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City of Atlantic

Sewage treatment plant, major discharger, Atlantic, Iowa. NPDES permit IA0029025, in force until Feb 28, 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 (40 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 (84)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 3 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≤ 663 lb/dall year
Solids, total suspended7-day average≤ 995 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≤ 2.5 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 10.5 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 4.2 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 6.6 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 6.2 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 9 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 9.2 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 18.4 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 15.3 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 15.5 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 15.9 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 17.2 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 47 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 75.2 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 194.8 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 49.6 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 77 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 122.6 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 115.1 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 166.5 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 169.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 54 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 78 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 52.1 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 287 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 358.3 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 328.7 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 272 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 358.3 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 364.3 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 335.3 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 337.8 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 349.3 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 283 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 347.8 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 316 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
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≤ 553 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 884 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/IA0029025 · MCP: https://passage-data.com/mcp