Harris County, TX

ZIP 77336

In ZIP 77336, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Houston Ud 5 - Kingwood meets every EPA legal limit; 13 contaminants are above health goals, led by lead at 97× California’s Public Health Goal.
• Closer to Superfund sites than 58% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (24%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.4 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 77336

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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