Worst air pollution Rubí, today and tomorrow
Today (20 September): Air quality in Rubí is moderate. AQI and PM2.5 are moderate; PM10, NO2, O3, and PM1 are fair; SO2, CO, and HCHO are good. Pollution peaks around 1:00 AM (PM2.5: 42.4/100).
Tomorrow (21 September 2026): Air quality in Rubí is moderate. NO2 increases to moderate; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 47.3/100). 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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Rubí's air quality reflects the Llobregat valley in the Barcelona metropolitan area's western industrial corridor, with vehicle traffic on the B-23 motorway and surrounding automotive, chemical, and manufacturing industry contributing elevated NOₓ and industrial PM2.5. The Collserola ridge and the Prelitoral mountain range create partial topographic enclosure, while the Barcelona Bay sea breeze provides afternoon ventilation and the industrial valley character keeps readings elevated above suburban Barcelona averages.
Today - 20 September | Pollution peaks at 01:00
AQI:
Moderate
42.4/100
PM2.5 (fine particles):
Moderate
42.4/100
PM10 (coarse particles):
Fair
22.7/100
NO2 (nitrogen dioxide):
Fair
36.9/100
O3 (ozone):
Fair
23.9/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
9.9/100
PM1 (ultrafine particles):
Fair
23.6/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 22:00
AQI:
Moderate
47.3/100
PM2.5 (fine particles):
Moderate
41.6/100
PM10 (coarse particles):
Fair
21.6/100
NO2 (nitrogen dioxide):
Moderate
47.3/100
O3 (ozone):
Fair
23.6/100
SO2 (sulfur dioxide):
Good
3.4/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
10.6/100
PM1 (ultrafine particles):
Fair
24.3/100
Pollen forecast in Rubí
View pollen forecastFrequently Asked Questions
Is air quality bad in Rubí right now?
On 20 September 2026, overall air quality in Rubí is moderate. AQI is the main air quality indicator at 42.4/100. Pollution peaks around 1:00 AM (PM2.5: 42.4/100).
Will air quality be worse tomorrow in Rubí?
On 21 September 2026, air quality conditions in Rubí will be similar to today, with AQI forecast at moderate at 47.3/100. Pollution peaks around 10:00 PM (NO2: 47.3/100).
When is air pollution at its worst in Rubí?
Does air quality in Rubí vary by season? The coldest months usually see the year's poorest conditions, since calm anticyclonic weather holds local traffic and wood-burning pollution near street level. Air quality usually improves through spring, helped by more frequent frontal systems that bring rain and stronger winds to disperse local emissions. The heat of summer drives up ozone formation, and dry conditions occasionally bring smoke from regional wildfires into the mix. Early autumn can still bring warm, stagnant spells before the season's returning rain and wind begin clearing the air. The mild, breezy Mediterranean climate generally supports good dispersal, though summer crowds and Saharan dust intrusions can occasionally push levels higher.
Are air quality levels in Rubí 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: 20 September 2026 at 14:33 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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