Nassau County, NY

ZIP 11550

In ZIP 11550, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Liberty Utilities New York - Lynbrook has 1 contaminant at or over an EPA legal limit; 18 contaminants are above health goals, led by pfos at 5.1× California’s Public Health Goal.
• Nearest Superfund site: Pasley Solvents & Chemicals, Inc., 3.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Oerlikon Metco (US) Inc (76%), mostly chromium.
• Fine particles (PM2.5) average 8.2 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 11550

• Superfund sites nearbyF
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityD
• Drinking water qualityD to F
• Pesticide useA to B
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsB

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…