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City of Montreal

Sewage treatment plant, Montreal, Wisconsin. NPDES permit WI0022306 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 52 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 (18 values), outfall 701 form A monthly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
8 values over a limit, 11 required values missing, 12 of 24 reports late

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

Period endingParameterReportedLimitOver by
December 2025Phosphorus, total [as P], monthly average1.96≤ 1.95 mg/L1%
January 2026Phosphorus, total [as P], monthly average2.775≤ 1.95 mg/L42%
February 2026Phosphorus, total [as P], monthly average2.775≤ 1.95 mg/L42%
May 2026Chlorine, total residual, weekly average26≤ 25 ug/L4%
June 2026Chlorine, total residual, weekly average30≤ 25 ug/L20%

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)Jul–Sep001
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≤ 101 mg/LJun–Sep001
Nitrogen, ammonia total [as N]weekly average≤ 101 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 101 mg/LApr, May001
Nitrogen, ammonia total [as N]monthly average≤ 86 mg/LJun–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 45 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 52 mg/LApr, May001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jun–Sep001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr, May001
Phosphorus, total [as P]monthly average≤ 1.95 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
Chlorine, total residualweekly average≤ 25 ug/LMay–Sep001
Chlorine, total residualmonthly average≤ 25 ug/LMay–Sep001
Chlorine, total residualdaily maximum≤ 38 ug/LMay–Sep001
Coliform, fecal generalweekly geometric mean≤ 660 #/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

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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Your permit document is the final word. As JSON: /api/v1/permits/WI0022306 · MCP: https://passage-data.com/mcp