Knox County, IN

ZIP 47557

In ZIP 47557, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wheatland Water Works meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 300× California’s Public Health Goal.
• Closer to Superfund sites than 56% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Toyota Motor Manufacturing Indiana Inc (35%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 353,362 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 47557

• Superfund sites nearbyC
• Factories and industrial sitesC
• Oil and gas wellsD
• Parks and nature nearbyC
• Air qualityC
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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