10 Worst U.S. Cities For Allergies

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1. Dallas

Allergen Sensitization Index – 697

If you are someone with allergies, Dallas might be the place to avoid. It is the top city for mold sensitization and also among the top 5 for ragweed pollen allergies. With allergy sensitization rate touching a 697, Dallas is by far the worst major city for allergies. 

See also 20 cities with the best air quality in the U.S. and 10 states with the highest asthma rates in the U.S.

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