Mazzariello Labyrinth, Orinda Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Mazzariello Labyrinth, Orinda is moderate; mold (cladosporium) is moderate; ragweed and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (12 October 2026) ragweed remains low, mold (alternaria) remains low, mold (cladosporium) remains moderate, grass at low levels.
7-Day Trend
Over the next week grass, mugwort, ragweed, mold (alternaria), and mold (cladosporium) will increase.
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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) | Low | 1/100 |
| Mold (Alternaria) | Low | 8/100 |
| Mold (Cladosporium) | Moderate | 27/100 |
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) | Low | 1/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 11/100 | |
| Mold (Alternaria) | Low | 11/100 | |
| Mold (Cladosporium) | Moderate | 28/100 |
Local Environmental Conditions
Around 61% of the area near this part of Orinda is woodland, with a good deal of open grassland. The leading allergenic tree nearby is oak, with hazel and maple close behind. Grasses are a major source, with mugwort and plantain adding to the weed pollen load. Oak is unusually common here compared with most other locations, making it a particularly important local pollen source.
Tree pollen peaks in mid-spring, when the weather warms to around 10°C and oak and maple are in full flower. Grasses take over in early summer, with temperatures around 15°C, and their pollen lingers into early fall. Later, mugwort and plantain keep weed pollen in the air through summer. The oak period in mid-spring is usually the most intense time of year here.
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Frequently Asked Questions About Pollen in California
Is pollen high in Orinda right now?
On 11 October 2026, overall pollen levels in Orinda are low. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Orinda tomorrow?
On 12 October 2026, pollen conditions in Orinda will be different from today, with ambrosia at low levels, grass at low levels
Is pollen expected to decrease in Orinda this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Orinda?
On 11 October 2026, Ambrosia is the dominant pollen source in Orinda. artemisia and grass are not currently active.
When is pollen season in Orinda?
How often is the Orinda pollen forecast updated?
The Orinda pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Orinda 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 Orinda 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 Orinda, 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. |
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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).
