Ascension Parish, LA

ZIP 70734

In ZIP 70734, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Gonzales Water System meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 63× California’s Public Health Goal.
• Nearest Superfund site: Dutchtown Treatment Plant, 2.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Basf Corp (70%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 44,318 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70734

• Superfund sites nearbyA
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyC to D
• Air qualityD to F
• Drinking water qualityC to F
• Pesticide useD to F
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsB to C

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

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