Westchester County, NY

ZIP 10504

In ZIP 10504, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: North Castle Water District #4 meets every EPA legal limit; 9 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 43× California’s Public Health Goal.
• Nearest Superfund site: Katonah Municipal Well, 7.1 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Colors & Effects USA LLC - Peekskill Facility (51%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.1 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 10504

• Superfund sites nearbyA to D
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA to B
• Drinking water qualityC to D
• Pesticide useB to C
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to B

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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