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Mindoro Sanitary District 1

Sewage treatment plant, Mindoro, Wisconsin. NPDES permit WI0029106 expired Dec 31, 2017; its limits still apply. Last 12 months: over a limit 17 times (last June 2026), 46 required values missing, 3 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (10 values), outfall 701 form A monthly (6 values), outfall 702 form A monthly (7 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 23 required values missing, 18 of 36 reports late

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

All 17 values over a limit
Period endingParameterReportedLimitOver by
January 2026Phosphorus, total [as P], monthly average1.0218≤ 1 mg/L2%
January 2026Solids, total suspended, monthly average39≤ 30 mg/L30%
January 2026Solids, total suspended, weekly average57≤ 45 mg/L27%
February 2026Phosphorus, total [as P], monthly average1.24≤ 1 mg/L24%
February 2026Solids, total suspended, monthly average61.25≤ 30 mg/L104%
February 2026Solids, total suspended, weekly average72≤ 45 mg/L60%
March 2026Solids, total suspended, monthly average48.6≤ 30 mg/L62%
March 2026Solids, total suspended, weekly average56≤ 45 mg/L24%
March 2026pH, daily maximum9.2≤ 9 SU—
April 2026Phosphorus, total [as P], monthly average1.1335≤ 1 mg/L13%
May 2026BOD, 5-day, 20 deg. C, monthly average63≤ 30 mg/L110%
May 2026BOD, 5-day, 20 deg. C, weekly average< 109≤ 45 mg/L142%
May 2026Phosphorus, total [as P], monthly average1.3995≤ 1 mg/L40%
May 2026Solids, total suspended, monthly average47.5≤ 30 mg/L58%
May 2026Solids, total suspended, weekly average51≤ 45 mg/L13%
June 2026BOD, 5-day, 20 deg. C, monthly average31.2≤ 30 mg/L4%
June 2026BOD, 5-day, 20 deg. C, weekly average< 51≤ 45 mg/L13%

Limits in force (23)

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]daily 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
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
Phosphorus, total [as P]daily 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

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/WI0029106 · MCP: https://passage-data.com/mcp