Harris County, TX

ZIP 77389

In ZIP 77389, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Timbercrest Village meets every EPA legal limit; 2 contaminants are above health goals, led by lead at 79× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Huntsman Petrochemical LLC (40%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.9 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 77389

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

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

Loading the full report, with every source…