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
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Get results for ending: Now At: -- at :00
New! Beijing smog forecast from banshirne.com
Next time with good air: Wed 09-20 at 02:00
Next morning with clean air: Tue 09-26
Last updated at 2017-09-19 14:00 EDT

More complete forecast information can be found at aqicn.org


City:
Scale: US China What does this mean?


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

 

Beijing Results from 2008-06-19 00:00 to 2008-06-20 00:00

Hours: 25 Readings: 25 Average: 237.40 High: 265 Low: 201

Summary
< 0 (no reading)
0.00% (0)

< 50 (Good)
0.00% (0)

< 100 (Moderate)
0.00% (0)

< 150 (Heavy)
0.00% (0)

< 200 (Unhealthy)
0.00% (0)

< 300 (Very unhealthy)
100.00% (25)

< 500 (Hazardous)
0.00% (0)

< 9999 (Crazy bad)
0.00% (0)

2008-06-20 00:00
221

2008-06-19 23:00
256

2008-06-19 22:00
263

2008-06-19 21:00
249

2008-06-19 20:00
256

2008-06-19 19:00
248

2008-06-19 18:00
265

2008-06-19 17:00
230

2008-06-19 16:00
235

2008-06-19 15:00
217

2008-06-19 14:00
228

2008-06-19 13:00
240

2008-06-19 12:00
258

2008-06-19 11:00
263

2008-06-19 10:00
244

2008-06-19 09:00
241

2008-06-19 08:00
242

2008-06-19 07:00
230

2008-06-19 06:00
229

2008-06-19 05:00
239

2008-06-19 04:00
236

2008-06-19 03:00
227

2008-06-19 02:00
214

2008-06-19 01:00
203

2008-06-19 00:00
201


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.