Zavala County, TX

ZIP 78839

In ZIP 78839, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Espantosa Water Supply meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 24× California’s Public Health Goal.
• Nearest Superfund site: Crystal City Airport, 1.6 miles away.
• Largest share of modeled toxic air from industry: US Customs Service Firing Range #Tx0156 (100%), mostly lead.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 69,060 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78839

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsD to F
• Parks and nature nearbyC
• Air qualityB to C
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to B
• Radiation signalsC

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…