Barcelona Marathon - Pollen and Air Quality Forecast for Today
Pollen Today
Pollen levels are high today, with mugwort as the main active species. Based on Airmine's forecast, which uses satellite data to calculate exposure every 200 metres along the route, pollen exposure peaks at 30.6 km after start.
Air Quality Today
Air quality along the route is fair. NO2 (26.5/100) and PM2.5 (25.3/100) are fair. The remaining pollutants stay at good levels. Based on Airmine's forecast, which uses satellite data to calculate exposure every 200 metres along the route, air quality is at its worst 30.3 km after start.
Route Map
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Environmental Exposure Detail
The Barcelona Marathon starts on Passeig de Gràcia and passes the Sagrada Família around km 14 before finishing near the Arc de Triomf. With about 134 metres of total climb, it's known as one of Europe's flattest big-city courses.
Around race day for Barcelona Marathon in March, early tree pollen is on the rise as alder, hazel and the first birch begin releasing pollen. Cool conditions (around 12°C) tend to keep pollen release moderate, and frequent rain can help settle pollen, though the damp conditions also favour mould spores. This mainly urban route runs close to traffic, so air pollution (NO2 and particulates) tends to be a bigger factor here than pollen, especially on busier stretches.
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Forecast for 10 October
Pollen Forecast
| 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) | High | 56/100 |
Air Quality Forecast
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 28.0/100 |
| PM2.5 (fine particles) | Fair | 25.3/100 |
| PM10 (coarse particles) | Good | 11.2/100 |
| NO2 (nitrogen dioxide) | Fair | 26.5/100 |
| O3 (ozone) | Good | 10.6/100 |
| SO2 (sulfur dioxide) | Good | 1.9/100 |
| CO (carbon monoxide) | Good | 0.6/100 |
| HCHO (formaldehyde) | Good | 4.1/100 |
| PM1 (ultrafine particles) | Good | 10.8/100 |
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Frequently Asked Questions
Where is air quality worst on the Barcelona Marathon route?
Based on today's forecast, NO2 is forecast at fair levels along the route today (26.5/100). Air quality is at its worst after 30.3 km into the route. Airmine calculates exposure at 200m intervals along the course using satellite-derived atmospheric data.
Where is pollen highest on the Barcelona Marathon course?
Pollen exposure peaks at km 30.6 today. This changes through the season as different pollen species become active.
When is pollen worst during the Barcelona Marathon season?
March coincides with peak mugwort season. Grass pollen typically rises in May-June.
How often is this forecast updated?
Updated four times daily. See the timestamp below for the most recent update.
Are pollen levels in Barcelona Marathon 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 Barcelona Marathon, 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. |
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |