Overall Overview
Total pollen decreased by 50, falling from 162 to 112. The decline was entirely driven by a sharp drop in tree pollen.
Total mold increased by 252, reversing the prior day’s decline, led by a strong rise in Cladosporium and a new increase in Penicillium/Aspergillus.
Tree, Grass, and Weed Pollen
Tree Pollen (−70)
Largest declines:
- Quercus (Oak) −30
- Carya (Hickory/Pecan) −16
- Morus (Mulberry) −10
- Pinaceae (Pine) −10
- Other Tree −4
- Celtis (Hackberry) −2
Small increase:
- Fraxinus (Ash) +2
Tree pollen was broadly lower across most dominant contributors.
Grass Pollen (+6)
- Grass total increased by 6.
Weed Pollen (+14)
Primary increases:
- Chenopodiaceae/Amaranthaceae (Amaranth) +10
- Plantago (Plantain) +6
Offsetting decline:
- Other Weed −2
Weed pollen gains were concentrated in Amaranth and Plantain.
Mold Spores
Total mold increased by 252.
Largest increases:
- Cladosporium +519
- Penicillium/Aspergillus +210
- Cercospora +22
- Torula +18
- Algae +16
- Rust +12
Largest declines:
- Ascomycetes −300
- Basidiomycetes −154
- Alternaria −40
- Curvularia −18
- Tetraploa −10
While several major mold groups declined, the increase in Cladosporium and the emergence of Penicillium/Aspergillus more than offset those reductions.
Key Takeaways
- Tree pollen dropped sharply, especially Oak and Hickory/Pecan, driving the overall pollen decline.
- Grass and weed pollen rose but not enough to counterbalance the tree decrease.
- Mold increased modestly overall, dominated by a large Cladosporium rise and a notable jump in Penicillium/Aspergillus.
- Several broad mold categories (Ascomycetes and Basidiomycetes) continued to trend lower.
Table of Absolute Changes
| Category | Species | Change |
|---|---|---|
| Tree | Quercus (Oak) | −30 |
| Tree | Carya (Hickory/Pecan) | −16 |
| Mold | Cladosporium | +519 |
| Mold | Penicillium/Aspergillus | +210 |
| Mold | Ascomycetes | −300 |
| Mold | Basidiomycetes | −154 |
| Weed | Chenopodiaceae/Amaranthaceae | +10 |
| Tree | Morus (Mulberry) | −10 |
| Tree | Pinaceae (Pine) | −10 |
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