Pollen Alerts For Calverton, MD

Pollen Index: 10.1 Pollen Level: high Predominant Pollen: Maple, Birch and Willow. Concentration of pollen grains in the air for Thursday will be falling in the moderate range. This forecast of lower pollen concentration is based on falling temperatures, rising humidity, and heavy rains in the morning and evening which tend to wash pollen out of the air. That's good news for allergy sufferers.