Air Quality Index (AQI) in Brazil 🇧🇷

Live Air Quality Index (AQI) and PM2.5 Levels in Brazil

Currently, the Air Quality Index (AQI) in Brasilia, the capital of Brazil, is measured at a score of 77. According to the US EPA health standard, this air quality rating is categorized as Moderate. The current atmosphere in Brasilia is influenced by a PM2.5 (fine particulate matter) concentration of 22.8 µg/m³ and PM10 levels recorded at 24.3 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 44.6 µg/m³.

Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Brazil based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like São Paulo, Rio de Janeiro, Belo Horizonte, Salvador and Fortaleza. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.

Air Quality Snapshot: Brazil Right Now

Across 100 monitored cities in Brazil, live air quality currently ranges from a low of 14 AQI in Pelotas (the cleanest air right now) to a high of 171 AQI in Piracicaba (the most polluted). By US EPA health band, the nationwide distribution stands at 25 Good, 48 Moderate, 17 Unhealthy for Sensitive Groups, 10 Unhealthy. The average fine-particulate (PM2.5) concentration across these cities is 23.0 µg/m³ — approximately 4.6 times the World Health Organization (WHO) annual air quality guideline of 5 µg/m³.

Brazil Air Quality: Major Cities Index

Pollution Monitor & AQI Forecast: Brazil Regions

* Air Quality Index (AQI) data for Brazil is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.

What Today's Readings Mean in Brazil

The median reading across 100 monitored cities is 58.5 AQI. The national spread is 157 points, from 14 in Pelotas to 171 in Piracicaba. Average PM2.5 is 23.0 µg/m³ (4.6× the WHO annual guideline).

At least one monitored location is Unhealthy. Reduce prolonged outdoor exertion and check the city reading before planning exercise or travel.

See the complete AQI and pollutant reference scales

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

Air Quality in Brazil — FAQ

Common questions about AQI levels, pollutants, and data sources for Brazil.

What is the current air quality in Brazil?

Live AQI readings for 100 city(ies) across Brazil are listed above on the US EPA 0-500 scale.

Where does Brazil's AQI data come from?

Real-time readings come from ground-based monitoring stations operated by national environmental agencies in Brazil, delivered via WeatherAPI.com and aggregated using the EPA AQI formula.

What is a healthy AQI value in Brazil?

On the EPA scale used worldwide, 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for sensitive groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and 301-500 is Hazardous. The WHO 24-hour PM2.5 guideline is 15 μg/m³.

Why do AQI readings vary between cities in Brazil?

Air quality is highly local — major pollution sources (traffic, industry, dust, wildfires) cluster around cities, while wind direction and topography move them around. Comparing nearby readings on this page is the best way to see how conditions change across Brazil.