Page last updated at 06:16 GMT, Sunday, 24 August 2008 07:16 UK

In pictures: Beijing pollution-watch

Composite image of contrasting days

The BBC is sampling pollution levels in Beijing before and during the Olympics. The daily readings measure air particles known as PM10. The error margin is 20%.

General view from testing point

26 August PM10 reading: 93 micrograms per cubic metre. (The World Health Organisation guideline maximum is 50 micrograms per cubic metre, averaged over 24 hours.)

General view from testing point

25 August PM10 reading: 70 micrograms per cubic metre. We test for 10 minutes at midday from a seventh floor balcony in central Beijing.

General view from testing point

24 August PM10 reading: 99 micrograms per cubic metre.

General view from testing point

23 August PM10 reading: 12 micrograms per cubic metre.

General view from testing point

22 August PM10 reading: 21 micrograms per cubic metre.

General view from testing point

21 August PM10 reading: 56 micrograms per cubic metre.

General view from testing point

20 August PM10 reading: 87 micrograms per cubic metre.

General view from testing point

19 August PM10 reading: 39 micrograms per cubic metre.

General view from testing point

18 August PM10 reading: 18 micrograms per cubic metre. Blue skies over Beijing after a hazy Sunday.

General view from testing point

17 August PM10 reading: 54 micrograms per cubic metre.

General view from testing point

16 August PM10 reading: 7 micrograms per cubic metre. (The World Health Organisation guideline maximum is 50 micrograms per cubic metre, averaged over 24 hours.)

General view from testing point

15 August PM10 reading: 12 micrograms per cubic metre.

General view from testing point

14 August PM10 reading: 46 micrograms per cubic metre.

General view from testing point

13 August PM10 reading: 128 micrograms per cubic metre.

General view from testing point

12 August PM10 reading: 41 micrograms per cubic metre.

General view from testing point

11 August PM10 reading: 54 micrograms per cubic metre.

General view from testing point

10 August PM10 reading: 278 micrograms per cubic metre.

General view from testing point

9 August PM10 reading: 110 micrograms per cubic metre.

General view from testing point

8 August PM10 reading: 156 micrograms per cubic metre.

General view from testing point

7 August PM10 reading: 191 micrograms per cubic metre.

General view from testing point

6 August PM10 reading: 186 micrograms per cubic metre.

General view from testing point

5 August PM10 reading: 104 micrograms per cubic metre.

General view from testing point

4 August PM10 reading: 292 micrograms per cubic metre.

General view from testing point

3 August PM10 reading: 79 micrograms per cubic metre.

General view from testing point

2 August PM10 reading: 15 micrograms per cubic metre.

General view from testing point

1 August PM10 reading: 19 micrograms per cubic metre.

General view from testing point

31 July PM10 reading: 56 micrograms per cubic metre.

General view from testing point

30 July PM10 reading: 78 micrograms per cubic metre.

General view from testing point

29 July PM10 reading: 8 micrograms per cubic metre.

General view from testing point

28 July PM10 reading: 134 micrograms per cubic metre.

General view from testing point

27 July PM10 reading: 269 micrograms per cubic metre.

General view from testing point

26 July PM10 reading: 165 micrograms per cubic metre.

General view from testing point

25 July PM10 reading: 261 micrograms per cubic metre.

General view from testing point

24 July PM10 reading: 254 micrograms per cubic metre.



SEE ALSO
Beijing pollution: Facts and figures
11 Aug 08 |  Asia-Pacific


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