American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE)
www.ashrae.org

American Industrial Hygiene Association (AIHA)
www.aiha.org

American Lung Association
www.lungusa.org

American Conference of Governmental Industrial Hygienists, Inc. (ACGIH)
www.acgih.org

Environmental Protection Agency (EPA)
www.epa.gov

National Institute for Occupational Safety and Health (NIOSH)
www.cdc.gov/niosh/homepage.html