Fort Bend County, TX

ZIP 77477

In ZIP 77477, 8 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., 4.1 miles away.
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (38%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.2 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 77477

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

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

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