Worst air pollution El Prat de Llobregat, today and tomorrow
Today (20 September): Air quality in El Prat de Llobregat is moderate. AQI and NO2 are moderate; PM2.5, O3, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 10:00 AM (NO2: 40.1/100).
Tomorrow (21 September 2026): Air quality in El Prat de Llobregat is moderate. PM2.5 increases to moderate; all other pollutants stay as today. Pollution peaks around 11:00 AM (NO2: 45.9/100). 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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El Prat de Llobregat's air quality reflects its position adjacent to Barcelona El Prat Airport at the Llobregat delta, with concentrated aviation and ground vehicle emissions generating elevated NOₓ and ultrafine particles in the flight path alongside vehicle traffic on the C-31 motorway. The Barcelona Bay sea breeze provides afternoon ventilation, while the airport's extraordinary passenger volume makes El Prat one of Catalonia's most aviation-influenced municipalities throughout the year.
Today - 20 September | Pollution peaks at 10:00
AQI:
Moderate
40.1/100
PM2.5 (fine particles):
Fair
37.0/100
PM10 (coarse particles):
Good
17.8/100
NO2 (nitrogen dioxide):
Moderate
40.1/100
O3 (ozone):
Fair
23.6/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
5.3/100
PM1 (ultrafine particles):
Fair
25.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 11:00
AQI:
Moderate
45.9/100
PM2.5 (fine particles):
Moderate
41.3/100
PM10 (coarse particles):
Good
19.8/100
NO2 (nitrogen dioxide):
Moderate
45.9/100
O3 (ozone):
Fair
21.9/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
6.4/100
PM1 (ultrafine particles):
Fair
35.1/100
Pollen forecast in El Prat de Llobregat
View pollen forecastFrequently Asked Questions
Is air quality bad in El Prat de Llobregat right now?
On 20 September 2026, overall air quality in El Prat de Llobregat is moderate. AQI is the main air quality indicator at 40.1/100. Pollution peaks around 10:00 AM (NO2: 40.1/100).
Will air quality be worse tomorrow in El Prat de Llobregat?
On 21 September 2026, air quality conditions in El Prat de Llobregat will be similar to today, with AQI forecast at moderate at 45.9/100. Pollution peaks around 11:00 AM (NO2: 45.9/100).
When is air pollution at its worst in El Prat de Llobregat?
When is air quality typically worst in El Prat de Llobregat? December through February is often the toughest stretch, driven by temperature inversions that keep exhaust and heating smoke from dispersing on still days. Spring usually brings an improvement as more frequent rain and stronger winds help clear the air and wash out pollutants that built up over winter. Hot, stagnant summer air favours ozone formation, and dry vegetation nearby occasionally adds wildfire smoke to the mix during peak heat. Autumn typically starts mild and can still see occasional ozone or dust episodes before rain and cooler temperatures gradually restore cleaner conditions. 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 El Prat de Llobregat 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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