Dimmit County, TX

ZIP 78834

In ZIP 78834, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Catarina Wsc meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 863× California’s Public Health Goal.
• Nearest Superfund site: Crystal City Airport, 6.5 miles away.
• Largest share of modeled toxic air from industry: Brasada Gas Plant (99%), mostly benzene.
• 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 78834

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsD to F
• Parks and nature nearbyC
• 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
• Radiation signalsB

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

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