Durham County, NC

ZIP 27503

In ZIP 27503, 1 of the 12 things we check have at least one part graded D or F.

• Drinking water: Fox Run S/D meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 60× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Mallinckrodt Pharmaceuticals (33%), mostly nitrobenzene.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 11,900 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 27503

• Superfund sites nearbyA
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA to B
• Drinking water qualityD to F
• Pesticide useC
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsC

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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