An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Indoor Air Quality (IAQ)

Appendix A of the Building Air Quality Guide: Common Indoor Air Quality Measurements - A General Guide

Appendix A of the Building Air Quality guide contains brief introduction to making measurements that might be needed in the course of developing an IAQ profile or investigating an IAQ complaint.

Topics include:

  • Overview of Sampling Devices
  • Simple Ventilation/Comfort Indications
  • Air Contaminant Concentrations
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.