Pollen Alerts For Ottawa, IA

Pollen Index: 11.7 Pollen Level: high Predominant Pollen: Elm, Poplar/Aspen/Cottonwood and Maple. The pollen levels for Saturday will be falling but stay in the extremely high range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to falling temperatures and expected precipitation in the morning and evening which tends to wash pollen out of the air.