Data provided by http://twitter.com/beijingair

The data used by this application 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. We sometimes see "missed" hours each day (from 1 to multiple days) where the data we retrieve is empty. This is normal...please be patient.

THANKS: We would like to give a big thanks to the person maintaining the monitor and data feed...whoever you are.

The scale and thresholds are based on the U.S. EPA standards at airnow.gov

Good	0-50
Moderate	51-100
Unhealthy for Sensitive Groups	101-150
Unhealthy	151-200
Very Unhealthy	201-300
Hazardous	>300

USE AT YOUR OWN RISK. We are not responsible for any bad descisions you make by using data from this application. Because the data is provided by an anonymous 3rd party (not involved with this application), we can make no guarantee of quality, accuracy, stability, update frequency or future existence of this data. Also note that these numbers may be different than other numbers reported by government agencies whose monotoring stations are located in different parts of the city.

© 2009 Code Gemini / Dave Black.