Westchester County, NY

ZIP 10506

In ZIP 10506, 1 of the 12 things we check have at least one part graded D or F.

• Drinking water: Old Post Road Water District meets every EPA legal limit; 5 contaminants are above health goals, led by dibromochloromethane at 97× California’s Public Health Goal.
• Nearest Superfund site: Katonah Municipal Well, 3.7 miles away.
• Largest share of modeled toxic air from industry: Colors & Effects USA LLC - Peekskill Facility (45%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.7 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 10506

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to B
• Drinking water qualityB to C
• Pesticide useA to B
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsD

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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