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Wisconsin Rapids WWTF

Sewage treatment plant, major discharger, Wisconsin Rapids, Wisconsin. NPDES permit WI0025844 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit once (last December 2025), 63 required values missing, 16 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (16 values), outfall 001 form Q quarterly (4 values), outfall 701 form A monthly (9 values), outfall 701 form Q quarterly (1 value)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 62 required values missing, 16 of 32 reports late

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

Period endingParameterReportedLimit
December 2025pH, daily minimum5.9≥ 6 SU

Limits in force (32)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Nitrogen, total [as N]quarterly maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]weekly average≤ 34 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 34 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all 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 mg/Lall 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
Mercury, total recoverabledaily maximum≤ 6.7 ng/Lall year001
Coliform, fecal generalweekly geometric mean≤ 780 #/100mLMay–Sep001
Coliform, fecal generalgeometric mean≤ 400 #/100mLMay–Sep001
BOD, carbonaceous [5 day, 5 C]weekly average≤ 40 mg/LMay–Oct001
BOD, carbonaceous [5 day, 5 C]weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 5 C]monthly average≤ 25 mg/LMay–Oct001
BOD, carbonaceous [5 day, 5 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 5 C]monthly averagereport only (lb/d)May–Oct001
BOD, carbonaceous [5 day, 5 C]daily maximumreport only (lb/d)May–Oct001
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
BOD, carbonaceous [5 day, 5 C]monthly averagereport only (mg/L)all year701
BOD, carbonaceous [5 day, 5 C]daily 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/WI0025844 · MCP: https://passage-data.com/mcp