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Waubun

Sewage treatment plant, Waubun, Minnesota. NPDES permit MN0022110 expired May 23, 2023; its limits still apply. Last 12 months: over a limit 2 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: form Q quarterly (18 values), form P quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 16 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimit
November 2025pH, monthly maximum9.15 SU≤ 9 SU
May 2026pH, monthly maximum9.54 SU≤ 9 SU

Limits in force (88)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all year
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all year
pHmonthly minimum≥ 6 SUall year
pHmonthly minimum≥ 6 SUall year
pHmonthly maximum≤ 9 SUall year
pHmonthly maximum≤ 9 SUall year
pHdaily minimumreport only (SU)all year
pHdaily minimumreport only (SU)all year
pHdaily maximumreport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspendedmonthly average≤ 107 kg/dall year
Solids, total suspendedmonthly average≤ 107 kg/dall year
Solids, total suspendedmonthly average≤ 80 kg/dall year
Solids, total suspendedmonthly average≤ 80 kg/dall year
Solids, total suspendedweekly average≤ 115 kg/dall year
Solids, total suspendedweekly average≤ 115 kg/dall year
Solids, total suspendedweekly average≤ 116 kg/dall year
Solids, total suspendedweekly average≤ 116 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, Sep
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)Jun, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Sep
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)Jun, Dec
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Sep
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)Jun, Dec
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Sep
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Sep
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
Phosphorus, total [as P]monthly averagereport only (kg/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Sulfate, total [as SO4]monthly averagereport only (mg/L)Jun, Dec
Sulfate, total [as SO4]monthly averagereport only (mg/L)Jun, Dec
Rainfalltotalreport only (in)all year
Rainfalltotalreport 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. colimonthly geometric mean≤ 126 #/100mLApr–Oct
E. colimonthly geometric mean≤ 126 #/100mLApr–Oct
E. colidaily maximum≤ 410 #/100mLApr–Oct
E. colidaily maximum≤ 410 #/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]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]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≤ 60 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 60 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 44 kg/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 44 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 95 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 95 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 71 kg/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 71 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, carb-5 day, 20 deg C, percent removalminimum % removal≥ 85 %all year
BOD, carb-5 day, 20 deg C, percent removalminimum % removal≥ 85 %all year
Solids, suspended percent removalminimum % removal≥ 65 %all year
Solids, suspended percent removalminimum % removal≥ 65 %all year
Outfall observation,visual, y/n responsevaluereport only (Y=0;N=1)all year
Outfall observation,visual, y/n responsevaluereport only (Y=0;N=1)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0022110 · MCP: https://passage-data.com/mcp