Calhoun County, FL

ZIP 32421

In ZIP 32421, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Altha, Town Of Water System meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 754× California’s Public Health Goal.
• Closer to Superfund sites than 55% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Enviva Pellets LLC Cottondale Plant (79%), mostly formaldehyde.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 60,239 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 32421

• Superfund sites nearbyA to C
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityB
• Drinking water qualityB to C
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsA to C
• Noise levelsA
• Radiation signalsA to B

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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