Nassau County, NY

ZIP 11771

In ZIP 11771, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Jericho Wd has 1 contaminant at or over an EPA legal limit; 14 contaminants are above health goals, led by trichloroethylene at 3.7× California’s Public Health Goal.
• Nearest Superfund site: Syosset Landfill, 3.6 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Oerlikon Metco (US) Inc (75%), mostly chromium.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 348 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 11771

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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