Worst air pollution Klang, today and tomorrow
Today (16 July): Air quality in Klang is poor. AQI and O3 are poor; PM2.5, NO2, SO2, HCHO, and PM1 are fair; PM10 and CO are good. Pollution peaks around 2:00 PM (O3: 70.3/100).
Tomorrow (17 July 2026): Air quality in Klang 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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Klang's air quality reflects the Selangor Klang River delta's flat coastal industrial position adjacent to Port Klang — Malaysia's largest port — with vehicle traffic on surrounding expressways and the port, manufacturing, and logistics corridor contributing elevated NOₓ and maritime PM2.5. The Malacca Strait provides maritime ventilation, while transboundary haze from Indonesian peatland fires is the primary severe seasonal concern and the extraordinary port volume makes Klang the Klang Valley's most distinctively maritime-industrial environment throughout most of the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
70.3/100
PM2.5 (fine particles):
Fair
30.0/100
PM10 (coarse particles):
Good
8.3/100
NO2 (nitrogen dioxide):
Fair
34.6/100
O3 (ozone):
Poor
70.3/100
SO2 (sulfur dioxide):
Fair
22.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.8/100
PM1 (ultrafine particles):
Fair
38.2/100
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
38.2/100
PM10 (coarse particles):
Good
10.7/100
NO2 (nitrogen dioxide):
Fair
36.9/100
O3 (ozone):
Poor
60.0/100
SO2 (sulfur dioxide):
Fair
27.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.6/100
PM1 (ultrafine particles):
Medium
42.4/100
Frequently Asked Questions
Is air quality bad in Klang right now?
On 16 July 2026, overall air quality in Klang 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 Klang?
On 17 July 2026, air quality conditions in Klang 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 Klang?
In Klang, traffic on the surrounding roads, light manufacturing, along with harbour and shipping traffic are the main local sources, with conditions worsening when dry, windy weather picks up. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Onshore breezes usually help clear the air, but pollution can build up when winds are light.
Are air quality levels in Klang 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