Suffolk County, NY
ZIP 11751
In ZIP 11751, 5 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: Long Island Sterilization (46%), 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 11751
- Superfund sites nearbyD to F
- Factories and industrial sitesB to C
- Oil and gas wellsA
- Parks and nature nearbyD to F
- Air qualityB to C
- Drinking water qualityF
- Pesticide useC to F
- Neighborhood health statusB to C
- Past wildfire impactsA
- Past flood impactsC
- Noise levelsA to D
Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources
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