Lake Henry city of

NPDES permit MN0020885 · Minor POTW · effective, expires 2028-01-31 · EPA's file as of 2026-09-19

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

8values over a limit
6required values missing, on 2 form(s)
0of 36 forms filed late

Last period with anything received: 2026-08-31. Most often over: BOD, carbonaceous [5 day, 20 C] (4), BOD, carb-5 day, 20 deg C, percent removal (2), Solids, suspended percent removal (2).

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 (35)

OutfallParameterStatisticLimitMonths
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 <= 4.54 kg/d all year
D004Solids, total suspendedMX WK AV <= 6.81 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 report only all year
D004Phosphorus, total [as P]MO AVG report only all year
D004Phosphorus, total [as P]ANNL TOT <= 174 kg/yr all year
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
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 <= 3.79 kg/d all year
D004BOD, carbonaceous [5 day, 20 C]MX WK AV <= 6.06 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
S007Precipitation, total defined period/inMO TOTAL report only all year
S007pHMO MIN report only all year
S007pHMO MAX report only all year
S007Solids, total suspendedMO AVG report only all year
S007Solids, total suspendedMO MAX report only all year
S007Nitrogen, total [as N]MO AVG report only Mar, Sep
S007Nitrogen, Kjeldahl, total [as N]MO AVG report only Mar, Sep
S007Nitrite + Nitrate total [as N]MO AVG report only Mar, Sep
S007Phosphorus, total [as P]MO AVG report only all year
S007BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
S007BOD, 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