Beijing Air Quality: pm2.5

NEW: How did 2015 compare with the previous five years?
Even with a bad November and December Beijing's average dropped from 158 to 142!
5 of the 10 months with the lowest average AQI occured in 2015!

NEWER: Generate your own charts with the new chart page
Want to contact me? Use the new mail form

Get results for ending: Now At: -- at :00
New! Beijing smog forecast from banshirne.com
Next time with good air: Tue 02-28 at 11:00
Next morning with clean air: Wed 03-01
Last updated at 2017-02-26 18:00 EST

More complete forecast information can be found at aqicn.org

Android App! My (un)employment situation has given me both time to program my own stuff and an impetus to work on new things to enhance my experience. To learn about Android programming I made an app for displaying the most recent readings on an Android phone. I am not going to release it officially, but will make the debug version available here if anyone cares to download it. You can also preview it online.


City:
Scale: US China What does this mean?
Automatic refresh:


Data for previous years can be accessed in csv form from the summary pages

 

Beijing Results from 2017-02-26 07:00 to 2017-02-27 07:00

Hours: 25 Readings: 25 Average: 110.36 High: 185 Low: 57

Summary
< 0 (no reading)
0.00% (0)

< 50 (Good)
0.00% (0)

< 100 (Moderate)
52.00% (13)

< 150 (Heavy)
24.00% (6)

< 200 (Unhealthy)
24.00% (6)

< 300 (Very unhealthy)
0.00% (0)

< 500 (Hazardous)
0.00% (0)

< 9999 (Crazy bad)
0.00% (0)

2017-02-27 07:00
169

2017-02-27 06:00
180

2017-02-27 05:00
185

2017-02-27 04:00
176

2017-02-27 03:00
176

2017-02-27 02:00
158

2017-02-27 01:00
129

2017-02-27 00:00
139

2017-02-26 23:00
147

2017-02-26 22:00
129

2017-02-26 21:00
119

2017-02-26 20:00
112

2017-02-26 19:00
82

2017-02-26 18:00
82

2017-02-26 17:00
74

2017-02-26 16:00
78

2017-02-26 15:00
78

2017-02-26 14:00
66

2017-02-26 13:00
59

2017-02-26 12:00
57

2017-02-26 11:00
74

2017-02-26 10:00
66

2017-02-26 09:00
78

2017-02-26 08:00
72

2017-02-26 07:00
74


Wired had an article about how the US Embassy AQI tweets helped speed up China's monitoring and addressing its pollution problem. I'd like to think my page also helped.
The original purpose of this site was to save historical data, which at the time the US Embassy did not supply. A while ago they started making it available too. The site is stateair.net. They have some explicit restrictions and limitations on use of their data.


More information on my site can be found here, or visit my main site. That page also has links where you can get history updates or link to a graphics label that can be put on web pages. And, for ubuntu users, there is an app that shows the current API in the top bar.

PM2.5 measurements are commonly given in 2 different units, ug/m3 and AQI. The difference between them is explained here, and here is a calculator that will let you convert one to the other. AQI only goes up to 500, what do those "crazy bad" readings mean?

Here is a story about a guy who has another, more qualitative way to show the data: every day he takes a picture of the same scene outside his window. His blog (in Chinese) is at http://weibo.com/u/1000481815.

Daily 2014 images

Daily 2015 images

Does not work well with IE, but does with Chrome, Firefox, and Opera - and I don't care about IE.