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City of Elma

Sewage treatment plant, Elma, Iowa. NPDES permit IA0021075, in force until Mar 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (30 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (74)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 2.7 mg/Lall year
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≥ 6.4 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≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 100 lb/dall year
Solids, total suspended7-day average≤ 150 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≤ 4.2 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 16.6 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 6.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 10.4 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 15.3 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 6.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 14.9 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 18.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 16.6 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 17.8 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 17.1 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 17.5 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 17.4 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 18.4 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 16.3 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 17.5 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 16.8 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 19.7 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 7.4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 30.8 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 19.4 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 12.1 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 12.2 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 18.2 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 26.8 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 8.2 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 8.3 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 11.9 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 26.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 7.8 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 56.7 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 50.5 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 55.7 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 53.3 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 54.8 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 51.3 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 53.6 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 57.5 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 50.7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 54.8 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 51.8 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 61.6 lb/dJul
Copper, total [as Cu]30-day average≤ .03425 mg/Lall year
Copper, total [as Cu]daily maximum≤ .03425 mg/Lall year
Copper, total [as Cu]30-day average≤ .08969 lb/dall year
Copper, total [as Cu]daily maximum≤ .09452 lb/dall year
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≤ 83 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 133 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/IA0021075 · MCP: https://passage-data.com/mcp