Beijing Air Quality Data

This page contains a graph of Beijing’s current air quality index for the last 24 hours, by hour.  Data is pulled from the Twitter feed of BeijingAir, the twitter handle for the pm2.5 smog measurements published by the US Embassy in Beijing.  The 24-hour graph is updated 15 minutes after every hour.  Just refresh the page to see the updated index.

The monitoring station at the US Embassy in Beijing measures the average of “less than 2.5 micra” sized particles every hour.  This component of air pollution is believed by the EPA to be some of the most damaging, as it can cross the lung barriers and enter the blood stream.

24 Hour Air Quality Index Graph – US EPA AQI Defined Ranges

Next Hourly Update Expected in: 33 minutes 38 seconds

*Additional Beijing graphs for different time periods are available.  If you want to purchase historical index graphs for other periods or even raw data to do your own analysis, please use the Contact Page to describe what graphs or data you desire.

If you want to print this information (to take to your doctor, or whomever), then click to Print This Page.  We do want you to know if you are healthy enough to breath in Beijing, or if you should take special precautions.  Lastly, if the information and index graph on this page have helped you, please share it on Facebook, Twitter, and other social media.  Get the word out!

The 24-hour graph above attempts to update 15 minutes after the hour.  The new hourly index data for Beijing typically gets tweeted 10 minutes after the hour, but occasionally it is late.  If the the new 60 minute readings are not on Twitter when the system checks at 15 past the hour, the system will check again every 15 minutes.

Beijing index data is listed from the oldest on the left to the newest hourly readings on the right. Only the last 24 hours of readings are shown on this graph.

This data only comes from only one Beijing monitoring station.  Overall Beijing city air quality cannot be derived from just this one monitoring station.  The index values on the graph represent the approximate pollution level in the area around the US Embassy (about 8 miles northeast of the Forbidden City).  If you want to see the actual raw index information, you will find the raw BeijingAir Twitter readings at

Interpreting the Readings (Using AQI Colors and Descriptions)

  • GoodAQI of Equal to or Less than 50 ( <= 50 )
    Air quality is considered satisfactory, and air pollution poses little or no risk.
  • Moderate – AQI of 51 to 100
    Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
  • Unhealthy for Sensitive Groups – AQI of 101 to 150
    Members of sensitive groups may experience health effects. The general public is not likely to be affected.
  • Unhealthy – AQI of 151 to 200
    Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
  • Very Unhealthy – AQI of 201 to 300
    Health warnings of emergency conditions. The entire population is more likely to be affected.
  • Hazardous – AQI of Greater than 300 ( > 300)
    Health alert: everyone may experience more serious health effects.

*Information summarized from the US Air Quality Index Guide.

References and Additional Information

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