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City of Laporte City

Sewage treatment plant, La Porte City, Iowa. NPDES permit IA0035963, in force until Nov 30, 2026. 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 (35 values)
Renewal application due
Jun 3, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (79)

ParameterStatisticLimitMonths
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≥ 6.2 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≤ 142 lb/dall year
Solids, total suspended7-day average≤ 212 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 average≤ 116.7 lb/dall year
Nitrogen, total [as N]daily maximum≤ 191 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 16.4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 6.6 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 10.7 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 6.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 6.7 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 4.2 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 14.8 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 10.1 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 8.8 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 17.1 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 17.6 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 18.1 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 17.3 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 17.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 19.2 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 46.9 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 18.1 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 11.3 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 29.5 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 18.5 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 12.6 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 18.6 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 12.6 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 40.8 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 11.9 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 27.8 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 24.3 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 71.8 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 77 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 79 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 78.9 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 74.7 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 81 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 77 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 71 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 76 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 86 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 72 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 73 lb/dMar
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
Chloride [as Cl]30-day averagereport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Chloride [as Cl]30-day averagereport only (lb/d)all year
Chloride [as Cl]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≤ 118 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 189 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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0035963 · MCP: https://passage-data.com/mcp