Bexar County, TX

ZIP 78230

In ZIP 78230, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Saws Castle Hills has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by pfos at 4× California’s Public Health Goal.
• Nearest Superfund site: Bandera Road Ground Water Plume, 5.7 miles away.
• Largest share of modeled toxic air from industry: Calaveras Power Station (45%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.8 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 78230

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

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

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