Johnston County, NC

ZIP 27555

In ZIP 27555, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Micro, Town Of has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by pfos at 7× California’s Public Health Goal.
• Closer to Superfund sites than 59% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Mallinckrodt Pharmaceuticals (46%), mostly nitrobenzene.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 519,890 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 27555

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityB
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsB

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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