Upper Blue Lake Dam Site Expansion Campground, South Lake Tahoe Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Upper Blue Lake Dam Site Expansion Campground, South Lake Tahoe is low; mold (alternaria) and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (12 October 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort, ragweed, mold (alternaria), and mold (cladosporium) will increase; grass will remain stable.
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Pollen Risk
Today - 11 October
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | None | 0/100 |
| Mold (Alternaria) | Low | 3/100 |
| Mold (Cladosporium) | Low | 16/100 |
Tomorrow - 12 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | None | 0/100 | |
| Mold (Alternaria) | Low | 3/100 | |
| Mold (Cladosporium) | Low | 13/100 |
Local Environmental Conditions
The area around this site in South Lake Tahoe is a patchwork of woodland, open grassland and open water. With Upper Blue Lake nearby, lakeside trees such as willow and poplar along its shore contribute to the local mix. Among allergenic trees nearby, juniper leads, followed by poplar and willow. Grasses are a major source, with mugwort adding to the weed pollen load.
Across the year, tree pollen comes first, with juniper, poplar and willow in flower from early spring into mid-spring. From mid-spring, grass pollen rises to a peak around early summer before easing off by late summer. Mugwort brings a later peak from midsummer into early fall. Winters average around freezing and summers around 20°C, with most rain falling in the cooler months.
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Frequently Asked Questions About Pollen in California
Is pollen high in South Lake Tahoe right now?
Currently, there is no significant pollen in South Lake Tahoe.
Will pollen levels change in South Lake Tahoe tomorrow?
On 12 October 2026, pollen conditions in South Lake Tahoe will be similar to today with no significant pollen expected.
Is pollen expected to decrease in South Lake Tahoe this week?
According to the five-day outlook, ambrosia and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in South Lake Tahoe?
On 11 October 2026, there are no significant pollen types in South Lake Tahoe.
When is pollen season in South Lake Tahoe?
How often is the South Lake Tahoe pollen forecast updated?
The South Lake Tahoe pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in South Lake Tahoe come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in South Lake Tahoe based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in South Lake Tahoe, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
