Very Low Pollen in Santa Ana, CA

Very low today, mostly grass pollen.

Last updated September 30, 2026

Today's index1out of 5Very Low
TreeNonein season
GrassVery Lowin season
WeedVery Lowin season

Driving it today

OakQuercusElmUlmusCallistemonCallistemonPittosporumPittosporumLophostemonLophostemonGrassesRagweed

Forecast

Thu
1
Fri
1
Sat
1
Sun
1

About pollen in Santa Ana

Pollen activity in Santa Ana is quiet today. Tree pollen is absent, while grass and weed pollen are both at very low levels, which means most people should not notice any effect. Even those with sensitivities are unlikely to feel much irritation under these conditions. Looking ahead, the pattern should hold steady over the next several days, with tree pollen staying absent and grass and weed levels remaining low but present. This fits the season well: local trees like oak, elm, callistemon, pittosporum, and lophostemon typically release their heaviest pollen in spring, so their dormancy now is expected. Weeds such as ragweed are more common in late summer and early fall, but their presence here remains minimal, so overall conditions should stay easy to manage in the near term.

What to do today

  • Pollen levels are very low right now. It's a great day to enjoy the outdoors!

Tree map

Every dot is a tree near Santa Ana, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.

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Top tree-pollen sources

The local tree genera behind today's pollen near Santa Ana. Each bar is that genus's share of the tree pollen.

67 pollen-relevant trees nearby drive today's tree-pollen reading.

  • OakQuercus87%
  • ElmUlmus3%
  • Callistemon3%
  • Pittosporum2%
  • Lophostemon2%
  • Podocarpus1%

Meet the trees near you

Get to know the tree types growing around Santa Ana: what each looks like, how allergenic it is, and when it blooms.

Canary island pine

Canary island pine

Pinus canariensis

Allergenicity 1/4Blooms spring
Ornamental pear

Ornamental pear

Pyrus calleryana

Allergenicity 1/4Blooms spring
Aristocrat pear

Aristocrat pear

Pyrus calleryana

Allergenicity 1/4Blooms spring
Afghan pine

Afghan pine

Pinus eldarica

Allergenicity 1/4Blooms spring
California sycamore

California sycamore

Platanus racemosa

Allergenicity 4/4Blooms spring
Evergreen pear

Evergreen pear

Pyrus kawakamii

Allergenicity 1/4Blooms spring
Holly oak

Holly oak

Quercus ilex

Allergenicity 4/4Blooms spring
Aleppo pine

Aleppo pine

Pinus halepensis

Allergenicity 1/4Blooms spring
Italian stone pine

Italian stone pine

Pinus pinea

Allergenicity 1/4Blooms spring
Leaf plum purple

Leaf plum purple

Prunus cerasifera

Allergenicity 1/4Blooms spring
London plane

London plane

Platanus acerifolia

Allergenicity 4/4Blooms spring
Shamel ash

Shamel ash

Fraxinus uhdei

Allergenicity 4/4Blooms spring
American sweetgum

American sweetgum

Liquidambar styraciflua

Allergenicity 2/4Blooms spring
Hollywood juniper

Hollywood juniper

Juniperus chinensis

Allergenicity 5/4Blooms winter,spring
White alder

White alder

Alnus rhombifolia

Allergenicity 4/4Blooms winter,spring
Olive

Olive

Olea europaea

Allergenicity 5/4Blooms spring,summer

Common questions

What is the pollen count in Santa Ana, CA today?
Santa Ana, CA is at a very low 1 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. The five-day outlook holds steady around 1 of 5.
Is grass pollen high in Santa Ana, CA right now?
Grass pollen is very low today at 1 of 5, and it's in season now. Most people won't notice it.
What plants are causing allergies in Santa Ana, CA?
The main sources right now are Oak, Elm, Callistemon, Pittosporum, and Lophostemon. Elm (Ulmaceae (the Elm family), Two distinct seasons, late winter to early spring, and late summer to fall (species dependent)) is actively pollinating.