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Poet Biorefining - Menlo, LLC

Industrial Organic Chemicals, Menlo, Iowa. NPDES permit IA0081311 expired Jan 14, 2013; its limits still apply. Last 12 months: over a limit 6 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (15 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 1 value over a limit, 0 required values missing, 1 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
April 2026	Chlorine, total residual, 30-day average	.065	≤ .02 mg/L	225%
April 2026	Chlorine, total residual, 30-day average	.096532	≤ .073 lb/d	32%
April 2026	Chlorine, total residual, daily maximum	.25	≤ .035 mg/L	614%
April 2026	Chlorine, total residual, daily maximum	.375541	≤ .127 lb/d	196%
June 2026	Chlorine, total residual, daily maximum	.18	≤ .035 mg/L	414%
June 2026	Chlorine, total residual, daily maximum	.28844	≤ .127 lb/d	127%

Limits in force (15)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	daily minimum	≥ 5 mg/L	all year
pH	daily minimum	≥ 6 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Solids, total suspended	30-day average	≤ 100 lb/d	all year
Solids, total suspended	daily maximum	≤ 150 lb/d	all year
Iron, total [as Fe]	30-day average	≤ 1 mg/L	all year
Iron, total [as Fe]	daily maximum	≤ 1 mg/L	all year
Iron, total [as Fe]	30-day average	≤ 3.6 lb/d	all year
Iron, total [as Fe]	daily maximum	≤ 3.6 lb/d	all year
Chlorine, total residual	30-day average	≤ .02 mg/L	all year
Chlorine, total residual	daily maximum	≤ .035 mg/L	all year
Chlorine, total residual	30-day average	≤ .073 lb/d	all year
Chlorine, total residual	daily maximum	≤ .127 lb/d	all year

How strict are these limits?

Chlorine, total residual, 30-day average .02 mg/L — stricter than 56% of 106 other minor industrial and other permits in Iowa; 3% have the same limit
Chlorine, total residual, daily maximum .035 mg/L — stricter than 52% of 107 other minor industrial and other permits in Iowa; 3% have the same limit
Oxygen, dissolved [DO], daily minimum at least 5 mg/L — stricter than 51% of 86 other minor industrial and other permits in Iowa; 48% have the same limit

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/IA0081311 · MCP: https://passage-data.com/mcp