Marion County, IN

ZIP 46224

In ZIP 46224, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Speedway Water Works meets every EPA legal limit; 15 contaminants are above health goals, led by pfos at 1.5× California’s Public Health Goal.
• Nearest Superfund site: Reilly Tar & Chemical Corp. (indianapolis Plant), 2.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Linde Advanced Material Technologies Inc (87%), mostly cobalt compounds.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 22,976 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 46224

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

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

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