Brazoria County, TX

ZIP 77486

In ZIP 77486, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Twin Lakes Club meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 983× 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: Dow Chemical Co Freeport Facility (34%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 126,183 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77486

• Superfund sites nearbyA
• Factories and industrial sitesD
• Oil and gas wellsD
• Parks and nature nearbyC
• Air qualityB to C
• Drinking water qualityA to C
• Pesticide useD
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsB

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

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