Houston tree pollen remains high while grass, weed, and mold decline

Tree total: 156 (6 more than April 22, 2024), with a day over day change of 4%.

• Grass total: 30 (-42 from April 22, 2024), a day over day change of -58%.

• Weed total: 14 (-18 from April 22, 2024), a day over day change of -56%.

• Tree, weed, grass pollen total: 200 (-54 from April 22, 2024), a day over day change of -21%.

• Mold total: 7861 (-2536 from April 22, 2024), a day over day change of -24%.

Tree species breakdown:

• Acer (Maple): 0

• Alnus (Alder): 0

• Betula (Birch): 0

• Carya (Hickory/Pecan): 38 (-6 from April 22, 2024), a day over day change of -14%.

• Celtis (Hackberry): 0

• Corylus (Hazelnut): 0

• Cupressaceae (Cedar): 2

• Fraxinus (Ash): 12 (-2 from April 22, 2024), a day over day change of -14%.

• Juglans (Walnut): 4 (-4 from April 22, 2024), a day over day change of -100%.

• Liquidambar (Sweet Gum): 0

• Morus (Mulberry): 16 (8 more than April 22, 2024), a day over day change of 100%.

• Pinaceae (Pine): 8 (6 more than April 22, 2024), a day over day change of 300%.

• Platanus (Sycamore): 0

• Populus (Cottonwood): 4 (2 more than April 22, 2024), a day over day change of 100%.

• Quercus (Oak): 56 (14 more than April 22, 2024), a day over day change of 33%.

• Salix (Willow): 2 (no change)

• Tilia (Linden): 0

• Ulmus (Elm): 0

• Other Tree: 18 (8 more than April 22, 2024), a day over day change of 80%.

Weed species breakdown:

• Ambrosia (Ragweed): 0

• Artemisia (Sage): 0

• Asteraceae (Aster): 0

• Cyperaceae (Sedge): 4 (no change)

• Plantago (Plantain): 6 (no change)

• Rumex (Sheep Sorel): 2 (-12 from April 22, 2024), a day over day change of -86%.

• Typha (Cattail): 0

• Urticaceae (Nettle): 0

• Chenopodiaceae/ Amaranthaceae (Amaranth): 2

• Other Weed: 0 (-8 from April 22, 2024), a day over day change of -100%.