Nassau County, NY

ZIP 11558

In ZIP 11558, 5 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: Peninsula Boulevard Groundwater Plume, 3.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Eto Sterilization (61%), mostly ethylene oxide.
• 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 11558

• Superfund sites nearbyD
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityC to D
• Drinking water qualityF
• Pesticide useA
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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