Beijing RH 9.1.2015
This map was published in NYTimes. It uses the data of a popular website in China (aqicn.org), that provides real-time AQI.
Beijing RH 8.24.2015:
Both, the Ministry of Environmental Protection (MEP) and Beijing Municipal Environmental Monitoring Center (BJMEMC) release official online data (in Chinese) in the following links: BJMEMC MEP data center
The first contains a bigger picture of Beijing, including several towns and districts.
This map was published in NYTimes. It uses the data of a popular website in China (aqicn.org), that provides real-time AQI.
Beijing RH 8.24.2015:
Both, the Ministry of Environmental Protection (MEP) and Beijing Municipal Environmental Monitoring Center (BJMEMC) release official online data (in Chinese) in the following links: BJMEMC
MEP data center
The first contains a bigger picture of Beijing, including several towns and districts.
However, a better visualization (in English) can be found in independent websites which include AQI from monitoring stations of official sources and the US Embassy:
http://aqicn.org/city/beijing
http://aqicn.org/city/beijing/us-embassy/