Hidalgo County, TX

ZIP 78599

In ZIP 78599, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Weslaco has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by pfos at 5.3× California’s Public Health Goal.
• Nearest Superfund site: Donna Reservoir and Canal System, 6.7 miles away.
• Largest share of modeled toxic air from industry: Ge Engine Services Mcallen LP (97%), mostly cobalt.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 764,635 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78599

• Superfund sites nearbyA to D
• Factories and industrial sitesB to D
• Oil and gas wellsD to F
• Parks and nature nearbyC to F
• Air qualityD to F
• Drinking water qualityC to D
• Pesticide useC to F
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsB

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

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