Harris County, TX
ZIP 77077
In ZIP 77077, 7 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 bromodichloromethane at 117× California’s Public Health Goal.
- Nearest Superfund site: Crystal Chemical Co., 1.3 miles away.
- Largest share of modeled toxic air from industry: Lyondell Chemical Co (21%), 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 to F
- Oil and gas wellsD to F
- Parks and nature nearbyA to D
- Air qualityD to F
- Drinking water qualityC
- Pesticide useA to C
- Neighborhood health statusA to D
- Past wildfire impactsA
- Past flood impactsC to D
- Noise levelsA to C
- Radiation signalsA to C
Based on 25 census tracts · compiled October 25, 2026 · how each grade works and its sources
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