Mills County, IA

ZIP 51554

In ZIP 51554, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Silver City Water Supply meets every EPA legal limit; 9 contaminants are above health goals, led by pfhxs at 4× California Notification Level.
• Nearest Superfund site: Aidex Corp., 5.7 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Southwest Iowa Renewable Energy (51%), mostly acrolein.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 172,447 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 51554

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsF

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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