Thanks to Michael Wester I discovered this site:
http://www.amfic.eu/index.php
And their “air quality bulletin” – you can select Location, etc.
http://www.amfic.eu/bulletin/index.php
Seems they have terrific information on air quality. I will need to keep a close eye.
Another one I will explore further but looks interesting:
http://www.myhealthbeijing.com (by Richard Saint Cyr)
I will need to study those and fine-tune my overviews on Beijing pollution.