10 Worst U.S. Cities For Allergies

2. Phoenix

Allergen Sensitization Index – 695

Phoenix is overall not a good place to be in if you are suffering from allergies. It is by far the worst city for ragweed pollen allergies. Abundance of other desert plants too can aggravate pollen allergies. While mesquite landscaping is a popular choice, you might not be a fan if you are a person with allergies. 

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