Westchester County, NY

ZIP 10503

In ZIP 10503, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Tarrytown Water Supply meets every EPA legal limit; 6 contaminants are above health goals, led by chloroform at 90× California’s Public Health Goal.
• Closer to Superfund sites than 95% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Zimmer Biomet (40%), mostly cobalt.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 5,510 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 10503

• Superfund sites nearbyF
• Factories and industrial sitesC
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityC
• Drinking water qualityC
• Pesticide useB
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsD
• Noise levelsA

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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