American River Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in American River is moderate; cypress, eucalyptus, and mold (cladosporium) are moderate; acacia, grass, and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) mold (alternaria) remains low, mold (cladosporium) remains moderate, cypress declining, eucalyptus declining, acacia no longer expected, grass no longer expected.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, grass, mold (alternaria), and mold (cladosporium) will increase.
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Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 25/100 |
| Cypress (Cupressaceae) | Moderate | 48/100 |
| Eucalyptus (Myrtaceae) | Moderate | 44/100 |
| Grass (Poaceae) | Low | 16/100 |
| Mold (Alternaria) | Low | 17/100 |
| Mold (Cladosporium) | Moderate | 29/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | None | 0/100 | |
| Cypress (Cupressaceae) | Low | 16/100 | |
| Eucalyptus (Myrtaceae) | Low | 12/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Mold (Alternaria) | Low | 13/100 | |
| Mold (Cladosporium) | Moderate | 30/100 |
Local Environmental Conditions
Open grassland makes up around 40% of the area near American River, with a good deal of open water and woodland. The damp ground beside a watercourse nearby supports trees, shrubs and reeds, adding to local pollen. The surrounding woodland makes trees an important local pollen source. Grasses also feature strongly, alongside pigweed among the weeds.
Flowering trees bring the first pollen of the year in early spring. Then come the grasses, strongest in early summer and fading by early fall. Pigweed brings a final peak from early summer into early fall. Winter is the wettest time of year, and heavy showers can bring short breaks in pollen.
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Frequently Asked Questions About Pollen in South Australia
Is pollen high in American River right now?
On 10 October 2026, overall pollen levels in American River are moderate. Cypress is the main contributor to airborne pollen, while myrtle, acacia, and grass remain at lower levels
Will pollen levels change in American River tomorrow?
On 11 October 2026, pollen conditions in American River will be different from today, with cypress, myrtle continuing to decline
Is pollen expected to decrease in American River this week?
According to the five-day outlook, acacia, cypress, myrtle, and grass pollen levels will increase later in the week.
Which pollen types are currently active in American River?
On 10 October 2026, Cypress is the dominant pollen source in American River. myrtle, acacia, and grass are also present but at lower levels.
When is pollen season in American River?
How often is the American River pollen forecast updated?
The American River pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in American River 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 American River 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 American River, 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).
