Zip Code 50532

📍 Duncombe, IA

Toxic Air Emissions Report (2024)

Data Source: EPA TRI (2024) • Updated Nov 2025

475,407.00 lbs

State Score

/ 100

National Score

/ 100

In 2024, industrial facilities in Duncombe, IA released over 475,407.00 lbs of pollutants. The primary source was KOCH FERTILIZER FT. DODGE LLC, which emitted large quantities of Ammonia into the local air. Residents of 50532 face significantly higher exposure risks than the national average.

Top Polluting Facilities

KOCH FERTILIZER FT. DODGE LLC

Owned by: KOCH INC.

Ammonia released to air

463,000.00 lbs

LBS
KOCH FERTILIZER FT. DODGE LLC

Owned by: KOCH INC.

Methanol released to air

9,000.00 lbs

LBS
KOCH FERTILIZER FT. DODGE LLC

Owned by: KOCH INC.

Nitrate compounds (water dissociable; reportable only when in aqueous solution) released to air

3,000.00 lbs

LBS
KOCH FERTILIZER FT. DODGE LLC

Owned by: KOCH INC.

Nitric acid released to air

255.00 lbs

LBS
KOCH FERTILIZER FT. DODGE LLC

Owned by: KOCH INC.

Zinc compounds released to air

150.00 lbs

LBS
KOCH FERTILIZER FT. DODGE LLC

Owned by: KOCH INC.

Copper compounds released to air

2 lbs

LBS

Nearby Pollution Sources (< 20 miles)

Eagle Grove, IA (50533) 16.6 mi away

Heavy Industrial Activity

415,883.00 lbs

Annual Emissions
Fort Dodge, IA (50501) 7.4 mi away

Heavy Industrial Activity

80,797.30 lbs

Annual Emissions
Webster City, IA (50595) 11.9 mi away

Heavy Industrial Activity

26,145.62 lbs

Annual Emissions

Check Nearby Zip Codes

Report: 50533

😷

Protect Your Lungs

Because toxic gases and VOCs were detected in this area (likely from the Ammonia), standard filters are not enough. We strongly recommend an Activated Carbon purifier to adsorb these fumes.

View Recommended Carbon Filters →

Chemical Breakdown

Top 5 Pollutants by Weight

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