Overall Overview

Total pollen increased by 1,143, driven by a major surge in tree pollen. Total mold decreased by 466, reflecting declines in several dominant mold groups.

Tree, Grass, and Weed Pollen

  • Tree pollen rose by 1,143, led by Elm (+631) and Cedar (+496).
  • Additional increases: Pine (+14), Other Tree (+14), Ash (+2).
  • Birch (-14) declined.
  • Grass pollen remained at zero.
  • Weed pollen remained at zero across all species.

Mold Spores

  • Largest increases: Smuts/Myxomycete (+129), Basidiomycetes (+119), Penicillium/Aspergillus (+25), Dreshslera/Helminthosporium (+14), Curvularia (+12).
  • Largest decreases: Ascomycetes (-537), Cladosporium (-118), Epicoccum (-46), Alternaria (-40).
  • Smaller declines: Nigrospora (-8), Periconia (-6), Torula (-6), Rust (-2), Cercospora (-2).

Key Takeaways

  • Tree pollen spiked sharply, dominated by large jumps in Elm and Cedar.
  • Mold totals fell overall despite increases in several minor groups.
  • The pollen environment shifted from low to very high in a single day.

Table of Absolute Changes

CategorySpeciesAbsolute Change
TreeElm+631
TreeCedar+496
TreeBirch-14
MoldAscomycetes-537
MoldCladosporium-118
MoldSmuts/Myxomycete+129

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