You too can monitor your own Air Quality and publish the real-time data, for free, on the aqicn.org and waqi.info maps and websites.

All you need is one of our affordable air quality monitoring stations.
Want to know more? Click for more info.

Term of Service

The usage of the programmatic API are subjected to a "acceptable usage" policy:

The default quota is 1,000 (one thousand) requests per second.
(Yes, that's a lot, and that's thanks to the support from our colleagues at the UNEP).

(where data refers to the data obtained from the APIs)
For the historical data, check the data platform page.

Attribution to the World Air Quality Index Project as well as originating EPA is mandatory.
Public usage by for-profit corporations requires explicit agreement wit the World Air Quality Index team.
Public usage by non-profit organization requires prior notification (by email) to the World Air Quality Index team.

(where app refers to any application, services which make use of the above mentioned data)

If the above policy does not fulfill your needs, or if you need larger quota, then please contact us first.

Please note that the we reserve the right to change the term of service at any time and without prior notice.

Warranty

All reasonable measures have been taken to ensure the quality and accuracy of the Data provided by the above APIs. However:

We do not make warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, correctness, completeness of the information.
We do not assume any legal liability or responsibility for any damage or loss that may directly or indirectly result from any information contained on this website or any actions taken as a result of the content of this website;

About the Air Quality Levels

AQI	Air Pollution Level	Health Implications	Cautionary Statement (for PM2.5)
0 - 50	Good	Air quality is considered satisfactory, and air pollution poses little or no risk	None
51 -100	Moderate	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.	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150	Unhealthy for Sensitive Groups	Members of sensitive groups may experience health effects. The general public is not likely to be affected.	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200	Unhealthy	Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects	Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300	Very Unhealthy	Health warnings of emergency conditions. The entire population is more likely to be affected.	Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+	Hazardous	Health alert: everyone may experience more serious health effects	Everyone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check www.myhealthbeijing.com blog.