Nassau County, NY

ZIP 11548

In ZIP 11548, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Port Washington Wd has 2 contaminants at or over an EPA legal limit; 15 contaminants are above health goals, led by pfoa at 357× California’s Public Health Goal.
• Nearest Superfund site: Applied Environmental Services, 3.0 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 7.5 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 11548

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

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

Loading the full report, with every source…