The 25 Worst Cities for People With Spring Allergies

20. Jacksonville, FL
> Fine particulate matter pollution 24-hr average: 18 µg/m3 (EPA standard: 35 µg/m3)
> Avg. nitrogen dioxide concentration: 10 ppb (EPA standard: 53 ppb)
> Total population: 1,533,796
> Fall 2022 allergy ranking: #26 out of 100

19. Miami, FL
> Fine particulate matter pollution 24-hr average: 21 µg/m3 (EPA standard: 35 µg/m3)
> Avg. nitrogen dioxide concentration: 13 ppb (EPA standard: 53 ppb)
> Total population: 6,129,858
> Fall 2022 allergy ranking: #18 out of 100

18. Allentown, PA
> Fine particulate matter pollution 24-hr average: 18 µg/m3 (EPA standard: 35 µg/m3)
> Avg. nitrogen dioxide concentration: 10 ppb (EPA standard: 53 ppb)
> Total population: 841,265
> Fall 2022 allergy ranking: #30 out of 100

17. Memphis, TN
> Fine particulate matter pollution 24-hr average: 20 µg/m3 (EPA standard: 35 µg/m3)
> Avg. nitrogen dioxide concentration: 10 ppb (EPA standard: 53 ppb)
> Total population: 1,343,150
> Fall 2022 allergy ranking: #19 out of 100

16. Des Moines, IA
> Fine particulate matter pollution 24-hr average: 17 µg/m3 (EPA standard: 35 µg/m3)
> Avg. nitrogen dioxide concentration: 6 ppb (EPA standard: 53 ppb)
> Total population: 690,585
> Fall 2022 allergy ranking: #17 out of 100