Suffolk County, NY

ZIP 11956

In ZIP 11956, none of the 12 things we check has a 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: North Sea Municipal Landfill, 6.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: United Riverhead Terminal Inc (60%), mostly benzene.
• Fine particles (PM2.5) average 5.4 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 11956

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC
• Pesticide useC
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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