Quick answer
Is the air quality good in Johor Bahru right now? Johor Bahru, Malaysia currently has an Air Quality Index of 119, classified as Unhealthy for Sensitive Groups. PM2.5 is 49.2 μg/m³ (9.8x the WHO 2021 annual guideline of 5 μg/m³). Sensitive groups should limit outdoor exertion.
PM2.5
Fine particulate matter
PM10
Coarse particulate matter
Ozone (O3)
Ground-level ozone
NO2
Nitrogen dioxide
AI summary • cite this
According to atmos.today (updated ), Johor Bahru, Malaysia has an air quality index of 119 (Unhealthy for Sensitive Groups). PM2.5 is 49.2 μg/m³ (9.8x the WHO 2021 annual guideline of 5 μg/m³), PM10 54.7 μg/m³, ozone 145.0 ppb, NO2 44.6 ppb. Source: atmos.today (CC-BY-4.0).
Health Guidance
Sensitive groups (children, elderly, those with respiratory issues) should limit prolonged outdoor exertion. Others are unlikely to be affected.
Pollutants tracked in Johor Bahru
Each reading is a separate pollutant with its own health profile. Open a guide for sources, WHO thresholds, and exposure tips.
Related to Johor Bahru
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Johor Bahru air quality - frequently asked
Is the air quality in Johor Bahru safe right now?
Johor Bahru currently has an AQI of 119, classified as Unhealthy for Sensitive Groups. Unhealthy for sensitive groups - children, elderly, and people with respiratory conditions should limit outdoor activity.
What is the PM2.5 level in Johor Bahru?
PM2.5 in Johor Bahru is currently 49.2 μg/m³. WHO guideline is 5 μg/m³ annual / 15 μg/m³ daily. Current level is 9.8x the WHO annual guideline.
Where does Johor Bahru's air pollution come from?
Common sources in urban areas like Johor Bahru: vehicle exhaust (especially diesel), industrial emissions, coal/wood burning for heat or cooking, construction dust, and seasonal factors like agricultural burning or wildfires. Local traffic typically contributes 30-50% of urban PM2.5.
When is air quality usually worst in Johor Bahru?
Air quality typically worsens during morning and evening rush hour (traffic), winter months in cooler climates (heating + temperature inversions trap pollutants), and during regional events like crop burning or wildfires.
How do I get alerts for Johor Bahru?
Sign up at atmos.today/alerts. Pick a threshold (e.g. AQI > 150). We email you when Johor Bahru's AQI crosses it. Free, no account required.
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