Casa Nova pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Casa Nova is moderate; willow is moderate; grass is low; cypress is vhigh.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, grass, and willow will decrease.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | Vhigh | 93/100 |
| Grass (Poaceae) | Low | 3/100 |
| Willow (Salicaceae) | Moderate | 41/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | Vhigh | 96/100 | |
| Grass (Poaceae) | Low | 9/100 | |
| Willow (Salicaceae) | Moderate | 41/100 |
Local Environmental Conditions
Casa Nova commands the northeastern Bahia São Francisco River valley as Brazil's largest municipality by area in the semi-arid sertão, where native caatinga scrub, irrigated agriculture, and riparian gallery forest along the São Francisco are the main pollen sources. The very semi-arid climate produces a compressed wet season, while the long dry season concentrates pollen production and the São Francisco River contributes distinctive riparian and irrigated orchard pollen throughout.
Expect the strongest pollen exposure in Casa Nova during the dry season, when irrigated agriculture and riparian gallery forest along the São Francisco pollen disperses most easily, while the wet season brings the regular relief of rainfall.
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Frequently Asked Questions About Pollen in Bahia
Is pollen high in Casa Nova right now?
On 20 September 2026, overall pollen levels in Casa Nova are very high. Cypress is the main contributor to airborne pollen, while willow and grass remain at lower levels
Will pollen levels change in Casa Nova tomorrow?
On 21 September 2026, pollen conditions in Casa Nova will be similar to today, with cypress at very high levels, grass at low levels, willow at moderate levels
Is pollen expected to decrease in Casa Nova this week?
According to the five-day outlook, cypress, grass, and willow pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Casa Nova?
On 20 September 2026, Cypress is the dominant pollen source in Casa Nova. willow and grass are also present but at lower levels.
When is pollen season in Casa Nova?
How often is the Casa Nova pollen forecast updated?
The Casa Nova pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Casa Nova 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 Casa Nova 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 Casa Nova, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
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).
