Harris County, TX

ZIP 77040

In ZIP 77040, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Maple Leaf Mobile Home Subdivision meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 32× California’s Public Health Goal.
• Nearest Superfund site: Jones Road Ground Water Plume, 4.0 miles away.
• Largest share of modeled toxic air from industry: Blp Holdings (68%), mostly chromium.
• Fine particles (PM2.5) average 8.7 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 77040

• Superfund sites nearbyA to D
• Factories and industrial sitesF
• Oil and gas wellsD
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityC to F
• Pesticide useB to C
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsB

Based on 17 census tracts · compiled September 10, 2026 · how each grade works and its sources

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