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Sherburn city of

Sewage treatment plant, Sherburn, Minnesota. NPDES permit MN0024872 expired May 31, 2026; its limits still apply. Last 12 months: over a limit 4 times (last August 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D030 form A1 monthly (30 values), outfall D030 form A3 monthly (1 value), outfall S031 form A1 monthly (11 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 37 reports late

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

Period endingParameterReportedLimitOver by
April 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum73≥ 85 %80%
May 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum76≥ 85 %60%
July 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum82≥ 85 %20%
August 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum81≥ 85 %27%

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)Mar, SepD030
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD030
pHmonthly minimum≥ 6 SUall yearD030
pHmonthly maximum≤ 9 SUall yearD030
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)Mar, SepD030
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD030
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD030
Solids, total suspendedmonthly maximumreport only (mg/L)JulD030
Solids, total suspendedmonthly average≤ 38 kg/dall yearD030
Solids, total suspendedmaximum weekly average≤ 60 kg/dall yearD030
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD030
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD030
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD030
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD030
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD030
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD030
Phosphorus, total [as P]annual total≤ 459 kg/yrall yearD030
Chloride [as Cl]monthly maximumreport only (mg/L)Mar, SepD030
Sulfate, total [as SO4]monthly maximumreport only (mg/L)Mar, SepD030
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)Mar, SepD030
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLMay–OctD030
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD030
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD030
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD030
Chlorine, total residualdaily maximum≤ .038 mg/Lall yearD030
Solids, total dissolvedmonthly maximumreport only (mg/L)Mar, SepD030
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD030
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD030
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall yearD030
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 25 mg/Lall yearD030
BOD, carbonaceous [5 day, 20 C]monthly average≤ 19 kg/dall yearD030
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 30 kg/dall yearD030
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD030
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD030
Precipitation, total defined period/inmonthly totalreport only (in)all yearS031
pHmonthly minimumreport only (SU)all yearS031
pHmonthly maximumreport only (SU)all yearS031
Solids, total suspendedmonthly averagereport only (mg/L)all yearS031
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS031
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS031
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS031
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS031
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS031
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS031
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS031

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/MN0024872 · MCP: https://passage-data.com/mcp