Louisville, Kentucky, scores a 78.67 from the AAFA. Louisville is worse than average on both pollen levels and the amount of patients utilizing their medication. Louisville scores better than average on the numbers of allergists to patients.
The largest city in Kentucky is often in the top 10 on this list. Why? Blame their famous bluegrass. It gives off more pollen than any other type of grass. Other factors that can make allergies in this area worse: its location next to the Ohio River, the bowl-like shape of the Ohio Valley and the humidity that gets trapped there in warmer months.