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City of Waverly

Sewage treatment plant, major discharger, Waverly, Iowa. NPDES permit IA0033197, in force until Aug 31, 2031. 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 (19 values)
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 (63)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6 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≤ 806 lb/dall year
Solids, total suspended7-day average≤ 1208 lb/dall year
Nitrogen, total [as N]30-day average≤ 473.3 lb/dall year
Nitrogen, total [as N]daily maximum≤ 774.7 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 26 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 25.2 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 18 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 23.6 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 23.9 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 24.5 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 19 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 26.5 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 22.6 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 24.3 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 23.9 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 26 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 25.2 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 25.8 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 23.6 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 23.9 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 24.5 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 27.6 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 26.5 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 22.6 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 24.3 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 23.9 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 531.1 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 453.4 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 213.3 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 236.5 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 294 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 350.2 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 389.8 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 224.8 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 519.5 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 488.2 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 527.9 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 340.9 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 531.1 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 514.3 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 548.2 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 544.8 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 493.1 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 519.9 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 515.8 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 591.1 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 519.5 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 488.2 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 527.9 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 519.7 lb/dApr
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≤ 671 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 1074 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/IA0033197 · MCP: https://passage-data.com/mcp