St. Tammany Parish, LA

ZIP 70447

In ZIP 70447, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Magnolia-Pruden Creek meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 57× California’s Public Health Goal.
• Nearest Superfund site: Madisonville Creosote Works, 1.0 miles away.
• Largest share of modeled toxic air from industry: International Paper Bogalusa Mill (93%), mostly formaldehyde.
• Fine particles (PM2.5) average 7.6 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 70447

• Superfund sites nearbyD to F
• Factories and industrial sitesC to D
• Oil and gas wellsA to B
• Parks and nature nearbyC to D
• Air qualityB to C
• Drinking water qualityC to F
• Pesticide useB to D
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsB

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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