St. Charles Parish, LA

ZIP 70031

In ZIP 70031, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: E Jefferson Ww District 1 meets every EPA legal limit; 12 contaminants are above health goals, led by arsenic at 305× 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: St Charles Operations (Taft/Star) Union Carbide Corp (38%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,335 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70031

• Superfund sites nearbyA
• Factories and industrial sitesF
• Oil and gas wellsC
• Parks and nature nearbyB
• Air qualityD
• Drinking water qualityC
• Pesticide useC
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsA

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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