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Cedarburg Wastewater Treatment

Sewage treatment plant, major discharger, Cedarburg, Wisconsin. NPDES permit WI0020222 expired Mar 31, 2022; its limits still apply. Last 12 months: no values over a limit, 62 required values missing, 12 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (23 values), outfall 701 form A monthly (6 values), outfall 001 form AN yearly, outfall 701 form AN yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 10 required values missing, 12 of 26 reports late

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 10 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)May–Oct001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 229 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 344 lb/dJan, Feb, Mar, Apr, Nov, Dec001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 15 mg/Lall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedweekly average≤ 344 lb/dall year001
Nitrogen, ammonia total [as N]weekly average≤ 13 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 11 mg/LOct001
Nitrogen, ammonia total [as N]weekly average≤ 8 mg/LApr001
Nitrogen, ammonia total [as N]weekly average≤ 5.3 mg/LMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 6.4 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 5.7 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 3.3 mg/LMay–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 21 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 21 mg/LApr001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May–Sep001
Phosphorus, total [as P]monthly average≤ .8 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (lb/d)all year001
Chloride [as Cl]daily maximumreport only (lb/d)all year001
Mercury, total recoverableannual maximumreport only (ng/L)all year001
Coliform, fecal generalweekly geometric mean≤ 656 #/100mLMay–Sep001
Coliform, fecal generalgeometric mean≤ 400 #/100mLMay–Sep001
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
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 recoverableannual 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/WI0020222 · MCP: https://passage-data.com/mcp