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City of Fort Atkinson

Sewage treatment plant, major discharger, Fort Atkinson, Wisconsin. NPDES permit WI0022489 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit, 72 required values missing, 8 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (19 values), outfall 001 form Q quarterly (4 values), outfall 701 form A monthly (7 values), outfall 701 form Q quarterly (1 value)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 32 required values missing, 16 of 32 reports late

Limits in force (41)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 45 mg/LFeb001
Solids, total suspendedweekly average≤ 45 mg/LApr, Jun, Sep, Nov001
Solids, total suspendedweekly average≤ 45 mg/LJan, Mar, May, Jul, Aug, Oct, Dec001
Solids, total suspendedmonthly average≤ 30 mg/LFeb001
Solids, total suspendedmonthly average≤ 30 mg/LApr, Jun, Sep, Nov001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Mar, May, Jul, Aug, Oct, Dec001
Solids, total suspendeddaily maximumreport only (mg/L)Feb001
Solids, total suspendeddaily maximumreport only (mg/L)Apr, Jun, Sep, Nov001
Solids, total suspendeddaily maximumreport only (mg/L)Jan, Mar, May, Jul, Aug, Oct, Dec001
Solids, total suspendedmonthly average≤ 732 lb/dFeb001
Solids, total suspendedmonthly average≤ 683 lb/dApr, Jun, Sep, Nov001
Solids, total suspendedmonthly average≤ 659 lb/dJan, Mar, May, Jul, Aug, Oct, Dec001
Solids, total suspendedweekly average≤ 966 lb/dFeb001
Solids, total suspendedweekly average≤ 902 lb/dApr, Jun, Sep, Nov001
Solids, total suspendedweekly average≤ 870 lb/dJan, Mar, May, Jul, Aug, Oct, Dec001
Nitrogen, total [as N]quarterly maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/Lall year001
Nitrogen, Kjeldahl, total [as N]quarterly maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]quarterly maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ 1.5 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
Chlorine, total residualweekly average≤ 30 ug/LMay–Sep001
Chlorine, total residualdaily maximum≤ 38 ug/LMay–Sep001
Mercury, total recoverabledaily maximum≤ 5 ng/Lall year001
Mercury, total recoverablequarterly maximumreport only (ng/L)all year001
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 recoverabledaily maximumreport only (ng/L)all year701
Mercury, total recoverablequarterly 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/WI0022489 · MCP: https://passage-data.com/mcp