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The Local Air Quality Index - Brazil

The Local Air Quality Index is a method used by the government and companies to communicate air quality in an understandable way.

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How we calculate the air quality index - Brazil

BreezoMeter uses an index called “AQI (BR)”

1

We take the average of each pollutant type according to local government definitions.

2

An official conversion table is used to convert average pollutant concentrations to AQI for each pollutant.

3

The final AQI is determined by taking the worst AQI among all pollutants. The worst pollutant being the dominant pollutant.

Index Health Categories

AQI (BR) represents air quality levels according to the following health categories:

Category

AQI

N1 – Good air quality

0 to 40

N2 – Moderate air quality

41 to 80

N3 – Bad air quality

81 to 120

N4 – Very bad air quality

121 to 200

N5 – Poor air quality

>200

Pollutant Type

Period

pm2.5

24h avg.

pm10

24h avg.

o3

8h avg.

so2

24h avg.

no2

1h avg.

co

8h avg.

Index Pollutant Types

The following chart displays the pollutants that are part of the AQI (BR) calculation and the timeframe taken to average each pollutant type:

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Air Quality Indexes Around The Globe

Explore the local air quality indexes BreezoMeter uses in various countries.