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Koch Fertilizer Wever, LLC

Nitrogenous Fertilizers, major discharger, Wever, Iowa. NPDES permit IA0052166 expired Feb 28, 2026; its limits still apply. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (8 values), outfall 002 form A monthly (10 values), outfall 005 form A monthly (7 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 36 reports late

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

Period endingOutfallParameterReportedLimitOver by
October 2025005Toxicity [acute], Ceriodaphnia dubia, daily maximum2≤ 1 N=0;Y=1100%
December 2025001pH, daily maximum9.3≤ 9 SU—

Limits in force (25)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Nitrogen, organic total [as N]30-day average≤ 1889 lb/dall year001
Nitrogen, organic total [as N]daily maximum≤ 3539 lb/dall year001
Nitrogen, ammonia total [as N]30-day average≤ 2266 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 4477 lb/dall year001
Nitrogen, nitrate total [as N]30-day average≤ 359 lb/dall year001
Nitrogen, nitrate total [as N]daily maximum≤ 1037 lb/dall year001
pHdaily minimum≥ 6 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspended30-day average≤ 30 mg/Lall year002
Solids, total suspended7-day average≤ 45 mg/Lall year002
Solids, total suspended30-day average≤ 1 lb/dall year002
Solids, total suspended7-day average≤ 1 lb/dall year002
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]30-day average≤ 1 lb/dall year002
BOD, carbonaceous [5 day, 20 C]7-day average≤ 1 lb/dall year002
Chlorine, total residual30-day average≤ 1.66 mg/Lall year005
Chlorine, total residualdaily maximum≤ 1.66 mg/Lall year005
Chlorine, total residual30-day average≤ 29.45 lb/dall year005
Chlorine, total residualdaily maximum≤ 29.45 lb/dall year005
E. coligeometric mean≤ 130 #/100mLMar–Nov005
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 N=0;Y=1all year005
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 N=0;Y=1all year005

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0052166 · MCP: https://passage-data.com/mcp