Harris County, TX

ZIP 77039

In ZIP 77039, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Boulais Mobile Home Park meets every EPA legal limit; 1 contaminant is above health goals, led by arsenic at 488× California’s Public Health Goal.
• Nearest Superfund site: North Cavalcade Street, 6.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (25%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.4 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 77039

• Superfund sites nearbyA to D
• Factories and industrial sitesF
• Oil and gas wellsD
• Parks and nature nearbyB to D
• Air qualityF
• Drinking water qualityA to C
• Pesticide useA to C
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to C
• Radiation signalsA

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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