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.

Houston Texas Pollen and Mold Counts (October 8, 2024, to October 9, 2024)

Pollen:

• Houston Texas Tree Pollen: Increased from 6 to 8 (+2, +33%), with an addition of counts in Other Tree species.
• Houston Texas Grass Pollen: Increased from 4 to 6 (+2, +50%).
• Houston Texas Weed Pollen: Rose from 548 to 623 (+75, +14%), driven mainly by an increase in Ambrosia (Ragweed).

Mold:

• Total Mold: Decreased from 16,497 to 14,862 (-1,635, -10%), with a sharp decline in Cladosporium and Ascomycetes.

Detailed Changes:

Tree Pollen:

• Ulmus (Elm): Remained at 6.
• Other Tree: Increased by 2 (from 0 to 2).

Grass Pollen:

• Increased by 2 (from 4 to 6).

Weed Pollen:

• Ambrosia (Ragweed): Increased by 77 (from 534 to 611).
• Artemisia (Sage): Decreased by 2 (from 6 to 4).
• Cyperaceae (Sedge): Increased by 4 (from 0 to 4).
• Chenopodiaceae/Amaranthaceae (Amaranth): Increased by 4 (from 0 to 4).
• Other Weed: Decreased by 8 (from 8 to 0).

Mold:

• Algae: Increased to 56 (from 0).
• Alternaria: Increased sharply by 221 (from 78 to 299).
• Ascomycetes: Decreased by 753 (from 3,790 to 3,037).
• Basidiomycetes: Increased by 81 (from 1,765 to 1,846).
• Cercospora: Increased by 312 (from 457 to 769).
• Cladosporium: Decreased by 1,652 (from 8,869 to 7,217).
• Curvularia: Increased by 47 (from 147 to 194).
• Drechslera/Helminthosporium: Remained at 46.
• Epicoccum: Increased by 20 (from 24 to 44).
• Nigrospora: Decreased by 10 (from 30 to 20).
• Oidium/Erysiphe (Powdery Mildew): Increased by 2 (from 6 to 8).
• Penicillium/Aspergillus: Decreased by 126 (from 599 to 473).
• Periconia: Increased by 66 (from 164 to 230).
• Pithomyces: Increased by 6 (from 22 to 28).
• Rust: Decreased by 6 (from 20 to 14).
• Smuts/Myxomycete: Increased by 89 (from 463 to 552).
• Spegazinia: Increased by 4 (from 2 to 6).
• Stemphyllium: Remained at 12.
• Tetraploa: Appeared with a count of 2.
• Torula: Increased by 6 (from 3 to 9).

Summary:

• Houston Texas Pollen: Overall pollen levels increased moderately, with notable rises in Tree Pollen, Grass Pollen, and Weed Pollen, particularly Ambrosia (Ragweed).
• Houston Texas Mold: Mold levels dropped by 10%, driven by a sharp decline in Cladosporium and Ascomycetes, though Alternaria and a few other mold species showed significant increases.