Sick of Allergies? Avoid These 10 Cities Louisville is worst offender, says allergy group By Matt Cantor, Newser User Posted Apr 6, 2014 11:32 AM CDT 9 comments Comments Louisville, Kentucky, is the worst US city for those with spring allergies. (Shutterstock) (Newser) – Allergy experts have unveiled the worst cities in the US for those with spring allergies, and Louisville, Ky., is the place you most want to avoid if you're an allergy sufferer. It moves up from No. 5 last year to the top spot this year. "The river provides a basin effect that traps allergens … plus the temperate climate and precipitation encourages plenty of pollen growth for patients out here," a local allergist tells Today. Factors assessed in the list include the amount of pollen and mold in the air, the number of allergy meds used per patient, and the number of allergy specialists per patient, the Asthma and Allergy Foundation of America notes. The top 10: Louisville, Ky. Memphis, Tenn. Baton Rouge, La. Oklahoma City, Okla. Jackson, Miss. Chattanooga, Tenn. Dallas, Texas Richmond, Va. Birmingham, Ala. McAllen, Texas Click for the complete list, or find out why this year's allergy season may be particularly bad.