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Appleton Wastewater Treatment

Sewage treatment plant, major discharger, Appleton, Wisconsin. NPDES permit WI0023221 expired Mar 31, 2022; its limits still apply. Last 12 months: over a limit 7 times (last June 2026), 122 required values missing, 16 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (31 values), outfall 701 form A monthly (13 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 8 required values missing, 20 of 24 reports late

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

Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, weekly average3303.8889≤ 2434 lb/d36%
February 2026Solids, total suspended, weekly average3979.7778≤ 2434 lb/d64%
March 2026Solids, total suspended, weekly average6247≤ 2434 lb/d157%
April 2026Solids, total suspended, monthly average2469.4333≤ 1322 lb/d87%
April 2026Solids, total suspended, weekly average26427.6667≤ 2434 lb/d986%
May 2026Solids, total suspended, weekly average14076.7778≤ 2434 lb/d478%
June 2026Solids, total suspended, weekly average14550.8889≤ 2434 lb/d498%

Limits in force (54)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 1322 lb/dall year001
Solids, total suspendedweekly average≤ 2434 lb/dall year001
Nitrogen, ammonia total [as N]weekly average≤ 11 mg/LJun–Sep001
Nitrogen, ammonia total [as N]weekly average≤ 28 mg/LJan–Mar001
Nitrogen, ammonia total [as N]weekly average≤ 29 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 4.4 mg/LJun–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan–Mar001
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 18 mg/LOct–Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 29 mg/LJun–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 29 mg/LJan–Mar001
Nitrogen, ammonia total [as N]daily maximum≤ 29 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 29 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 29 mg/LOct–Dec001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Nickel, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Cadmium, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Chromium, total recoverabledaily maximumreport only (ug/L)all year001
Copper, total recoverabledaily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualweekly average≤ 38 ug/LMay–Sep001
Chlorine, total residualmonthly average≤ 38 ug/LMay–Sep001
Chlorine, total residualdaily maximum≤ 38 ug/LMay–Sep001
Mercury, total recoverabledaily maximum≤ 3.4 ng/Lall year001
Coliform, fecal generalweekly geometric mean≤ 656 #/100mLMay–Sep001
Coliform, fecal generalgeometric mean≤ 400 #/100mLMay–Sep001
BOD, carbonaceous [5 day, 5 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 5 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 5 C]daily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year701
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year701
Solids, total suspendedmonthly averagereport only (mg/L)all year701
Solids, total suspendeddaily maximumreport only (mg/L)all year701
Nickel, total recoverabledaily maximumreport only (ug/L)all year701
Zinc, total recoverabledaily maximumreport only (ug/L)all year701
Cadmium, total recoverabledaily maximumreport only (ug/L)all year701
Lead, total recoverabledaily maximumreport only (ug/L)all year701
Chromium, total recoverabledaily maximumreport only (ug/L)all year701
Copper, total recoverabledaily maximumreport only (ug/L)all year701
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year701
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year701
Mercury, total recoverabledaily maximumreport only (ng/L)all year701

How strict are these limits?

Cited limits by parameter: Wisconsin'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/WI0023221 · MCP: https://passage-data.com/mcp