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Poet Biorefining - Corning

Industrial Organic Chemicals, Corning, Iowa. NPDES permit IA0080063, in force until Jul 31, 2029. Last 12 months: over a limit 7 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (18 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
March 2026Solids, total suspended, 30-day average57.2124≤ 39 lb/d47%
March 2026Solids, total suspended, 30-day average98≤ 30 mg/L227%
March 2026Solids, total suspended, daily maximum98≤ 45 mg/L118%
July 2026Nitrogen, ammonia total [as N], 30-day average15.28997≤ 8.2 lb/d86%
July 2026Nitrogen, ammonia total [as N], 30-day average9.06≤ 2.6 mg/L248%
July 2026Nitrogen, ammonia total [as N], daily maximum12.9≤ 6.8 mg/L90%
July 2026Nitrogen, ammonia total [as N], daily maximum20.87168≤ 15 lb/d39%

Limits in force (62)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 39 lb/dall year
Solids, total suspendeddaily maximum≤ 59 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 8.3 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 8.3 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 7.8 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 6.1 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 5.8 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 9.3 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 6.8 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 10.9 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 6.5 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 7.8 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 5.4 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 5.5 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 6.4 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 6.7 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 6.7 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 20.7 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 8.2 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 24.3 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 11.9 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 12.2 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 17.2 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 8.3 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 16.8 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 12.2 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 14.1 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 7.7 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 10.5 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 20.7 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 15 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 24.3 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.3 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 17.2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 12 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 16.8 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 12.2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 14.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 14.9 lb/dJun
Iron, total [as Fe]30-day average≤ 1 mg/Lall year
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year
Iron, total [as Fe]30-day average≤ 1.343 lb/dall year
Iron, total [as Fe]daily maximum≤ 1.343 lb/dall year
Chlorine, total residual30-day average≤ .02 mg/Lall year
Chlorine, total residualdaily maximum≤ .035 mg/Lall year
Chlorine, total residual30-day average≤ .035 lb/dall year
Chlorine, total residualdaily maximum≤ .061 lb/dall year

How strict are these limits?

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

Same industry: the 57 Chemicals and Allied Products permits in Iowa.

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Your permit document is the final word. As JSON: /api/v1/permits/IA0080063 · MCP: https://passage-data.com/mcp