Harrison County, MS

ZIP 39503

In ZIP 39503, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Palmer Creek Utility Assc, Inc meets every EPA legal limit; 4 contaminants are above health goals, led by arsenic at 83× California’s Public Health Goal.
• Nearest Superfund site: Chemfax, Inc., 1.5 miles away.
• Largest share of modeled toxic air from industry: Channel Chemical Corp (43%), mostly formaldehyde.
• 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 39503

• Superfund sites nearbyA to F
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityB to C
• Drinking water qualityB to C
• Pesticide useB to D
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to F
• Radiation signalsA

Based on 22 census tracts · compiled October 25, 2026 · how each grade works and its sources

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