Willacy County, TX

ZIP 78569

In ZIP 78569, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sebastian Mud meets every EPA legal limit; 10 contaminants are above health goals, led by lithium at 5.5× the USGS health-based screening level.
• 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: Bluewing One LLC (68%), mostly benzene.
• Fine particles (PM2.5) average 7.6 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 78569

• Superfund sites nearbyA
• Factories and industrial sitesA to C
• Oil and gas wellsB to D
• Parks and nature nearbyC to F
• Air qualityC
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to F
• Radiation signalsB

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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