Harrison County, MS

ZIP 39507

In ZIP 39507, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Keesler Air Force Base has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 7.7× California’s Public Health Goal.
• Nearest Superfund site: Chemfax, Inc., 1.3 miles away.
• Largest share of modeled toxic air from industry: Channel Chemical Corp (46%), 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 39507

• Superfund sites nearbyD to F
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityC
• Drinking water qualityC to F
• Pesticide useC to D
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to F

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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