Harris County, TX

ZIP 77598

In ZIP 77598, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Webster has 1 contaminant at or over an EPA legal limit; 12 contaminants are above health goals, led by pfos at 5.2× California’s Public Health Goal.
• Nearest Superfund site: Brio Refining, Inc., 2.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Dixie Chemical Co Inc (46%), mostly propyleneimine.
• Fine particles (PM2.5) average 8.9 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 77598

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

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

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