Westchester County, NY

ZIP 10540

In ZIP 10540, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Heritage Hills Water System has 3 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 5.7× California’s Public Health Goal.
• Nearest Superfund site: Katonah Municipal Well, 5.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Colors & Effects USA LLC - Peekskill Facility (39%), 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 10540

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityB
• Drinking water qualityB to F
• Pesticide useB
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsD

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

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