Saint Louis County Department of Health - Pollen and Mold Center Pollen and Mold Center. Saint Louis County, Missouri: Aeroallergen Reports Saturday Sunday 11 10 9 8 7 6 5 4 3 2 1 0 Mold Count: 6653 (Moderate) Thu, 13 Jun 2024 08:30:39 http://pollenandmold.stlouisco.com/Default.aspx http://pollenandmold.stlouisco.com/Default.aspx Air Quality for 6/13/2024: Yellow