Brazoria County, TX

ZIP 77517

In ZIP 77517, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of League City has 1 contaminant at or over an EPA legal limit; 15 contaminants are above health goals, led by pfos at 4.4× 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: Ascend Performance Materials-Chocolate Bayou Plant (20%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 126,183 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 77517

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…