Iredell County, NC

ZIP 28634

In ZIP 28634, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mocksville, Town Of meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 143× California’s Public Health Goal.
• Nearest Superfund site: Holcomb Creosote Co, 5.5 miles away.
• Largest share of modeled toxic air from industry: U.S. Chemical Storage LLC (77%), mostly chromium.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 88,871 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 28634

• Superfund sites nearbyA to D
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityB
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsB to D

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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