Worst air pollution Chaves, today and tomorrow
Today (16 July): Air quality in Chaves is poor. AQI and NO2 are poor; PM2.5, PM10, and O3 are fair; SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (NO2: 64.3/100).
Tomorrow (17 July 2026): Air quality in Chaves is fair. AQI improves to medium; PM2.5 decreases to good; PM10 decreases to good; NO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 2:00 AM (NO2: 55.1/100). 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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Sitting in the Tâmega river valley near the Spanish border, Chaves sees minimal local traffic in the remote border valley town as the dominant local influence on air quality, while the surrounding Vila Real terrain affects how pollutants disperse. Calm, still conditions tend to let levels build here more than in breezier weather, and the local topography around Chaves can trap emissions for longer stretches during stable atmospheric periods.
Today - 16 July | Pollution peaks at 06:00
AQI:
Poor
64.3/100
PM2.5 (fine particles):
Fair
22.8/100
PM10 (coarse particles):
Fair
23.0/100
NO2 (nitrogen dioxide):
Poor
64.3/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
14.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Good
15.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 02:00
AQI:
Medium
55.1/100
PM2.5 (fine particles):
Good
17.5/100
PM10 (coarse particles):
Good
9.6/100
NO2 (nitrogen dioxide):
Medium
55.1/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
6.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
10.6/100
Pollen forecast in Chaves
View pollen forecastFrequently Asked Questions
Is air quality bad in Chaves right now?
On 16 July 2026, overall air quality in Chaves is poor. AQI is the main air quality indicator at 64.3/100. Pollution peaks around 6:00 AM (NO2: 64.3/100).
Will air quality be worse tomorrow in Chaves?
On 17 July 2026, air quality conditions in Chaves will be better than today, with O3 forecast at fair at 37.6/100. Pollution peaks around 2:00 AM (NO2: 55.1/100).
When is air pollution at its worst in Chaves?
People in Chaves tend to notice worse air when olive and oak pollen peaks, or because of minimal local traffic in the remote border valley town; the remainder of the year in Vila Real generally brings clearer, steadier conditions, especially on breezier days that help disperse local emissions across the surrounding countryside and built-up streets alike.
Are air quality levels in Chaves 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