Smith County, TX

ZIP 75703

In ZIP 75703, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Lakeway Harbor Subdivision meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 233× 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: Century Industrial Coatings I Nc. (59%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 28,327 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 75703

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

Based on 19 census tracts · compiled October 25, 2026 · how each grade works and its sources

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