San Francisco Pollen Count

Pollen counts as a % of the season’s peak load of the plant.

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Click on the tree name to see what it looks like!

San Francisco Pollen Count Commentary

I do regular air sampling and plant inspection to bring you the most accurate pollen count of San Francisco. The city’s rich and biodiverse urban forest is home to many allergy plants. Fortunately, the tall buildings get in the way of pollen travel, which keeps the San Francisco pollen count a bit lower than the surrounding Bay Area.

In addition to a large number of trees in the city, grass and weeds from the Twin Peaks, Bernal Heights, and other urban hiking trails also contribute to the San Francisco pollen count.

Cypress, Sequoia, Birch, Oak, Chinese Elm, Olive, and Sycamore trees are some of the major sources of pollen in San Francisco.

Just like the rest of the Bay Area, the pollen count in San Francisco remains elevated from January to June. After that, during summer and fall, Chinese elm, Casuarina, and privet are the only major sources of pollen left.

Fortunately, there is no ragweed in the city, and residents are spared from its pollen during summer and fall.

Our air sampling locations for San Francisco are:

Bernal Heights, San Francisco, CA 94110

Twin Peaks, San Francisco, CA 94114

Golden Gate Park, San Francisco, CA 94121

If allergies have adversely impacted your lives, you would definitely benefit from the following three guides.

  • Pollen pictures of allergy plants.

    Pollen pictures of allergy plants.

    The pollen pictures below were taken in my lab using an Olympus compound microscope. To bring clarity to the features of the pollen, different level of digital zoom is used.

  • Pollen allergy: A beginner’s guide with photos.

    Pollen allergy: A beginner’s guide with photos.

    In his influential book – “The art of war”, general Sun Tzu wrote, ” If you know the enemy and know yourself, you need not fear the results of hundred

  • Grass allergy – A beginner’s guide w/ photos

    Grass allergy – A beginner’s guide w/ photos

    What is grass allergy? Many allergy sufferers misunderstand grass allergies to be a reaction to the soft green swath that adorns their front lawn, or, the one they see in

Our Methodology

We use a combination of air sampling and plant inspections to identify which plants are releasing pollen.

We refrain from using the traditional high, medium, and low classifications because they are rather meaningless for an allergy sufferer. The concentration scales of high-medium-low are designed for academics and not for allergy sufferers. Besides, what is a low count for one person can be very high for someone with strong allergies.

If you are still curious, you can read more about our methodology here.

Sudhir Setia

Sudhir is certified by the National Allergy Bureau (NAB) as a pollen counter and identifier. He has been living with Hay Fever for nearly 30 years and studies allergens at his aerobiology lab.

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