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City of Belle Plaine

Sewage treatment plant, Belle Plaine, Iowa. NPDES permit IA0065404, in force until Oct 31, 2030. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (30 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

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
July 2026Oxygen, dissolved [DO], daily minimum4.8≥ 5 mg/L4%

Limits in force (74)

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≤ 152 lb/dall year
Solids, total suspended7-day average≤ 229 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, ammonia total [as N]30-day average≤ 2.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 15.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 14.5 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 12.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 12.5 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 11.8 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 6.6 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 12.6 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 7.9 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 7.7 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 5.4 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 20.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 17.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 8.8 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 17.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 4.8 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 5.1 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 74.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 73.3 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 81.1 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 79.7 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 79.7 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 66.5 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 72.1 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 74.6 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 77.1 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 77.1 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 55.9 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 56.9 lb/dJul
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
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≤ 127 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 203 lb/dall year

New limits from Oct 1, 2030

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Copper, total [as Cu], 30-day average0.0169 mg/Lnew——
Copper, total [as Cu], 30-day average0.0857 lb/dnew——
Copper, total [as Cu], daily maximum0.0269 mg/Lnew——
Copper, total [as Cu], daily maximum0.137 lb/dnew——

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/IA0065404 · MCP: https://passage-data.com/mcp