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City of Eldora

Sewage treatment plant, major discharger, Eldora, Iowa. NPDES permit IA0025933, in force until Sep 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (61)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.1 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 379 lb/dall year
Solids, total suspended7-day average≤ 569 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 17.4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 6.2 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 15.4 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.2 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 17.9 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 7.4 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 13 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 10.4 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 9.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 17.4 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 16.9 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 19.6 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 17.9 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 17.5 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 18.6 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 17.7 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 169.4 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 49 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 34 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 106.7 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 31 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 147.5 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 33 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 57 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 38 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 99 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 79 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 67 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 198 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 202 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 234 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 214 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 215 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 208 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 192 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 209 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 221 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 196 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 199 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 210 lb/dOct
E. coligeometric mean≤ 126 #/100mLMar–Nov
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year
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≤ 316 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 505 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/IA0025933 · MCP: https://passage-data.com/mcp