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Appleton city of

Sewage treatment plant, Appleton, Minnesota. NPDES permit MN0021890, in force until Jan 31, 2028. Last 12 months: over a limit 5 times (last September 2026), 1 required value missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D018 form A1 monthly (30 values), outfall S021 form A1 monthly (8 values)
Renewal application due
Aug 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 1 required value missing, 0 of 25 reports late

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

Period endingParameterReportedLimitOver by
April 2026Coliform, fecal MPN + membrane ftl 44.5 C, monthly geometric mean580≤ 200 #/100mL190%
May 2026Coliform, fecal MPN + membrane ftl 44.5 C, monthly geometric mean316≤ 200 #/100mL58%
July 2026Oxygen, dissolved [DO], monthly minimum5.4≥ 6 mg/L10%
August 2026Oxygen, dissolved [DO], monthly minimum4.7≥ 6 mg/L22%
September 2026Oxygen, dissolved [DO], monthly minimum4.9≥ 6 mg/L18%

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)Mar, SepD018
Oxygen, dissolved [DO]monthly minimum≥ 6 mg/Lall yearD018
pHmonthly minimum≥ 6 SUall yearD018
pHmonthly maximum≤ 9 SUall yearD018
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)Mar, SepD018
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD018
Solids, total suspendedmonthly maximumreport only (mg/L)JulD018
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD018
Solids, total suspendedmonthly average≤ 49.9 kg/dall yearD018
Solids, total suspendedmaximum weekly average≤ 74.84 kg/dall yearD018
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LOct, NovD018
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LJan, Feb, Mar, DecD018
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun–SepD018
Nitrogen, ammonia total [as N]monthly average≤ 18.13 kg/dOct, NovD018
Nitrogen, ammonia total [as N]monthly average≤ 19.96 kg/dJan, Feb, Mar, DecD018
Nitrogen, ammonia total [as N]monthly average≤ 2.49 kg/dJun–SepD018
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD018
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD018
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD018
Calcium, total [as Ca]monthly maximumreport only (mg/L)Mar, SepD018
Magnesium, total [as Mg]monthly maximumreport only (mg/L)Mar, SepD018
Sodium, total [as Na]monthly maximumreport only (mg/L)Mar, SepD018
Potassium, total [as K]monthly maximumreport only (mg/L)Mar, SepD018
Chloride [as Cl]monthly maximumreport only (mg/L)Mar, Jun, Sep, DecD018
Sulfate, total [as SO4]monthly maximumreport only (mg/L)Mar, SepD018
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)Mar, SepD018
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD018
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD018
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD018
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD018
Chlorine, total residualdaily maximum≤ .038 mg/LApr–OctD018
Solids, total dissolvedmonthly maximumreport only (mg/L)Mar, SepD018
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD018
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD018
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall yearD018
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 10 mg/Lall yearD018
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.316 kg/dall yearD018
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 16.63 kg/dall yearD018
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD018
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD018
Precipitation, total defined period/inmonthly totalreport only (in)all yearS021
pHmonthly minimumreport only (SU)all yearS021
pHmonthly maximumreport only (SU)all yearS021
Solids, total suspendedmonthly averagereport only (mg/L)all yearS021
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS021
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS021
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS021
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS021
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS021
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS021
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS021

New limits from Feb 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, total [as P], annual total608 kg/yrnew——

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/MN0021890 · MCP: https://passage-data.com/mcp