Worst air pollution Petaling Jaya, today and tomorrow
Today (10 August): Air quality in Petaling Jaya 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 Petaling Jaya is very poor. PM10 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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Petaling Jaya's air quality reflects the Klang Valley's flat suburban position adjacent to Kuala Lumpur, with vehicle traffic on the LDP Expressway and surrounding technology campus, residential, and commercial 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 Petaling Jaya generally maintains moderate Malaysian suburban metropolitan readings throughout non-haze periods.
Today - 10 August | Pollution peaks at 14:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Medium
48.4/100
PM10 (coarse particles):
Fair
21.3/100
NO2 (nitrogen dioxide):
Medium
52.2/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Fair
37.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.4/100
PM1 (ultrafine particles):
Medium
54.6/100
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
43.4/100
PM10 (coarse particles):
Good
15.5/100
NO2 (nitrogen dioxide):
Medium
45.9/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Fair
25.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.8/100
PM1 (ultrafine particles):
Medium
47.5/100
Frequently Asked Questions
Is air quality bad in Petaling Jaya right now?
On 10 August 2026, overall air quality in Petaling Jaya 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 Petaling Jaya?
On 11 August 2026, air quality conditions in Petaling Jaya 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 Petaling Jaya?
In Petaling Jaya, traffic on the surrounding roads is the main local source, with conditions worsening when winds are light and dispersion is poor. Background emissions and local weather both shape how conditions change from day to day. Conditions can otherwise vary considerably with the weather.
Are air quality levels in Petaling Jaya 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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