Worst air pollution Porrentruy, today and tomorrow
Today (16 July): Air quality in Porrentruy is fair. PM1 is fair; AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 50.0/100).
Tomorrow (17 July 2026): Air quality in Porrentruy is fair. O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 AM (NO2: 40.8/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Porrentruy's air quality benefits from its position in the rural Ajoie region near the French border, with vehicle traffic on regional roads the primary local source amid otherwise open Jura countryside.
Today - 16 July | Pollution peaks at 15:00
AQI:
Medium
50.0/100
PM2.5 (fine particles):
Good
17.8/100
PM10 (coarse particles):
Good
6.2/100
NO2 (nitrogen dioxide):
Medium
43.8/100
O3 (ozone):
Medium
50.0/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.3/100
PM1 (ultrafine particles):
Fair
21.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 03:00
AQI:
Medium
40.8/100
PM2.5 (fine particles):
Good
9.7/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Medium
40.8/100
O3 (ozone):
Fair
34.7/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
10.6/100
Pollen forecast in Porrentruy
View pollen forecastFrequently Asked Questions
Is air quality bad in Porrentruy right now?
On 16 July 2026, overall air quality in Porrentruy is fair. PM1 is the main pollutant at 21.3/100. Pollution peaks around 3:00 PM (O3: 50.0/100).
Will air quality be worse tomorrow in Porrentruy?
On 17 July 2026, air quality conditions in Porrentruy will be similar to today, with O3 forecast at fair at 34.7/100. Pollution peaks around 3:00 AM (NO2: 40.8/100).
When is air pollution at its worst in Porrentruy?
The worst stretch for air quality at Porrentruy tends to be a calm winter day, as vehicle traffic and farmland activity gather near the Jura's edge across this open countryside. The rest of the year sees much better conditions across this stretch of the Mittelland, with summer's ozone spikes limited to the hottest, stillest days.
Are air quality levels in Porrentruy 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 Switzerland?
Check air quality in other popular cities:
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