Worst air pollution Västerås, today and tomorrow
Today (30 August): 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 1:00 PM (O3: 27.4/100).
Tomorrow (31 August 2026): Air quality in Västerås is fair. All pollutants stay as today. Pollution peaks around 5:00 PM (O3: 26.6/100). Airmine updates local air quality forecasts four times daily.
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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 - 30 August | Pollution peaks at 13:00
AQI:
Fair
27.4/100
PM2.5 (fine particles):
Good
5.7/100
PM10 (coarse particles):
Good
1.8/100
NO2 (nitrogen dioxide):
Good
12.2/100
O3 (ozone):
Fair
27.4/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
6.8/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 17:00
AQI:
Fair
26.6/100
PM2.5 (fine particles):
Good
4.5/100
PM10 (coarse particles):
Good
1.6/100
NO2 (nitrogen dioxide):
Good
19.4/100
O3 (ozone):
Fair
26.6/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.8/100
PM1 (ultrafine particles):
Good
3.7/100
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 30 August 2026, overall air quality in Västerås is fair. AQI is the main air quality indicator at 27.4/100. Pollution peaks around 1:00 PM (O3: 27.4/100).
Will air quality be worse tomorrow in Västerås?
On 31 August 2026, air quality conditions in Västerås will be similar to today, with AQI forecast at fair at 26.6/100. Pollution peaks around 5:00 PM (O3: 26.6/100).
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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 30 August 2026 at 14:32 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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