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Athens Wastewater Treatment Fa

Sewage treatment plant, Athens, Wisconsin. NPDES permit WI0022365 expired Mar 31, 2023; its limits still apply. Last 12 months: over a limit 2 times (last November 2025), 71 required values missing, 4 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (13 values), outfall 001 form Q quarterly (1 value), outfall 701 form A monthly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 35 required values missing, 13 of 28 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, monthly average38.2222≤ 30 mg/L27%
November 2025Solids, total suspended, weekly average51.3333≤ 45 mg/L14%

Limits in force (20)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 55 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 55 lb/dall year001
Phosphorus, total [as P]monthly average≤ 5.8 mg/Lall year001
Copper, total recoverablequarterly 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
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

How strict are these limits?

Cited limits by parameter: Wisconsin's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WI0022365 · MCP: https://passage-data.com/mcp