Worst air pollution Västerås, today and tomorrow
Today (16 July): Air quality in Västerås is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 25.8/100).
Tomorrow (17 July 2026): Air quality in Västerås is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 31.5/100). 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
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Västerås's air quality is generally good by European standards, benefiting from Lake Mälaren's consistent westerly and northerly lake breezes providing reliable ventilation across this central Swedish industrial city. The ABB power systems and surrounding heavy manufacturing industry represent Sweden's historically most significant industrial emission corridor, while vehicle traffic on the E18 and progressive industrial emission reduction programmes have steadily improved baseline conditions, generally maintaining moderate Swedish urban air quality levels throughout the year.
Today - 16 July | Pollution peaks at 16:00
AQI:
Fair
25.8/100
PM2.5 (fine particles):
Good
11.0/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Good
17.0/100
O3 (ozone):
Fair
25.8/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.7/100
PM1 (ultrafine particles):
Good
12.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
31.5/100
PM2.5 (fine particles):
Good
11.8/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Fair
28.1/100
O3 (ozone):
Fair
31.5/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
13.9/100
Pollen forecast in Västerås
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Västerås
Frequently Asked Questions
Is air quality bad in Västerås right now?
On 16 July 2026, overall air quality in Västerås is fair. AQI is the main air quality indicator at 25.8/100. Pollution peaks around 4:00 PM (O3: 25.8/100).
Will air quality be worse tomorrow in Västerås?
On 17 July 2026, air quality conditions in Västerås will be similar to today, with AQI forecast at fair at 31.5/100. Pollution peaks around 3:00 PM (O3: 31.5/100).
When is air pollution at its worst in Västerås?
What is the yearly air quality pattern like in Västerås? The darkest winter months tend to bring the year's weakest readings, since calm, cold air allows pollutants from heating and traffic to accumulate rather than disperse. Spring usually marks a turning point, with more active weather systems reducing how often pollutants can accumulate. Summer generally brings the year's best air quality, thanks to longer days, more ventilation, and less need for heating. Conditions gradually shift through autumn, with cooling temperatures reviving wood-burning and calmer nights allowing brief local build-ups. This pattern reflects a fairly classic central Swedish climate, with clear seasonal transitions.
Are air quality levels in Västerås 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 Sweden?
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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