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City of Richland Center

Sewage treatment plant, major discharger, Richland Center, Wisconsin. NPDES permit WI0020109 expired Mar 31, 2018; its limits still apply. Last 12 months: no values over a limit, 42 required values missing, 16 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (13 values), outfall 703 form A monthly (7 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
5 values over a limit, 3 required values missing, 22 of 24 reports late

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
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/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Mercury, total recoverabledaily maximumreport only (ng/L)all year001
Coliform, fecal generalgeometric mean≤ 400 #/100mLMay–Sep001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year703
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year703
Solids, total suspendedmonthly averagereport only (mg/L)all year703
Solids, total suspendeddaily maximumreport only (mg/L)all year703
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year703
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year703
Mercury, total recoverabledaily maximumreport only (ng/L)all year703

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/WI0020109 · MCP: https://passage-data.com/mcp