St. Tammany Parish, LA

ZIP 70448

In ZIP 70448, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Chahta Mobile Home Park meets every EPA legal limit; 5 contaminants are above health goals, led by arsenic at 138× California’s Public Health Goal.
• Nearest Superfund site: Madisonville Creosote Works, 7.7 miles away.
• Largest share of modeled toxic air from industry: International Paper Bogalusa Mill (80%), mostly formaldehyde.
• Fine particles (PM2.5) average 7.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 4,970 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70448

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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