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The Local Air Quality Index - Hong Kong

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 - Hong Kong

BreezoMeter uses an index called “AQHI (HK)”

1

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

2

A scientific formula is used to calculate the AQHI for Hong Kong based on 4 different pollutants (PM2.5/PM10, O3, NO2 and SO2).

Index Health Categories

AQHI (HK) represents air quality levels according to the following health categories:

Category

AQI

Low air pollution

1 to 3

Moderate air pollution

4 to 6

High air pollution

7

Very high air pollution

8 to 10

Serious air pollution

+10

Pollutant Type

Period

pm2.5

3h avg.

pm10

3h avg.

o3

3h avg.

so2

3h avg.

no2

3h avg.

Index Pollutant Types

The following chart displays the pollutants that are part of the AQHI (HK) 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.