Hidalgo County, TX

ZIP 78501

In ZIP 78501, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sharyland Wsc meets every EPA legal limit; 14 contaminants are above health goals, led by pfos at 3.7× California’s Public Health Goal.
• Nearest Superfund site: Donna Reservoir and Canal System, 8.9 miles away.
• Largest share of modeled toxic air from industry: Ge Engine Services Mcallen LP (100%), mostly cobalt.
• Fine particles (PM2.5) average 10.5 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 78501

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

Based on 23 census tracts · compiled October 25, 2026 · how each grade works and its sources

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