Suffolk County, NY
ZIP 11780
In ZIP 11780, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: St James Water District has 1 contaminant at or over an EPA legal limit; 2 contaminants are above health goals, led by pfos at 3.1× California’s Public Health Goal.
- Nearest Superfund site: Islip Municipal Sanitary Landfill, 2.2 miles away (3 within 10 miles).
- Largest share of modeled toxic air from industry: Long Island Sterilization (50%), mostly ethylene oxide.
- Fine particles (PM2.5) average 6.8 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 11780
- Superfund sites nearbyD 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 D
- Pesticide useB to D
- Neighborhood health statusA to D
- Past wildfire impactsA
- Past flood impactsC to D
- Noise levelsA to D
Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources
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