Harris County, TX

ZIP 77091

In ZIP 77091, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sunbelt Fwsd Woodland Oaks Subdivision meets every EPA legal limit; 12 contaminants are above health goals, led by lead at 10× California’s Public Health Goal.
• Nearest Superfund site: North Cavalcade Street, 3.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (33%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.1 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 77091

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

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

Loading the full report, with every source…