Harris County, TX

ZIP 77089

In ZIP 77089, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Clear Brook City Mud has 1 contaminant at or over an EPA legal limit; 16 contaminants are above health goals, led by pfos at 4.3× California’s Public Health Goal.
• Nearest Superfund site: Brio Refining, Inc., 0.8 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Equistar Chemicals Bayport Chemicals Plant (42%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.8 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 77089

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

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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