Largest U.S. Cities Most at Risk for Grass Allergies This Summer
A closer look at how the country’s biggest population centers stack up in our 2025 grass allergy risk ranking: - Washington, DC: 6th
- Philadelphia: 12th
- San Francisco: 63rd
- Nashville: 70th
- Chicago: 81st
- San Antonio: 82nd
- Columbus, OH: 115th
- Dallas: 121st
- Houston: 141st
- San Diego: 156th
Key Insights: Chicago (No. 81) and Philadelphia (No. 12) each contend with 15 significant grass allergens, triple the count in San Antonio (No. 82) and nearly four times that of Fort Worth (No. 210), with 4. 16 of the 25 most populous U.S. cities landed in the top half of the ranking, but Boston (No. 471) stood out at the other end, finishing in the bottom 10 with 0 measurable grass allergens. Among the 25 largest cities, Boston (No. 471) and Denver (No. 421) have the highest average summer wind speeds, a major pollen spreader, while Dallas (No. 121) and Nashville (No. 73) lead in summer mowing frequency.
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