Gwinnett County, GA

ZIP 30078

In ZIP 30078, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Walton Co. Water & Sewer Auth. meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 31× 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: Becton Dickinson & Co Covington Operations (73%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 5,543 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 30078

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityC to D
• Drinking water qualityF
• Pesticide useB to C
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to C
• Radiation signalsD

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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