Passage Data · Check a report · Use it from your AI

City of Ogden

Sewage treatment plant, major discharger, Ogden, Iowa. NPDES permit IA0041904, 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 (72)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6.5 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≤ 305 lb/dall year
Solids, total suspended7-day average≤ 457 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 2.9 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.1 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 2.2 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 5 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.9 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 1.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 14.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 14.8 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.3 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 16.1 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 16.6 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 15.3 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 14.3 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 14.5 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 17.7 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16.3 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 24.8 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 36.4 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 36.4 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 26.5 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 11.3 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 16.6 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 18.6 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 42.2 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 14 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 16.3 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 10.7 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 10.2 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 149.4 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 149.4 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 154.5 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 162.3 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 167.7 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 159.7 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 154.5 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 144.5 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 146.9 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 159.7 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 178.8 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 165 lb/dAug
Nitrogen, nitrate total [as N]30-day average≤ 179 lb/dall year
Nitrogen, nitrate total [as N]daily maximum≤ 292 lb/dall year
Copper, total [as Cu]30-day average≤ .031 mg/Lall year
Copper, total [as Cu]daily maximum≤ .0566 mg/Lall year
Copper, total [as Cu]30-day average≤ .2991 lb/dall year
Copper, total [as Cu]daily maximum≤ .5722 lb/dall year
Phenols30-day average≤ .05327 mg/Lall year
Phenolsdaily maximum≤ 2.516 mg/Lall year
Phenols30-day average≤ .5146 lb/dall year
Phenolsdaily maximum≤ 25.43 lb/dall year
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≤ 254 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 406 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa's rules and the federal ones.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0041904 · MCP: https://passage-data.com/mcp