Marion County, IN

ZIP 46228

In ZIP 46228, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Citizens Water - Indianapolis meets every EPA legal limit; 13 contaminants are above health goals, led by arsenic at 245× California’s Public Health Goal.
• Nearest Superfund site: Keystone Corridor Ground Water Contamination, 3.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Linde Advanced Material Technologies Inc (57%), mostly cobalt compounds.
• Fine particles (PM2.5) average 8.8 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 46228

• Superfund sites nearbyD
• Factories and industrial sitesD to F
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityF
• Drinking water qualityC
• Pesticide useA to C
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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