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Ellsworth Wastewater Treatment

Sewage treatment plant, Ellsworth, Wisconsin. NPDES permit WI0021253 expired Dec 31, 2021; its limits still apply. Last 12 months: over a limit 24 times (last April 2026), 69 required values missing, 18 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (17 values), outfall 701 form A monthly (6 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 22 of 24 reports late

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

All 24 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average64.7692≤ 20 mg/L224%
October 2025BOD, 5-day, 20 deg. C, weekly average97.6667≤ 30 mg/L226%
October 2025Coliform, fecal general, geometric mean2000≤ 400 #/100mL400%
October 2025Nitrogen, total [as N], monthly average32.425≤ 10 mg/L224%
October 2025Phosphorus, total [as P], monthly average2.0215≤ 1 mg/L102%
October 2025Solids, total suspended, monthly average52.6923≤ 20 mg/L163%
October 2025Solids, total suspended, weekly average100≤ 30 mg/L233%
November 2025BOD, 5-day, 20 deg. C, monthly average51≤ 20 mg/L155%
November 2025BOD, 5-day, 20 deg. C, weekly average< 70.6667≤ 30 mg/L136%
November 2025Nitrogen, total [as N], monthly average19.1≤ 10 mg/L91%
November 2025Solids, total suspended, monthly average27.9167≤ 20 mg/L40%
November 2025Solids, total suspended, weekly average36.6667≤ 30 mg/L22%
December 2025BOD, 5-day, 20 deg. C, monthly average25.6≤ 20 mg/L28%
December 2025BOD, 5-day, 20 deg. C, weekly average43.3333≤ 30 mg/L44%
December 2025Chloride [as Cl], monthly average429.5≤ 400 mg/L7%
December 2025Chloride [as Cl], weekly average429.5≤ 400 mg/L7%
January 2026Chloride [as Cl], monthly average1810.5≤ 1130 lb/d60%
January 2026Chloride [as Cl], monthly average648.75≤ 400 mg/L62%
January 2026Chloride [as Cl], weekly average865≤ 400 mg/L116%
January 2026Nitrogen, total [as N], monthly average14.075≤ 10 mg/L41%
February 2026Nitrogen, total [as N], monthly average21.025≤ 10 mg/L110%
March 2026Nitrogen, total [as N], monthly average16.776≤ 10 mg/L68%
March 2026Nitrogen, total [as N], monthly average16.776≤ 10 mg/L68%
April 2026Nitrogen, total [as N], monthly average14.95≤ 10 mg/L50%

Limits in force (23)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 4 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Nitrogen, total [as N]monthly average≤ 10 mg/Lall year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Chloride [as Cl]weekly average≤ 400 mg/Lall year001
Chloride [as Cl]monthly average≤ 400 mg/Lall year001
Chloride [as Cl]monthly average≤ 1130 lb/dall 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 generalgeometric mean≤ 400 #/100mLall 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

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/WI0021253 · MCP: https://passage-data.com/mcp