Comfrey city of

NPDES permit MN0021687 · Minor POTW · effective, expires 2029-07-31 · 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.

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

0values over a limit
0required values missing, on 0 form(s)
0of 36 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 (44)

OutfallParameterStatisticLimitMonths
D004Specific conductanceQB report only Mar, Jun, Sep, Dec
D004Oxygen, dissolved [DO]MO MIN report only all year
D004pHMO MIN >= 6 SU all year
D004pHMO MAX <= 9 SU all year
D004Solids, total suspendedMO AVG <= 30 mg/L all year
D004Solids, total suspendedMX WK AV <= 45 mg/L all year
D004Solids, total suspendedMO AVG <= 8.5 kg/d all year
D004Solids, total suspendedMX WK AV <= 12.8 kg/d all year
D004Nitrogen, total [as N]MO AVG report only Mar, Sep
D004Nitrogen, Kjeldahl, total [as N]MO AVG report only Mar, Sep
D004Nitrite + Nitrate total [as N]MO AVG report only Mar, Sep
D004Phosphorus, total [as P]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D004Phosphorus, total [as P]MO AVG <= 1 mg/L Jun, Jul, Aug, Sep
D004Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D004Phosphorus, total [as P]MO AVG <= 1.1 kg/d Jun, Jul, Aug, Sep
D004Phosphorus, total [as P]ANNL TOT <= 104 kg/yr all year
D004Chloride [as Cl]QB report only Mar, Jun, Sep, Dec
D004Sulfate, total [as SO4]QB report only Mar, Jun, Sep, Dec
D004Coliform, fecal MPN + membrane ftl 44.5 CMO GEOMN <= 200 #/100mL 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
D004Chlorine, total residualDAILY MX <= .038 mg/L May, Jun, Jul, Aug, Sep, Oct
D004Solids, total dissolvedQB report only Mar, Jun, Sep, Dec
D004BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 25 mg/L all year
D004BOD, carbonaceous [5 day, 20 C]MO AVG <= 4.3 kg/d all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 7.1 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
S005Precipitation, total defined period/inMO TOTAL report only all year
S005pHMO MIN report only all year
S005pHMO MAX report only all year
S005Solids, total suspendedMO AVG report only all year
S005Solids, total suspendedMO MAX report only all year
S005Nitrogen, total [as N]MO AVG report only Mar, Sep
S005Nitrogen, Kjeldahl, total [as N]MO AVG report only Mar, Sep
S005Nitrite + Nitrate total [as N]MO AVG report only Mar, Sep
S005Phosphorus, total [as P]MO AVG report only all year
S005Flow, in conduit or thru treatment plantMO AVG report only all year
S005Flow, in conduit or thru treatment plantMO MAX report only all year
S005Flow, in conduit or thru treatment plantMO TOTAL report only all year
S005BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S005BOD, 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