St. Tammany Parish, LA

ZIP 70471

In ZIP 70471, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Pearl Plantation Townhse meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 450× California’s Public Health Goal.
• Nearest Superfund site: Madisonville Creosote Works, 5.5 miles away.
• Largest share of modeled toxic air from industry: International Paper Bogalusa Mill (68%), 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 70471

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

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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