Suffolk County, NY
ZIP 11731
In ZIP 11731, 3 of the 12 things we check have at least one part graded D or F.
- Drinking water: Suffolk County Water Authority meets every EPA legal limit; 2 contaminants are above health goals, led by pfos at 2.1× California’s Public Health Goal.
- Nearest Superfund site: Computer Circuits, 3.1 miles away (3 within 10 miles).
- Largest share of modeled toxic air from industry: Oerlikon Metco (US) Inc (52%), mostly ethylene oxide.
- Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 167,580 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 11731
- Superfund sites nearbyC to F
- Factories and industrial sitesB to C
- Oil and gas wellsA
- Parks and nature nearbyB to C
- Air qualityA to B
- Drinking water qualityA to C
- Pesticide useB to D
- Neighborhood health statusA to B
- Past wildfire impactsA
- Past flood impactsC
- Noise levelsA to D
Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources
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