Willacy County, TX

ZIP 78594

In ZIP 78594, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: North Alamo Wsc meets every EPA legal limit; 21 contaminants are above health goals, led by lead at 55× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Titan Fuel Terminals Harlingen LLC (49%), mostly benzene.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 179,684 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 78594

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsB
• Parks and nature nearbyD
• Air qualityC
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsF
• Radiation signalsC

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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