Pollen Forecast for Potrero, California
High
Ash, Mulberry, Alder
Discussion
Concentration of pollen grains in the air for Friday will be on the increase and extend further into the very high range. This is likely to be caused in part by higher temperatures and the lower dewpoint.
Allergy Facts
The box elder tree is the most allergenic of the maple family. It is commonly found in the Midwest.