The World Air Quality Index project Data Use Statement applies to data available from the data platform. The purpose of these guidelines is to make all interested parties aware of the nature and objective of the data.

1. Usage Statement
   1. The data platform observational data are not fully verified or validated; these data are subject to change, error, and correction. The data and information are in no way official.
   2. The data platform observational data can not be used for any official comparison, ranking, report or data analysis. The official and validated data must be obtained directly from the originating EPA.
   3. If observational data are used for analyses, displayed on web pages, or used for other programs or products, the analysis results, displays, or products must indicate that these data are not fully verified or validated.
   4. Publications, analyses, products, presentations, and/or derived information that rely on these data must give attribution to the originating EPA as well as the World Air Quality Index Project:
   5. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data. All this historical Air Quality data is based on unvalidated, and due to quality assurance these data may be amended, without notice, at any time.
   6. Data and information reported by the World Air Quality Index project are provided for the express purpose of providing citizens actionable health information related to air pollution.
2. Additional Restrictions
   1. The data can not be sold or included in sold packages.
   2. The data can not be used in paid applications or services.
   3. The data can not be redistributed as cached or archived data.

A copy of this terms of service can be found at aqicn.org/data-platform/tos/.