There is currently no regulatory standard for indoor volatile organic compound (VOC) levels in commercial indoor environments. However, the WELL Building Institute created "Air" parameters utilizing the National Ambient Air Quality Standards (NAAQS) set by the EPA and air quality guidelines set by the World Health Organization (WHO), ASHRAE, and the LEED program. The WELL Institute's "Air" parameters evaluate 29 criteria, including VOC reduction, ventilation effectiveness, air filtration, and smoking prohibition.