Linn County, IA

ZIP 52404

In ZIP 52404, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Gaddis Estates Hoa meets every EPA legal limit; 1 contaminant is above health goals, led by lead at 34× California’s Public Health Goal.
• Nearest Superfund site: Electro-Coatings, Inc., 5.1 miles away.
• Largest share of modeled toxic air from industry: Adm Corn Processing (52%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 294,543 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 52404

• Superfund sites nearbyA
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityB to C
• Drinking water qualityA to F
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to D
• Radiation signalsD to F

Based on 16 census tracts · compiled September 10, 2026 · how each grade works and its sources

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