Harris County, TX

ZIP 77090

In ZIP 77090, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: North Forest Mud meets every EPA legal limit; 7 contaminants are above health goals, led by arsenic at 663× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Lyondell Chemical Co (25%), mostly ethylene oxide.
• 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 77090

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

Based on 17 census tracts · compiled October 25, 2026 · how each grade works and its sources

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