
Oak
Quercus
Very low today, mostly tree pollen.
Last updated July 28, 2026
Pollen levels around Santa Rosa remain quiet today. Tree pollen is the only category showing any activity, and it sits at a very low level, so most people should notice little to nothing in the way of symptoms. Local trees such as oak, sequoia, willow, and pine are technically still releasing some pollen, but the amounts are minimal enough that sensitive individuals are unlikely to feel much effect. Looking ahead, conditions are expected to stay calm over the next several days, with tree pollen holding steady at this same low level. This fits the season, since summer typically brings a lull between the spring tree pollen surge and the grass and late-summer weed pollen that can pick up as the season progresses. For now, air quality with respect to pollen remains favorable, offering a bit of a breather before activity potentially rises again later in the season.
Every dot is a tree near Santa Rosa, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.
The local tree genera behind today's pollen near Santa Rosa. Each bar is that genus's share of the tree pollen.
110 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Santa Rosa: what each looks like, how allergenic it is, and when it blooms.

Oak
Quercus

Maple
Acer

Sycamore
Platanus acerifolia

Pear
Pyrus

Pine
Pinus

Plum
Prunus

Hackberry
Celtis occidentalis

Willow
Salix

Walnut
Juglans

Alder
Alnus

Raywood ash
Fraxinus oxycarpa

Poplar
Populus

Sweetgum
Liquidambar styraciflua

Tree

Pistache

Redwood
Sequoia sempervirens