Detailed pollen and mold reports for Houston Texas. Pollen and mold spore counts are made available Monday through Friday, except for City of Houston holidays.

Feb 19 26: Houston pollen and mold report/count. Pollen: Heavy. Mold: Medium

Overall Overview

Total pollen increased by 287, and total mold increased by 511.

Tree, Grass, and Weed Pollen

  • Tree pollen rose by 285, driven primarily by Birch (+160) and Elm (+95).
  • Additional contributors: Ash (+30), Oak (+20), Pine (+6).
  • Cedar declined (-26).
  • Grass pollen increased (+2).
  • Weed pollen remained unchanged.

Mold Spores

  • Largest increases: Cladosporium (+1,584), Smuts/Myxomycete (+91), Alternaria (+83), Epicoccum (+83), Cercospora (+43).
  • Additional increases: Periconia (+20), Oidium/Erysiphe (+18), Curvularia (+12), Pithomyces (+6), Dreshslera/Helminthosporium (+6).
  • Main decreases: Ascomycetes (-1,231), Basidiomycetes (-138), Torula (-48), Algae (-16).

Key Takeaways

  • Both pollen and mold rose overall.
  • Tree pollen gains were dominated by Birch and Elm spikes.
  • Mold increases were led by a sharp Cladosporium rise despite a major Ascomycetes drop.

Table of Absolute Changes

CategorySpeciesAbsolute Change
TreeBirch+160
TreeElm+95
MoldCladosporium+1584
MoldAscomycetes-1231
MoldSmuts/Myxomycete+91

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