Heron Lake BioEnergy

NPDES permit MN0067385 · Minor NON-POTW · effective, expires 2027-09-30 · 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

4values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (4).

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
D001Specific conductanceMO MAX report only all year
D001pHINST MIN >= 6 SU all year
D001pHINST MAX <= 8.5 SU all year
D001Solids, total suspendedMO AVG <= 30 mg/L all year
D001Solids, total suspendedDAILY MX <= 54 mg/L all year
D001Phosphorus, total [as P]MO AVG report only all year
D001Organics, gasoline rangeMO MAX report only all year
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
D001EthanolMO MAX report only all year
D001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 42 mg/L all year
D001Duration of dischargeMO TOTAL 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