Westchester County, NY
ZIP 10504
In ZIP 10504, 1 of the 12 things we check have at least one part graded D or F.
- Drinking water: North Castle Water District #5 meets every EPA legal limit; 5 contaminants are above health goals, led by bromodichloromethane at 70× 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 sitesA to B
- 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 to B
Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources
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