Harrison County, MS

ZIP 39501

In ZIP 39501, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Naval Construction Battal Ctr meets every EPA legal limit; 9 contaminants are above health goals, led by arsenic at 98× California’s Public Health Goal.
• Nearest Superfund site: Chemfax, Inc., 1.3 miles away.
• Largest share of modeled toxic air from industry: Gulf Ship LLC (49%), mostly chromium.
• Fine particles (PM2.5) average 7.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 12,341 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 39501

• Superfund sites nearbyD to F
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityC
• Drinking water qualityB to C
• Pesticide useB to D
• Neighborhood health statusA to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to F

Based on 13 census tracts · compiled October 25, 2026 · how each grade works and its sources

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