St. Charles Parish, LA

ZIP 70057

In ZIP 70057, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: St Charles Parish Dept Of Waterworks meets every EPA legal limit; 11 contaminants are above health goals, led by bromodichloromethane at 244× 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 (48%), 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 70057

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

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

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