Harris County, TX

ZIP 77020

In ZIP 77020, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Houston meets every EPA legal limit; 23 contaminants are above health goals, led by lead at 26× California’s Public Health Goal.
• Nearest Superfund site: Many Diversified Interests, Inc., 1.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (34%), 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 77020

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

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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