Galveston County, TX

ZIP 77546

In ZIP 77546, 7 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: Dixie Oil Processors, Inc., 0.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Dixie Chemical Co Inc (40%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 11,820 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77546

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

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

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