Bexar County, TX

ZIP 78212

In ZIP 78212, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Saws Castle Hills meets every EPA legal limit; 8 contaminants are above health goals, led by pfos at 2.3× California’s Public Health Goal.
• Nearest Superfund site: R & H Oil/tropicana Energy, 5.6 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Calaveras Power Station (40%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.8 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 78212

• Superfund sites nearbyA to D
• Factories and industrial sitesB to F
• Oil and gas wellsA to B
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityB to C
• Pesticide useB to C
• Neighborhood health statusA to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB

Based on 17 census tracts · compiled October 25, 2026 · how each grade works and its sources

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