Nassau County, NY

ZIP 11003

In ZIP 11003, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wa Of Western Nassau has 3 contaminants at or over an EPA legal limit; 28 contaminants are above health goals, led by pfos at 6× California’s Public Health Goal.
• Nearest Superfund site: Genzale Plating Co., 2.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Eto Sterilization (56%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.5 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 11003

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

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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