Worst air pollution Gros - Donostia, today and tomorrow
Today (16 July): Air quality in Gros is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 33.2/100).
Tomorrow (17 July 2026): Air quality in Gros is fair. All pollutants stay as today. Pollution peaks around 2:00 PM (O3: 27.6/100). 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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In Gros, local traffic and light industry in some towns play the biggest role locally. Levels stay low most of the year, with brief dips during still, foggy spells. Frequent rain washes pollutants out of the air more often than in drier parts of Spain.
Today - 16 July | Pollution peaks at 17:00
AQI:
Fair
33.2/100
PM2.5 (fine particles):
Good
6.5/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Good
6.0/100
O3 (ozone):
Fair
33.2/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.7/100
PM1 (ultrafine particles):
Good
5.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Fair
27.6/100
PM2.5 (fine particles):
Good
4.2/100
PM10 (coarse particles):
Good
1.6/100
NO2 (nitrogen dioxide):
Good
3.3/100
O3 (ozone):
Fair
27.6/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
3.0/100
Other Landmarks in Donostia
Sports venues in Donostia
Frequently Asked Questions
Is air quality bad in Gros right now?
On 16 July 2026, overall air quality in Gros is fair. AQI is the main air quality indicator at 33.2/100. Pollution peaks around 5:00 PM (O3: 33.2/100).
Will air quality be worse tomorrow in Gros?
On 17 July 2026, air quality conditions in Gros will be similar to today, with AQI forecast at fair at 27.6/100. Pollution peaks around 2:00 PM (O3: 27.6/100).
When is air pollution at its worst in Gros?
What is the yearly air quality pattern like in Gros? December through February is often the toughest stretch, driven by temperature inversions that keep exhaust and heating smoke from dispersing on still days. Conditions generally start to recover in spring, as increasing wind and rainfall break up the stagnant air masses typical of winter. During summer, strong sunlight and high temperatures accelerate ozone formation, occasionally offsetting the drop in traffic and heating-related emissions. Autumn is typically a recovery period, with increasing rainfall and cooler air gradually reducing both ozone and traffic-related pollution. Proximity to the Atlantic brings enough rain and wind through most of the year to limit how long pollution episodes last here.
Are air quality levels in Gros 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.
Want to see air quality forecasts for other cities in Spain?
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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