United States of America - www.airnow.gov
 
Canada - www.airnow.gov/canadamaps
 
United Kingdom - www.airquality.co.uk
 
France - www.airparif.asso.fr
 
Germany - www.env-it.de
 
Australia - www.epa.nsw.gov.au
 
Japan - w-soramame.nies.go.jp(Japanese)
 
China - www.zhb.gov.cn