Harris County, TX

ZIP 77077

In ZIP 77077, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Harris County Mud 372 meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 14× California’s Public Health Goal.
• Nearest Superfund site: Crystal Chemical Co., 1.3 miles away.
• Largest share of modeled toxic air from industry: Nov Rig Systems West Little York (22%), mostly chromium.
• 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 77077

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

Based on 25 census tracts · compiled September 10, 2026 · how each grade works and its sources

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