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City of Tomah

Sewage treatment plant, major discharger, Tomah, Wisconsin. NPDES permit WI0021318 expired Mar 31, 2024; its limits still apply. Last 12 months: over a limit 12 times (last May 2026), 54 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (19 values), outfall 001 form Q quarterly (4 values), outfall 701 form A monthly (6 values), outfall 701 form Q quarterly (1 value)
Last report on file
June 2026
Oct 2024 – Sep 2025
7 values over a limit, 12 required values missing, 0 of 32 reports late

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

Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, weekly average16.16≤ 15 mg/L8%
January 2026BOD, 5-day, 20 deg. C, weekly average26.9≤ 25 mg/L8%
February 2026BOD, 5-day, 20 deg. C, monthly average26.185≤ 25 mg/L5%
February 2026BOD, 5-day, 20 deg. C, weekly average31.32≤ 25 mg/L25%
March 2026BOD, 5-day, 20 deg. C, weekly average32.32≤ 25 mg/L29%
April 2026BOD, 5-day, 20 deg. C, monthly average27.2667≤ 25 mg/L9%
April 2026BOD, 5-day, 20 deg. C, weekly average31.46≤ 25 mg/L26%
April 2026BOD, 5-day, 20 deg. C, weekly average537.96≤ 479 lb/d12%
May 2026BOD, 5-day, 20 deg. C, monthly average27.7429≤ 15 mg/L85%
May 2026BOD, 5-day, 20 deg. C, weekly average39.14≤ 15 mg/L161%
May 2026BOD, 5-day, 20 deg. C, weekly average459.86≤ 288 lb/d60%
May 2026Nitrogen, ammonia total [as N], daily maximum11.1≤ 9.4 mg/L18%

Limits in force (49)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 8.5 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LMay, Jun, Sep, Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 13 mg/LJul, Aug001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 15 mg/LMay, Jun, Sep, Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 13 mg/LJul, Aug001
BOD, 5-day, 20 deg. Cweekly average≤ 479 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 288 lb/dMay, Jun, Sep, Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 249 lb/dJul, Aug001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 15 mg/LMay–Oct001
Solids, total suspendedmonthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 15 mg/LMay–Oct001
Solids, total suspendedweekly average≤ 479 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 288 lb/dMay–Oct001
Nitrogen, total [as N]quarterly maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]weekly average≤ 9.4 mg/LApr, May001
Nitrogen, ammonia total [as N]weekly average≤ 5.3 mg/LJun–Sep001
Nitrogen, ammonia total [as N]weekly average≤ 9.4 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 7.3 mg/LApr, May001
Nitrogen, ammonia total [as N]monthly average≤ 4.7 mg/LJun–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 9.4 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 9.4 mg/LApr, May001
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 mg/LJun–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 9.4 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]quarterly maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]quarterly maximumreport only (mg/L)all year001
Phosphorus, total [as P]6-month average≤ .6 mg/LApr, Oct001
Phosphorus, total [as P]monthly average≤ 1 mg/LApr, Oct001
Phosphorus, total [as P]monthly average≤ 1 mg/LJan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec001
Phosphorus, total [as P]monthly averagereport only (lb/d)Apr, Oct001
Phosphorus, total [as P]monthly averagereport only (lb/d)Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (lb/d)Apr, Oct001
Phosphorus, total [as P]daily maximumreport only (lb/d)Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Nov, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Mercury, total recoverabledaily maximum≤ 3.8 ng/Lall year001
Coliform, fecal generalweekly geometric mean≤ 780 #/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
Mercury, total recoverablequarterly maximumreport only (ng/L)all year701

How strict are these limits?

Cited limits by parameter: Wisconsin's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WI0021318 · MCP: https://passage-data.com/mcp