatment plantMO AVG report only all year
D077Flow, in conduit or thru treatment plantMO MAX report only all year
D077Flow, in conduit or thru treatment plantMO TOTAL report only all year
D077Solids, total dissolvedMO MAX report only all year
D077Mercury, dissolved [as Hg]MO MAX report only May, Sep
D077Mercury, total [as Hg]MO MAX report only May, Sep
D077BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
D077BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L all year
D077BOD, carbonaceous [5 day, 20 C]MO AVG <= 49.5 kg/d all year
D077BOD, carbonaceous [5 day, 20 C]MX WK AV <= 74.3 kg/d all year
D077BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D077Solids, suspended percent removalMO AV MN >= 85 % all year
D079Solids, total suspendedANNL AVG report only all year
D079BOD, carbonaceous [5 day, 20 C]ANNL AVG report only all year
S078Precipitation, total defined period/inMO TOTAL report only all year
S078pHMO MIN report only all year
S078pHMO MAX report only all year
S078Solids, total suspendedMO AVG report only all year
S078Solids, total suspendedMO MAX report only all year
S078Nitrogen, total [as N]MO AVG report only all year
S078Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S078Nitrite + Nitrate total [as N]MO AVG report only all year
S078Phosphorus, total [as P]MO AVG report only all year
S078Flow, in conduit or thru treatment plantMO AVG report only all year
S078Flow, in conduit or thru treatment plantMO MAX report only all year
S078Flow, in conduit or thru treatment plantMO TOTAL report only all year
S078BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S078BOD, 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