St. Helena Parish, LA

ZIP 70453

In ZIP 70453, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wwks District 2 Of St Helena meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 97× 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 (42%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 8,695 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70453

• Superfund sites nearbyA
• Factories and industrial sitesB to D
• Oil and gas wellsC to D
• Parks and nature nearbyC
• Air qualityC
• Drinking water qualityB to C
• Pesticide useB to D
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsA

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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