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City of Story City

Sewage treatment plant, Story City, Iowa. NPDES permit IA0035882 expired Jul 31, 2024; its limits still apply. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (46 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 4 required values missing, 1 of 12 reports late

Limits in force (90)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 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≥ 6.5 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≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 237 lb/dall year
Solids, total suspended7-day average≤ 356 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, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.2 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.6 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 8.7 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 8.7 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 13 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 8.2 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 16 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 16 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 16 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 13.3 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 14.8 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 11.1 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 29.1 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 8.6 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 33.7 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 9 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 64 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 64 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dSep
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]30-day averagereport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)all year
Phosphorus, total [as P]30-day averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]30-day averagereport only (lb/d)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Copper, total [as Cu]30-day average≤ .03 mg/Lall year
Copper, total [as Cu]daily maximum≤ .051 mg/Lall year
Copper, total [as Cu]30-day average≤ .238 lb/dall year
Copper, total [as Cu]daily maximum≤ .403 lb/dall year
Aluminum, total [as Al]30-day average≤ .08904 mg/Lall year
Aluminum, total [as Al]daily maximum≤ .7512 mg/Lall year
Aluminum, total [as Al]30-day average≤ .6949 lb/dall year
Aluminum, total [as Al]daily maximum≤ 5.934 lb/dall year
E. coligeometric mean≤ 126 #/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≤ 198 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 316 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/IA0035882 · MCP: https://passage-data.com/mcp