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Air Quality Monitoring Statistics - Annual Summary

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Air Quality Monitoring Statistics - Annual Summary

Year 2021

Air Quality
Monitoring Station

Annual Mean
Concentration [1]

Range of Monthly Mean
Concentration [1]

Sulphur Dioxide (SO2)

Victoria Peak

4

1-12

Chung Hum Kok

3

0-5

Victoria Road

1

0-3

Pok Fu Lam

5

1-10

Ap Lei Chau

1

0-4

Cheung Chau

3

0-8

Nitrogen Dioxide (NO2)

Victoria Peak

14

7-28

Chung Hum Kok

13

7-22

Victoria Road

10

6-16

Pok Fu Lam

22

9-42

Ap Lei Chau

16

9-30

Cheung Chau

21

11-40

Year 2020

Air Quality
Monitoring Station

Annual Mean
Concentration [1]

Range of Monthly Mean
Concentration [1]

Sulphur Dioxide (SO2)

Victoria Peak

2

0-5

Chung Hum Kok

4

0-6

Victoria Road

1

1-2

Pok Fu Lam

3

1-10

Ap Lei Chau

1

0-3

Cheung Chau

5

1-11

Nitrogen Dioxide (NO2)

Victoria Peak

12

7-23

Chung Hum Kok

12

8-21

Victoria Road

12

7-19

Pok Fu Lam

23

10-42

Ap Lei Chau

14

7-29

Cheung Chau

22

7-43

Year 2019

Air Quality
Monitoring Station

Annual Mean
Concentration [1]

Range of Monthly Mean
Concentration [1]

Sulphur Dioxide (SO2)

Victoria Peak

3

2-7

Chung Hum Kok

1

0-5

Victoria Road

2

0-10

Pok Fu Lam

4

1-8

Ap Lei Chau

3

1-4

Cheung Chau

3

0-8

Nitrogen Dioxide (NO2)

Victoria Peak

13

9-18

Chung Hum Kok

10

4-17

Victoria Road

14

10-21

Pok Fu Lam

25

13-51

Ap Lei Chau

13

7-31

Cheung Chau

27

12-54

Notes:
[1] All pollutant units are in micrograms per cubic metre.