Worst air pollution Shah Alam, today and tomorrow
Today (10 August): Air quality in Shah Alam is very poor. AQI and O3 are very poor; PM10, SO2, and HCHO are fair; PM2.5, NO2, and PM1 are medium; CO is good. Pollution peaks around 2:00 PM (O3: 100/100).
Tomorrow (11 August 2026): Air quality in Shah Alam is very poor. PM10 decreases to good; SO2 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 100/100). 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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Shah Alam's air quality reflects the Selangor Klang Valley's flat suburban position, with vehicle traffic on the NKVE and surrounding manufacturing, university, and government character contributing local sources. The Klang Valley's partial Titiwangsa Mountain enclosure creates concentration under calm conditions, while transboundary haze from Indonesian peatland fires represents the primary severe seasonal concern and Shah Alam generally maintains moderate Malaysian Klang Valley suburban readings throughout non-haze periods.
Today - 10 August | Pollution peaks at 14:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Medium
47.8/100
PM10 (coarse particles):
Fair
20.7/100
NO2 (nitrogen dioxide):
Medium
44.6/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Fair
27.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.4/100
PM1 (ultrafine particles):
Medium
53.8/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Medium
43.0/100
PM10 (coarse particles):
Good
14.9/100
NO2 (nitrogen dioxide):
Medium
40.1/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Good
18.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.8/100
PM1 (ultrafine particles):
Medium
46.9/100
Frequently Asked Questions
Is air quality bad in Shah Alam right now?
On 10 August 2026, overall air quality in Shah Alam is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 2:00 PM (O3: 100/100).
Will air quality be worse tomorrow in Shah Alam?
On 11 August 2026, air quality conditions in Shah Alam will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 3:00 PM (O3: 100/100).
When is air pollution at its worst in Shah Alam?
Air quality in Shah Alam tends to be worse when traffic on the surrounding roads together with manufacturing and food processing build up and winds are light and dispersion is poor. Background emissions and local weather both shape how conditions change from day to day. Local weather patterns add further day-to-day variation.
Are air quality levels in Shah Alam 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: 9 August 2026 at 20:27 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.
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