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Owen City

Sewage treatment plant, Owen, Wisconsin. NPDES permit WI0020940 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit once (last June 2026), 66 required values missing, 24 of 45 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), outfall 702 form A monthly (6 values), outfall 704 form A monthly (2 values), outfall 001 form AN yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 10 required values missing, 36 of 49 reports late

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

Period endingParameterReportedLimitOver by
June 2026Oxygen, dissolved [DO], daily minimum5.7≥ 6 mg/L5%

Limits in force (43)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 27 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 27 mg/LMay–Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 95.9 lb/dMay–Oct001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)May–Oct001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 27 mg/LMay–Oct001
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 27 mg/LMay–Oct001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 95.9 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 29 mg/LNov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 35 mg/LJan–Apr001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 27 mg/LNov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 32 mg/LJan–Apr001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan–Apr001
Phosphorus, total [as P]monthly average≤ .8 mg/Lall year001
Phosphorus, total [as P]annual averagereport only (lb/yr)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
Coliform, fecal generalweekly geometric mean≤ 656 #/100mLMay–Sep001
Coliform, fecal generalmonthly average≤ 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
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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year702
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year702
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year704
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year704

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/WI0020940 · MCP: https://passage-data.com/mcp