Nassau County, NY

ZIP 11518

In ZIP 11518, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rockville Centre (V) meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 375× California’s Public Health Goal.
• Nearest Superfund site: Peninsula Boulevard Groundwater Plume, 2.1 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 8.1 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 11518

• Superfund sites nearbyF
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityD
• Drinking water qualityC
• Pesticide useA
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsC to D

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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