Westchester County, NY

ZIP 10550

In ZIP 10550, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: New York City System meets every EPA legal limit; 9 contaminants are above health goals, led by chloroform at 86× California’s Public Health Goal.
• Nearest Superfund site: Mattiace Petrochemical Co., Inc., 9.9 miles away.
• Largest share of modeled toxic air from industry: Eto Sterilization (57%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.1 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 10550

• Superfund sites nearbyD
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityD
• Drinking water qualityC
• Pesticide useB
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to D
• Radiation signalsC

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

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