POET Biorefining - Preston, LLC

NPDES permit MN0064017 · Minor NON-POTW · effective, expires 2027-07-31 · 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

2values over a limit
0required values missing, on 0 form(s)
0of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (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 (40)

OutfallParameterStatisticLimitMonths
D002Temperature, water deg. fahrenheitMX DA AV report only all year
D002Specific conductanceMO MAX report only all year
D002Precipitation, total defined period/inMO TOTAL report only all year
D002pHINST MIN >= 6 SU all year
D002pHINST MAX <= 9 SU all year
D002Solids, total suspendedMO AVG <= 30 mg/L all year
D002Solids, total suspendedDAILY MX <= 44 mg/L all year
D002Nitrogen, ammonia total [as N]MO AVG report only all year
D002Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D002Nitrite + Nitrate total [as N]MO AVG report only all year
D002Phosphorus, total [as P]MO AVG report only all year
D002Organics, gasoline rangeMO MAX report only all year
D002Flow, in conduit or thru treatment plantMO AVG report only all year
D002Flow, in conduit or thru treatment plantMO MAX report only all year
D002Flow, in conduit or thru treatment plantMO TOTAL report only all year
D002Chlorine, total residualDAILY MX <= .038 mg/L all year
D002EthanolMO MAX report only all year
D002BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 37 mg/L all year
D002Duration of dischargeMO TOTAL report only all year
D003Temperature, water deg. fahrenheitMX DA AV report only all year
D003Specific conductanceMO MAX report only all year
D003Precipitation, total defined period/inMO TOTAL report only all year
D003pHINST MIN >= 6 SU all year
D003pHINST MAX <= 9 SU all year
D003Solids, total suspendedMO AVG <= 30 mg/L all year
D003Solids, total suspendedDAILY MX <= 44 mg/L all year
D003Nitrogen, ammonia total [as N]MO AVG report only all year
D003Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
D003Nitrite + Nitrate total [as N]MO AVG report only all year
D003Phosphorus, total [as P]MO AVG report only all year
D003Organics, gasoline rangeMO MAX report only all year
D003Flow, in conduit or thru treatment plantMO AVG report only all year
D003Flow, in conduit or thru treatment plantMO MAX report only all year
D003Flow, in conduit or thru treatment plantMO TOTAL report only all year
D003Chlorine, total residualDAILY MX <= .038 mg/L all year
D003EthanolMO MAX report only all year
D003BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D003BOD, carbonaceous [5 day, 20 C]DAILY MX <= 37 mg/L all year
D003Duration 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