This page would be updated when needed. （Last update at 2013/04/22.）
Section A: Analysis of 2012.
Here are total 214 days (photos) for the year 2012 as the sampling rate is 58.47%.
In these 214 days:
Unhealthy for sensitive group: 11%;
Very unhealthy: 13%;
No data: 9%.
Section B: Analysis by quarter of 2012.
The sampling rates by quarter of 2012 (from 2012/03 to 2013/02):
Here is the analysis by quarter of 2012 (from 2012/03 to 2013/02):
The average PM2.5 in 2012 is 156.6; by quarters:
- The data used by this website comes from the U.S. Embassy via Twitter feed –BeijingAir. The description at Twitter indicates that the data comes from a MetOne BAM 1020 particle monitor located in NE Chaoyang District.
- Air quality index as below (from –AirNow.gov):