Fort Bend County, TX

ZIP 77478

In ZIP 77478, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Houston meets every EPA legal limit; 15 contaminants are above health goals, led by arsenic at 878× California’s Public Health Goal.
• Nearest Superfund site: Crystal Chemical Co., 5.9 miles away.
• Largest share of modeled toxic air from industry: Nouryon Surface Chemistry LLC (25%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 179,768 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77478

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

Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources

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