Delaware County, OH

ZIP 43240

In ZIP 43240, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Columbus Public Water System meets every EPA legal limit; 13 contaminants are above health goals, led by pfoa at 329× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Mills Metal Finishing (85%), mostly chromium.
• Fine particles (PM2.5) average 9.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 133,342 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 43240

• Superfund sites nearbyA
• Factories and industrial sitesC
• Oil and gas wellsB
• Parks and nature nearbyB
• Air qualityF
• Drinking water qualityC
• Pesticide useC
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsC to D

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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