Galveston County, TX

ZIP 77539

In ZIP 77539, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rain River Estates meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 59× California’s Public Health Goal.
• Nearest Superfund site: Tex-Tin Corp., 6.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Dixie Chemical Co Inc (36%), 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 11,820 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77539

• Superfund sites nearbyA to F
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyB to D
• Air qualityC to F
• Drinking water qualityC
• Pesticide useB to C
• Neighborhood health statusA to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to C
• Radiation signalsA to B

Based on 20 census tracts · compiled October 25, 2026 · how each grade works and its sources

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