St. Landry Parish, LA

ZIP 71356

In ZIP 71356, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Town Of Washington Water System meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 100× 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: Alon Refining Krotz Springs Inc (40%), mostly chromium.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 253,365 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 71356

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsC to D
• Parks and nature nearbyC to D
• Air qualityC
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsB

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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