Worst County for Fall Allergies in Every State

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Source: nakrnsm / Flickr

41. Texas: Harris County
> County seat: Houston
> Est. adults with asthma: 245,241
> Average fine particle concentration: 12.0 µg/m3 (1st of 254 TX counties)
> Population living in urban area: 98.8% (2nd of 254 TX counties)

Source: Chanilim714 / Wikimedia Commons

42. Utah: Salt Lake County
> County seat: Salt Lake City
> Est. adults with asthma: 70,471
> Average fine particle concentration: 8.4 µg/m3 (1st of 29 UT counties)
> Population living in urban area: 99.1% (1st of 29 UT counties)

Source: Redjar. / Wikimedia Commons

43. Vermont: Bennington County
> County seat: Bennington & Manchester
> Est. adults with asthma: 3,232
> Average fine particle concentration: 7.7 µg/m3 (4th of 14 VT counties)
> Population living in urban area: 35.5% (4th of 14 VT counties)

Source: Sean Pavone / iStock

44. Virginia: Arlington County
> County seat: Arlington
> Est. adults with asthma: 14,816
> Average fine particle concentration: 9.7 µg/m3 (6th of 133 VA counties)
> Population living in urban area: 100.0% (1st of 133 VA counties)

Source: Thinkstock

45. Washington: King County
> County seat: Seattle
> Est. adults with asthma: 154,630
> Average fine particle concentration: 7.5 µg/m3 (16th of 39 WA counties)
> Population living in urban area: 96.8% (1st of 39 WA counties)