Jefferson Davis County, MS

ZIP 39421

In ZIP 39421, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mt Gilead-Improve Water Assn meets every EPA legal limit; 5 contaminants are above health goals, led by lead at 14× California’s Public Health Goal.
• Nearest Superfund site: Newsom Brothers/old Reichhold Chemicals, Inc., 6.0 miles away.
• Largest share of modeled toxic air from industry: Georgia-Pacific Monticello Ll C (46%), mostly chromium.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 13,406 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 39421

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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