Common allergens (30 day/1 week lookback)
The below charts show the 30 day and 1 week lookback for the most common irritants in Houston.
In order: (1) Cedar (2) Oak (3) Elm (4) Grass (5) Ragweed (6) Ascomycetes (7) Basidiomycetes (8) Cladosporium
Cedar 30-day
Oak 30-day
Oak 1 week
Elm 30-day
Elm 1 week
Grass 30-day
Grass 1 week
Ragweed 30-day
Ragweed 1 week
Ascomycetes 30-day
Ascomycetes 1 week
Basidiomycetes 30-day
Basidiomycetes 1 week
Cladosporium 30-day
Cedar 1 week
Cladosporium 1 week