Zavala County, TX

ZIP 78839

In ZIP 78839, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Carrizo Springs meets every EPA legal limit; 8 contaminants are above health goals, led by bromoform at 4.7× 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 nearbyB to C
• Air qualityB to C
• Drinking water qualityB to C
• Pesticide useD to F
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to B
• Radiation signalsB

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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