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10. Greenville, South Carolina

Image: Kevin Ruck
Image: Kevin Ruck (Shutterstock)

Greenville is ranked on the list for having average overall pollen levels, receiving a 79.43-point ranking, the study reported.

Grass and weed pollen is a top component here and a worse-than-average rate for the amount of medicine used and an average ranking for the number of people who ultimately need to seek specialist care.