Long Prairie city of

NPDES permit MN0066079 · Major POTW · administratively continued, expires 2023-04-30 · 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.

This permit expired on 2023-04-30 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 57 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 (92)

OutfallParameterStatisticLimitMonths
D026Specific conductanceMO MAX report only all year
D026Oxygen, dissolved [DO]MO MIN >= 6 mg/L Jan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec
D026Oxygen, dissolved [DO]MO MIN report only Apr, May
D026pHMO MIN >= 6 SU all year
D026pHMO MAX <= 9 SU all year
D026Bicarbonate ion- [as HCO3]MO MAX report only all year
D026Solids, total suspendedMO AVG <= 30 mg/L all year
D026Solids, total suspendedMO MAX report only May, Sep
D026Solids, total suspendedMX WK AV <= 45 mg/L all year
D026Solids, total suspendedMO AVG <= 208 kg/d all year
D026Solids, total suspendedMX WK AV <= 312 kg/d all year
D026Nitrogen, total [as N]MO AVG report only all year
D026Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L Jun, Jul, Aug, Sep
D026Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D026Nitrogen, ammonia total [as N]MO AVG <= 34 kg/d Jun, Jul, Aug, Sep
D026Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D026Nitrite + Nitrate total [as N]MO AVG report only all year
D026Phosphorus, total [as P]1D <= 1 mg/L all year
D026Phosphorus, total [as P]MO AVG report only all year
D026Phosphorus, total [as P]MO AVG report only all year
D026Phosphorus, total [as P]ANNL TOT <= 2029 kg/yr all year
D026Calcium, total [as Ca]MO MAX report only all year
D026Magnesium, total [as Mg]MO MAX report only all year
D026Sodium, total [as Na]MO MAX report only all year
D026Potassium, total [as K]MO MAX report only all year
D026Chloride [as Cl]MO MAX report only all year
D026Sulfate, total [as SO4]MO MAX report only all year
D026Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
D026Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
D026Flow, in conduit or thru treatment plantMO AVG report only all year
D026Flow, in conduit or thru treatment plantMO MAX report only all year
D026Flow, in conduit or thru treatment plantMO TOTAL report only all year
D026Chlorine, total residualDAILY MX <= .038 mg/L all year
D026Solids, total dissolvedMO MAX report only all year
D026Mercury, dissolved [as Hg]MO MAX report only May, Sep
D026Mercury, total [as Hg]MO MAX report only May, Sep
D026BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L all year
D026BOD, carbonaceous [5 day, 20 C]MX WK AV <= 25 mg/L all year
D026BOD, carbonaceous [5 day, 20 C]MO AVG <= 104 kg/d all year
D026BOD, carbonaceous [5 day, 20 C]MX WK AV <= 173.5 kg/d all year
D026BOD, carb-5 day, 20 deg C, percent removalMO AV MN >= 85 % all year
D026Solids, suspended percent removalMO AV MN >= 85 % all year
S029Specific conductanceMO MAX report only all year
S029Precipitation, total defined period/inMO TOTAL report only all year
S029pHMO MIN report only all year
S029pHMO MAX report only all year
S029Bicarbonate ion- [as HCO3]MO MAX report only all year
S029Solids, total suspendedMO AVG report only all year
S029Solids, total suspendedMO MAX report only all year
S029Nitrogen, total [as N]MO AVG report only all year
S029Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
S029Nitrite + Nitrate total [as N]MO AVG report only all year
S029Phosphorus, total [as P]MO AVG report only all year
S029Calcium, total [as Ca]MO MAX report only all year
S029Magnesium, total [as Mg]MO MAX report only all year
S029Sodium, total [as Na]MO MAX report only all year
S029Potassium, total [as K]MO MAX report only all year
S029Chloride [as Cl]MO MAX report only all year
S029Sulfate, total [as SO4]MO MAX report only all year
S029Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
S029Flow, in conduit or thru treatment plantMO AVG report only all year
S029Flow, in conduit or thru treatment plantMO MAX report only all year
S029Flow, in conduit or thru treatment plantMO TOTAL report only all year
S029Solids, total dissolvedMO MAX report only all year
S029BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S029BOD, carbonaceous [5 day, 20 C]MO MAX report only all year
W027Temperature, water deg. centigradeMO MAX report only all year
W027Specific conductanceMO MAX report only all year
W027pHMO MAX report only all year
W027Bicarbonate ion- [as HCO3]MO MAX report only all year
W027Nitrogen, ammonia total [as N]MO MAX report only all year
W027Calcium, total [as Ca]MO MAX report only all year
W027Magnesium, total [as Mg]MO MAX report only all year
W027Sodium, total [as Na]MO MAX report only all year
W027Potassium, total [as K]MO MAX report only all year
W027Chloride [as Cl]MO MAX report only all year
W027Sulfate, total [as SO4]MO MAX report only all year
W027Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W027Solids, total dissolvedMO MAX report only all year
W028Temperature, water deg. centigradeMO MAX report only all year
W028Specific conductanceMO MAX report only all year
W028pHMO MAX report only all year
W028Bicarbonate ion- [as HCO3]MO MAX report only all year
W028Nitrogen, ammonia total [as N]MO MAX report only all year
W028Calcium, total [as Ca]MO MAX report only all year
W028Magnesium, total [as Mg]MO MAX report only all year
W028Sodium, total [as Na]MO MAX report only all year
W028Potassium, total [as K]MO MAX report only all year
W028Chloride [as Cl]MO MAX report only all year
W028Sulfate, total [as SO4]MO MAX report only all year
W028Hardness, Ca Mg Calculated [mg/L as CaCO3]MO MAX report only all year
W028Solids, total dissolvedMO 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