Harris County, TX

ZIP 77031

In ZIP 77031, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Harris County Mud 122 meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 39× 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 77031

• Superfund sites nearbyD
• Factories and industrial sitesF
• Oil and gas wellsB to D
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityD to F
• Pesticide useB to C
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsD
• Noise levelsA to C
• Radiation signalsC

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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