Tangipahoa Parish, LA

ZIP 70403

In ZIP 70403, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Pontchatoula Water System has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 133× California’s Public Health Goal.
• Nearest Superfund site: Delatte Metals, 4.4 miles away.
• Largest share of modeled toxic air from industry: Evonik Corp (57%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 124,831 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70403

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

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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