This SAE Aerospace Information Report (AIR) covers airborne particulate contaminants that may be present in commercial aircraft cabin air during operation. Discussions cover sources of contaminants, methods of control and design recommendations. Air quality, ventilation requirements and standards are also discussed. This document covers design information regarding particulate contaminants in commercial aircraft. This document provides information on Environmental Control System (ECS), particulate contamination (solid and liquid phases), bleed and recirculated air and control methods including ventilation used to design and maintain cabin air environments.