Quick answer
Is the air quality good in Phnom Penh right now? Phnom Penh, Cambodia currently has an Air Quality Index of 153, classified as Unhealthy. PM2.5 is 55.1 μg/m³ (11.0x the WHO 2021 annual guideline of 5 μg/m³). Reduce outdoor exposure; wear an N95 mask outside.
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 ), Phnom Penh, Cambodia has an air quality index of 153 (Unhealthy). PM2.5 is 55.1 μg/m³ (11.0x the WHO 2021 annual guideline of 5 μg/m³), PM10 56.6 μg/m³, ozone 22.0 ppb, NO2 31.6 ppb. Source: atmos.today (CC-BY-4.0).
Health Guidance
Everyone may begin to experience health effects. Sensitive groups should avoid outdoor exertion. Others should limit prolonged outdoor activity.
Pollutants tracked in Phnom Penh
Each reading is a separate pollutant with its own health profile. Open a guide for sources, WHO thresholds, and exposure tips.
Related to Phnom Penh
- Phnom Penh air quality guide: sources, seasons, health
- Most polluted cities today
- Cleanest cities today
- All Cambodia cities
Phnom Penh air quality - frequently asked
Is the air quality in Phnom Penh safe right now?
Phnom Penh currently has an AQI of 153, classified as Unhealthy. Unhealthy for all - reduce outdoor exposure, wear an N95 mask outside.
What is the PM2.5 level in Phnom Penh?
PM2.5 in Phnom Penh is currently 55.1 μg/m³. WHO guideline is 5 μg/m³ annual / 15 μg/m³ daily. Current level is 11.0x the WHO annual guideline.
Where does Phnom Penh's air pollution come from?
Common sources in urban areas like Phnom Penh: 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 Phnom Penh?
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 Phnom Penh?
Sign up at atmos.today/alerts. Pick a threshold (e.g. AQI > 150). We email you when Phnom Penh's AQI crosses it. Free, no account required.
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