St. Mary Parish, LA

ZIP 70522

In ZIP 70522, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: St Mary Water & Sewer Comm #3 meets every EPA legal limit; 17 contaminants are above health goals, led by pfos at 2.4× 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: Cabot Corp Canal Plant (76%), mostly hydrogen sulfide.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 128,132 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 70522

• Superfund sites nearbyA
• Factories and industrial sitesB
• Oil and gas wellsD
• Parks and nature nearbyB
• Air qualityC
• Drinking water qualityF
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsB

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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