Allen County, IN

ZIP 46818

In ZIP 46818, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Columbia City Water Department meets every EPA legal limit; 6 contaminants are above health goals, led by lead at 96× California’s Public Health Goal.
• Nearest Superfund site: Wayne Waste Oil, 3.8 miles away.
• Largest share of modeled toxic air from industry: Pyromation Inc (98%), mostly diisocyanates.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 148,998 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 46818

• Superfund sites nearbyA to D
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityC to F
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD to F

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

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