How is pollen counted?

As the spring season approaches we are getting ready to provide the pollen counts to the Chicagoland community. We are part of the National Allergy Bureau and our counts get reported to the local news stations and the Chicago Tribune. We also make the counts available on the top of our webpage. Many people ask, how are the pollen counts done. Check out the short video on the process. https://youtu.be/ImuomC3Zc8A