GRAND PORTAGE RESERVATION WWSL

NPDES permit MN0025887 · Minor POTW · effective, expires 2027-08-29 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
294required values missing, on 14 form(s)
0of 14 forms filed late

Last period with anything received: none.

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 (66)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001pHMINIMUM >= 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMINIMUM report only all year
001pHMINIMUM report only all year
001pHMAXIMUM report only all year
001pHMAXIMUM report only all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 68 kg/d all year
001Solids, total suspendedMO AVG <= 68 kg/d all year
001Solids, total suspendedWKLY AVG <= 102 kg/d all year
001Solids, total suspendedWKLY AVG <= 102 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG <= .5 mg/L all year
001Phosphorus, total [as P]MO AVG <= .5 mg/L all year
001Phosphorus, total [as P]DAILY MX <= 1 mg/L all year
001Phosphorus, total [as P]DAILY MX <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG <= 1.13 kg/d all year
001Phosphorus, total [as P]MO AVG <= 1.13 kg/d all year
001Phosphorus, total [as P]DAILY MX <= 2.27 kg/d all year
001Phosphorus, total [as P]DAILY MX <= 2.27 kg/d all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001RainfallTOTAL report only all year
001RainfallTOTAL report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantWKLY AVG report only all year
001Flow, in conduit or thru treatment plantWKLY AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001E. coli30DAVGEO <= 126 #/100mL all year
001E. coli30DAVGEO <= 126 #/100mL all year
001E. coliDAILY MX <= 235 #/100mL all year
001E. coliDAILY MX <= 235 #/100mL all year
001Mercury, total [as Hg]MO AVG <= 2.26 ng/L all year
001Mercury, total [as Hg]MO AVG <= 2.26 ng/L all year
001Mercury, total [as Hg]MO AVG <= .00000513 kg/d all year
001Mercury, total [as Hg]MO AVG <= .00000513 kg/d all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 57 kg/d all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 57 kg/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 91 kg/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 91 kg/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001Carbonaceous oxygen demand, % removalMINIMUM >= 85 % all year
001Carbonaceous oxygen demand, % removalMINIMUM >= 85 % all year
001Outfall observation,visual, y/n responseMO AVG report only all year
001Outfall observation,visual, y/n responseMO AVG 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