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City of Treynor

Sewage treatment plant, Treynor, Iowa. NPDES permit IA0039977 expired Sep 30, 2022; its limits still apply. Last 12 months: over a limit 4 times (last November 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (26 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
28 values over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], 30-day average63.5≤ 25 mg/L154%
October 2025BOD, carbonaceous [5 day, 20 C], 7-day average69.3≤ 40 mg/L73%
November 2025BOD, carbonaceous [5 day, 20 C], 30-day average54.225≤ 25 mg/L117%
November 2025BOD, carbonaceous [5 day, 20 C], 7-day average62.2≤ 40 mg/L56%

Limits in force (71)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5.5 mg/LMar–Nov
Oxygen, dissolved [DO]daily minimum≥ 2.3 mg/LJan, Feb, Dec
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
pH30-day averagereport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 137 lb/dall year
Solids, total suspended7-day average≤ 206 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 3.3 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 3.7 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 3.5 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 5.2 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 2.9 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 10.3 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 13.6 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 4.9 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 3.7 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 4.1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 3.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 5.2 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 4.1 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 10.3 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 4.1 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 21.5 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 5.5 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 5.6 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 5.2 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 6.4 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 6 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 4.7 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 8.9 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 4.9 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 17.6 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 7 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 23.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 8.5 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 8.5 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 7.1 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 7 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 37 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 9.5 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 8.5 lb/dDec
E. coligeometric mean≤ 630 #/100mLMar–Nov
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]30-day average≤ 42 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 68 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa'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/IA0039977 · MCP: https://passage-data.com/mcp