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Westboro Sanitary District #1

Sewage treatment plant, Westboro, Wisconsin. NPDES permit WI0061107 expired Dec 31, 2022; its limits still apply. Last 12 months: no values over a limit, 37 required values missing, 10 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (11 values), outfall 001 form Q quarterly (1 value), outfall 701 form A monthly (4 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 27 required values missing, 10 of 28 reports late

Limits in force (19)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 38 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 20 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 5.6 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 2.9 lb/dMay–Oct001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Nitrogen, ammonia total [as N]quarterly maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ 2.2 mg/Lall year001
Phosphorus, total [as P]daily maximumreport only (mg/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

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/WI0061107 · MCP: https://passage-data.com/mcp