Harris County, TX

ZIP 77071

In ZIP 77071, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Southwest Harris County Mud 1 meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 157× California’s Public Health Goal.
• Nearest Superfund site: Crystal Chemical Co., 5.9 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (38%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 38,374 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77071

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

Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources

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