Worst air pollution Granollers, today and tomorrow
Today (9 August): Air quality in Granollers is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 38.9/100).
Tomorrow (10 August 2026): Air quality in Granollers is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 34.2/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Granollers' air quality reflects the Vallès Oriental industrial corridor northeast of Barcelona, with vehicle traffic on the C-17 and AP-7 motorways and the surrounding automotive, manufacturing, and logistics industry contributing elevated NOₓ and industrial PM2.5. The Montseny massif to the north and the Collserola ridge to the south create partial topographic enclosure, while the Barcelona metropolitan sea breeze provides afternoon ventilation and the industrial valley character keeps readings elevated throughout the year.
Today - 9 August | Pollution peaks at 15:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
11.2/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Good
12.2/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.9/100
PM1 (ultrafine particles):
Good
11.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 14:00
AQI:
Fair
34.2/100
PM2.5 (fine particles):
Good
15.3/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Good
12.3/100
O3 (ozone):
Fair
34.2/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Good
17.0/100
Pollen forecast in Granollers
View pollen forecastFrequently Asked Questions
Is air quality bad in Granollers right now?
On 9 August 2026, overall air quality in Granollers is fair. AQI is the main air quality indicator at 38.9/100. Pollution peaks around 3:00 PM (O3: 38.9/100).
Will air quality be worse tomorrow in Granollers?
On 10 August 2026, air quality conditions in Granollers will be similar to today, with AQI forecast at fair at 34.2/100. Pollution peaks around 2:00 PM (O3: 34.2/100).
When is air pollution at its worst in Granollers?
What time of year has the cleanest air in Granollers? The winter months typically bring the weakest air quality of the year, as calm anticyclonic conditions trap vehicle and heating pollution near the surface. Spring often marks a turning point, with increasing storminess and rainfall helping to clear accumulated exhaust and smoke from the air. Summer can bring periodic wildfire smoke on top of the usual ozone build-up from intense heat and sunshine. Autumn generally marks the shift back toward calmer, cleaner conditions as temperatures drop and rainfall becomes more regular. Sea breezes along this stretch of coast generally support air quality, but summer holiday traffic and occasional calima dust events can interrupt that.
Are air quality levels in Granollers based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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