Worst air pollution San Cugat del Vallés, today and tomorrow
Today (16 July): Air quality in San Cugat del Vallés is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 53.1/100).
Tomorrow (17 July 2026): Air quality in San Cugat del Vallés is fair. PM2.5 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 57.0/100). 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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Sant Cugat del Vallès's air quality benefits from its elevated position in the Barcelona metropolitan area's Collserola park foothills at 124 metres, with vehicle traffic on the B-23 and surrounding technology campus and residential character contributing local sources. The Collserola hills filter northwesterly winds providing cleaner background air than the dense Eixample below, while the suburban character and green belt setting generally maintain better conditions than central Barcelona.
Today - 16 July | Pollution peaks at 15:00
AQI:
Medium
53.1/100
PM2.5 (fine particles):
Good
17.9/100
PM10 (coarse particles):
Good
11.4/100
NO2 (nitrogen dioxide):
Fair
33.1/100
O3 (ozone):
Medium
53.1/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.6/100
PM1 (ultrafine particles):
Good
17.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Medium
57.0/100
PM2.5 (fine particles):
Fair
21.7/100
PM10 (coarse particles):
Good
10.5/100
NO2 (nitrogen dioxide):
Fair
36.4/100
O3 (ozone):
Medium
57.0/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.1/100
PM1 (ultrafine particles):
Fair
21.3/100
Pollen forecast in San Cugat del Vallés
View pollen forecastFrequently Asked Questions
Is air quality bad in San Cugat del Vallés right now?
On 16 July 2026, overall air quality in San Cugat del Vallés is fair. NO2 is the main pollutant at 33.1/100. Pollution peaks around 3:00 PM (O3: 53.1/100).
Will air quality be worse tomorrow in San Cugat del Vallés?
On 17 July 2026, air quality conditions in San Cugat del Vallés will be similar to today, with NO2 forecast at fair at 36.4/100. Pollution peaks around 3:00 PM (O3: 57.0/100).
When is air pollution at its worst in San Cugat del Vallés?
How do the seasons affect air quality in San Cugat del Vallés? Winter mornings are frequently the year's most polluted, as fog and calm conditions trap traffic fumes and smoke from wood stoves close to the ground. 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. Summer heat and intense sunlight drive photochemical ozone production, which can push afternoon air quality readings higher despite reduced winter-style pollution sources. The transition into autumn generally brings cleaner conditions, as more frequent rainfall and lower temperatures curb ozone formation. 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 San Cugat del Vallés 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app