Worst air pollution Petaling Jaya, today and tomorrow
Today (16 July): Air quality in Petaling Jaya is poor. AQI and O3 are poor; PM2.5, SO2, HCHO, and PM1 are fair; NO2 is medium; PM10 and CO are good. Pollution peaks around 2:00 PM (O3: 70.3/100).
Tomorrow (17 July 2026): Air quality in Petaling Jaya is poor. PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 60.0/100). 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 - 16 July | Pollution peaks at 14:00
AQI:
Poor
70.3/100
PM2.5 (fine particles):
Fair
30.7/100
PM10 (coarse particles):
Good
8.5/100
NO2 (nitrogen dioxide):
Medium
40.8/100
O3 (ozone):
Poor
70.3/100
SO2 (sulfur dioxide):
Fair
28.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.8/100
PM1 (ultrafine particles):
Fair
39.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Poor
60.0/100
PM2.5 (fine particles):
Fair
39.1/100
PM10 (coarse particles):
Good
11.0/100
NO2 (nitrogen dioxide):
Medium
42.0/100
O3 (ozone):
Poor
60.0/100
SO2 (sulfur dioxide):
Fair
35.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.6/100
PM1 (ultrafine particles):
Medium
42.7/100
Frequently Asked Questions
Is air quality bad in Petaling Jaya right now?
On 16 July 2026, overall air quality in Petaling Jaya is poor. AQI is the main air quality indicator at 70.3/100. Pollution peaks around 2:00 PM (O3: 70.3/100).
Will air quality be worse tomorrow in Petaling Jaya?
On 17 July 2026, air quality conditions in Petaling Jaya will be similar to today, with AQI forecast at poor at 60.0/100. Pollution peaks around 12:00 PM (O3: 60.0/100).
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.
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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