Ascension Parish, LA

ZIP 70346

In ZIP 70346, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Parish Utilities Of Ascension has 1 contaminant at or over an EPA legal limit; 17 contaminants are above health goals, led by pfos at 4.5× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Basf Corp (47%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 106,693 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70346

• Superfund sites nearbyA
• Factories and industrial sitesD to F
• Oil and gas wellsD to F
• Parks and nature nearbyD
• Air qualityD
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC

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

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