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Village of Patch Grove

Sewage treatment plant, Patch Grove, Wisconsin. NPDES permit WI0022705 expired Mar 31, 2023; its limits still apply. Last 12 months: over a limit 4 times (last March 2026), 40 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (15 values), outfall 701 form A monthly (4 values), outfall 001 form AN yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
5 values over a limit, 2 required values missing, 0 of 25 reports late

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

Period endingParameterReportedLimitOver by
January 2026Phosphorus, total [as P], monthly average1.915≤ 1 mg/L92%
January 2026Solids, total suspended, daily maximum84≤ 30 mg/L180%
January 2026Solids, total suspended, monthly average35.25≤ 20 mg/L76%
March 2026pH, daily minimum5.1≥ 6 SU—

Limits in force (24)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 4 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 30 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Nitrogen, ammonia total [as N]weekly average≤ 11 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 6.3 mg/LMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LMay–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 11 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 11 mg/LMay–Sep001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]annual averagereport only (lb/yr)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Phosphorus, total [as P]annual maximumreport only (lb/yr)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
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/WI0022705 · MCP: https://passage-data.com/mcp