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Village of Elmwood

Sewage treatment plant, Elmwood, Wisconsin. NPDES permit WI0023922 expired Dec 31, 2025; its limits still apply. Last 12 months: over a limit 2 times (last October 2025), 16 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 003 form A monthly (10 values), outfall 701 form A monthly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 25 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average47.9286≤ 30 mg/L60%
October 2025BOD, 5-day, 20 deg. C, weekly average121.6667≤ 45 mg/L170%

Limits in force (16)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year003
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year003
pHdaily minimum≥ 6 SUall year003
pHdaily maximum≤ 9 SUall year003
Solids, total suspendedweekly average≤ 45 mg/Lall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year003
Phosphorus, total [as P]monthly average≤ 1.9 mg/Lall year003
Phosphorus, total [as P]monthly average≤ 1.3 lb/dall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all year003
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year701
BOD, 5-day, 20 deg. Cmonthly maximumreport only (mg/L)all year701
Solids, total suspendedmonthly averagereport only (mg/L)all year701
Solids, total suspendedmonthly maximumreport only (mg/L)all year701
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year701
Flow, in conduit or thru treatment plantmonthly 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/WI0023922 · MCP: https://passage-data.com/mcp