Putnam County, NY

ZIP 10509

In ZIP 10509, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hillcrest Water District has 3 contaminants at or over an EPA legal limit; 11 contaminants are above health goals, led by arsenic at 250× California’s Public Health Goal.
• Nearest Superfund site: Brewster Well Field, 1.6 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Colors & Effects USA LLC - Peekskill Facility (45%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,404 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 10509

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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