Bexar County, TX

ZIP 78236

In ZIP 78236, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Jbsa Medina has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by arsenic at 3,819× California’s Public Health Goal.
• Nearest Superfund site: R & H Oil/tropicana Energy, 5.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Arvin Sango (69%), mostly chromium.
• Fine particles (PM2.5) average 9.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 58,581 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78236

• Superfund sites nearbyA to D
• Factories and industrial sitesB to C
• Oil and gas wellsD
• Parks and nature nearbyC to F
• Air qualityC to F
• Drinking water qualityD to F
• Pesticide useC to D
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsC

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…