Suffolk County, NY
ZIP 11706
In ZIP 11706, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: Suffolk County Water Authority has 2 contaminants at or over an EPA legal limit; 17 contaminants are above health goals, led by pfos at 6.2× California’s Public Health Goal.
- Nearest Superfund site: Mackenzie Chemical Works, 3.8 miles away (3 within 10 miles).
- Largest share of modeled toxic air from industry: Oerlikon Metco (US) Inc (41%), mostly ethylene oxide.
- Fine particles (PM2.5) average 7.5 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 11706
- Superfund sites nearbyC to F
- Factories and industrial sitesB to C
- Oil and gas wellsA
- Parks and nature nearbyC to F
- Air qualityA to C
- Drinking water qualityA to F
- Pesticide useC to F
- Neighborhood health statusB to D
- Past wildfire impactsA
- Past flood impactsC
- Noise levelsA to D
Based on 23 census tracts · compiled September 10, 2026 · how each grade works and its sources
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