Hennepin County Dept of Environment and Energy

NPDES permit MN0057525 · Minor NON-POTW · effective, expires 2031-06-30 · 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
0required values missing, on 0 form(s)
0of 22 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 (14)

OutfallParameterStatisticLimitMonths
D001Temperature, water deg. fahrenheitMO MAX <= 122 deg F all year
D001pHMO MIN >= 6 SU all year
D001pHMO MAX <= 9 SU all year
D001Solids, total suspendedMO AVG report only all year
D001Nitrogen, total [as N]DAILY MX report only all year
D001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
D001Nitrite + Nitrate total [as N]DAILY MX report only all year
D001Phosphorus, total [as P]MO AVG report only all year
D001Phosphorus, total [as P]ANNL TOT <= 258 kg/yr all year
D001Sulfate, total [as SO4]DAILY MX report only Mar, Jun, Sep, Dec
D001Flow, in conduit or thru treatment plantMO AVG report only all year
D001Flow, in conduit or thru treatment plantMO MAX report only all year
D001Flow, in conduit or thru treatment plantMO TOTAL report only all year
D001Chlorine, total residualDAILY MX <= .038 mg/L 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