Granite Falls Energy LLC

NPDES permit MN0066800 · Minor NON-POTW · expired, expires 2025-05-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-05-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 56 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 (80)

OutfallParameterStatisticLimitMonths
D005Temperature, water deg. fahrenheitMX DA AV <= 86 deg F all year
D005Specific conductanceMO AVG <= 1403 umho/cm all year
D005Specific conductanceDAILY MX <= 2430 umho/cm all year
D005pHINST MIN >= 6 SU all year
D005pHINST MAX <= 9 SU all year
D005Bicarbonate ion- [as HCO3]MO AVG <= 8.5 mg/L all year
D005Bicarbonate ion- [as HCO3]DAILY MX <= 15 mg/L all year
D005Solids, total suspendedMO AVG <= 30 mg/L all year
D005Solids, total suspendedDAILY MX <= 52 mg/L all year
D005Solids, total suspendedMO MAX report only Apr, Sep
D005Nitrogen, total [as N]MO AVG report only Apr, Sep
D005Nitrogen, ammonia total [as N]MO AVG report only Apr, Sep
D005Nitrogen, Kjeldahl, total [as N]MO AVG report only Apr, Sep
D005Nitrite + Nitrate total [as N]MO AVG report only Apr, Sep
D005Phosphorus, total [as P]MO AVG report only Jun, Jul, Aug, Sep
D005Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D005Phosphorus, total [as P]DAILY MX report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D005Phosphorus, total [as P]MO AVG <= 1.1 kg/d Jun, Jul, Aug, Sep
D005Phosphorus, total [as P]MO AVG report only Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
D005Phosphorus, total [as P]ANNL TOT <= 159 kg/yr all year
D005Calcium, total [as Ca]MO AVG report only all year
D005Calcium, total [as Ca]DAILY MX report only all year
D005Magnesium, total [as Mg]MO AVG report only all year
D005Magnesium, total [as Mg]DAILY MX report only all year
D005Sodium, total [as Na]MO AVG report only all year
D005Sodium, total [as Na]DAILY MX report only all year
D005Potassium, total [as K]MO AVG report only all year
D005Potassium, total [as K]DAILY MX report only all year
D005Chloride [as Cl]MO AVG <= 218 mg/L all year
D005Chloride [as Cl]DAILY MX <= 377 mg/L all year
D005Sulfate, total [as SO4]MO AVG <= 1403 mg/L all year
D005Sulfate, total [as SO4]DAILY MX <= 2430 mg/L all year
D005Boron, total [as B]MO AVG <= 701 ug/L all year
D005Boron, total [as B]DAILY MX <= 1215 ug/L all year
D005Aluminum, total [as Al]MO AVG <= 125 ug/L all year
D005Aluminum, total [as Al]DAILY MX <= 205 ug/L all year
D005Hardness, Ca Mg Calculated [mg/L as CaCO3]MO AVG <= 701 mg/L all year
D005Hardness, Ca Mg Calculated [mg/L as CaCO3]DAILY MX <= 1215 mg/L all year
D005Flow, in conduit or thru treatment plantMO AVG report only all year
D005Flow, in conduit or thru treatment plantMO MAX report only all year
D005Flow, in conduit or thru treatment plantMO TOTAL report only all year
D005Chlorine, total residualDAILY MX <= .038 mg/L all year
D005Solids, total dissolvedMO AVG <= 982 mg/L all year
D005Solids, total dissolvedDAILY MX <= 1701 mg/L all year
D005Mercury, dissolved [as Hg]MO MAX report only Apr, Sep
D005Mercury, total [as Hg]MO MAX report only Apr, Sep
D005BOD, carbonaceous [5 day, 20 C]MO AVG <= 5 mg/L all year
D005BOD, carbonaceous [5 day, 20 C]DAILY MX <= 8.7 mg/L all year
D006Specific conductanceMO AVG report only all year
D006pHINST MIN >= 6 SU all year
D006pHINST MAX <= 9 SU all year
D006Solids, total suspendedMO AVG <= 30 mg/L all year
D006Solids, total suspendedDAILY MX <= 44 mg/L all year
D006Phosphorus, total [as P]MO AVG report only all year
D006Organics, gasoline rangeMO AVG report only Mar, Jun, Sep, Dec
D006Flow, in conduit or thru treatment plantMO AVG report only all year
D006Flow, in conduit or thru treatment plantMO MAX report only all year
D006Flow, in conduit or thru treatment plantMO TOTAL report only all year
D006EthanolMO AVG report only Mar, Jun, Sep, Dec
D006BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D006BOD, carbonaceous [5 day, 20 C]DAILY MX <= 36 mg/L all year
D006Duration of dischargeMO TOTAL report only all year
D007Specific conductanceMO AVG report only all year
D007pHINST MIN >= 6 SU all year
D007pHINST MAX <= 9 SU all year
D007Solids, total suspendedMO AVG <= 30 mg/L all year
D007Solids, total suspendedDAILY MX <= 44 mg/L all year
D007Phosphorus, total [as P]MO AVG report only all year
D007Organics, gasoline rangeMO AVG report only Mar, Jun, Sep, Dec
D007Flow, in conduit or thru treatment plantMO AVG report only all year
D007Flow, in conduit or thru treatment plantMO MAX report only all year
D007Flow, in conduit or thru treatment plantMO TOTAL report only all year
D007EthanolMO AVG report only Mar, Jun, Sep, Dec
D007BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
D007BOD, carbonaceous [5 day, 20 C]DAILY MX <= 36 mg/L all year
D007Duration of dischargeMO TOTAL report only all year
S012Flow, in conduit or thru treatment plantMO AVG report only all year
S012Flow, in conduit or thru treatment plantANNL AVG report only Dec
S012Flow, in conduit or thru treatment plantINST MAX <= 1.44 MGD all year
S012Flow, in conduit or thru treatment plantMO 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