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Bois Forte WTR & San-Nett Lake

Sewage treatment plant, Nett Lake, Minnesota. NPDES permit MN0059447 expired Sep 13, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: form Q quarterly (12 values), form A quarterly, form AU, form QU
Last report on file
June 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 16 reports late

Limits in force (72)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHmaximum≤ 9 SUall year
pHminimumreport only (SU)all year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspended7-day average≤ 65 mg/Lall year
Solids, total suspendedmonthly average≤ 138 kg/dall year
Solids, total suspended30-day average≤ 138 kg/dall year
Solids, total suspendedweekly average≤ 199 kg/dall year
Solids, total suspended7-day average≤ 199 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (kg/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Sep
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]weekly average≤ 2 mg/Lall year
Phosphorus, total [as P]weekly average≤ 2 mg/Lall year
Phosphorus, total [as P]monthly average≤ 3.1 kg/dall year
Phosphorus, total [as P]monthly average≤ 3.1 kg/dall year
Phosphorus, total [as P]weekly average≤ 6.1 kg/dall year
Phosphorus, total [as P]weekly average≤ 6.1 kg/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (kg/d)all year
Sulfate, total [as SO4]monthly averagereport only (mg/L)Jun, Dec
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year
Sulfate, total [as SO4]maximumreport only (mg/L)all year
Rainfallmonthly totalreport only (in)all year
Rainfallmonthly totalreport only (in)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coligeometric mean≤ 126 #/100mLApr–Oct
E. coligeometric mean≤ 126 #/100mLApr–Oct
E. colimaximum≤ 410 #/100mLApr–Oct
E. colidaily maximum≤ 235 #/100mLApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 77 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 77 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 123 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 123 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (kg/d)all year
BOD, carb-5 day, 20 deg C, percent removalminimum≥ 85 %all year
BOD, carb-5 day, 20 deg C, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year

How strict are these limits?

Cited limits by parameter: Minnesota's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0059447 · MCP: https://passage-data.com/mcp