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Silver Lake Sanitary District

Sewage treatment plant, Dakota, Wisconsin. NPDES permit WI0061301 expired Mar 31, 2023; its limits still apply. Last 12 months: no values over a limit, 66 required values missing, 28 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (13 values), outfall 701 form A monthly (6 values), outfall 702 form A monthly (6 values), outfall 703 form A monthly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 10 required values missing, 44 of 48 reports late

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall 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
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LApr001
Nitrogen, ammonia total [as N]weekly average≤ 19 mg/LMay001
Nitrogen, ammonia total [as N]weekly average≤ 25 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LMay001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 25 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LJan, Feb, Mar, Nov, Dec001
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
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
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year702
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year702
Solids, total suspendedmonthly averagereport only (mg/L)all year702
Solids, total suspendeddaily maximumreport only (mg/L)all year702
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year702
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year702
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

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/WI0061301 · MCP: https://passage-data.com/mcp