Quick answer
Is the air quality good in Rio de Janeiro right now? Rio de Janeiro, Brazil currently has an Air Quality Index of 179, classified as Unhealthy. PM2.5 is 41.7 μg/m³ (8.3x 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 ), Rio de Janeiro, Brazil has an air quality index of 179 (Unhealthy). PM2.5 is 41.7 μg/m³ (8.3x the WHO 2021 annual guideline of 5 μg/m³), PM10 42.0 μg/m³, ozone 98.0 ppb, NO2 37.6 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 Rio de Janeiro
Each reading is a separate pollutant with its own health profile. Open a guide for sources, WHO thresholds, and exposure tips.
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Rio de Janeiro air quality - frequently asked
Is the air quality in Rio de Janeiro safe right now?
Rio de Janeiro currently has an AQI of 179, classified as Unhealthy. Unhealthy for all - reduce outdoor exposure, wear an N95 mask outside.
What is the PM2.5 level in Rio de Janeiro?
PM2.5 in Rio de Janeiro is currently 41.7 μg/m³. WHO guideline is 5 μg/m³ annual / 15 μg/m³ daily. Current level is 8.3x the WHO annual guideline.
Where does Rio de Janeiro's air pollution come from?
Common sources in urban areas like Rio de Janeiro: 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 Rio de Janeiro?
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 Rio de Janeiro?
Sign up at atmos.today/alerts. Pick a threshold (e.g. AQI > 150). We email you when Rio de Janeiro's AQI crosses it. Free, no account required.
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