St. John the Baptist Parish, LA

ZIP 70084

In ZIP 70084, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: St John Water District 2 meets every EPA legal limit; 16 contaminants are above health goals, led by pfos at 3.3× 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: Denka Performance Elastomer LLC (67%), mostly chloroprene.
• Fine particles (PM2.5) average 8.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 17,275 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70084

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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