Occupational Hygiene

American Industrial Hygiene Association - The AIHA is "..dedicated to the anticipation, recognition, evaluation, and control of environmental factors arising in or from the workplace that may result in injury, illness, impairment, or affect the well-being of workers and members of the community."
http://www.aiha.org/

International Occupational Hygiene Association (IOHA) - Provides an international voice of the occupational hygiene profession through its recognition as a non-governmental organization (NGO) by the International Labour Organization and the World Health Organization. Conducts a wide range of activities intended to promote and develop occupational hygiene worldwide.
http://www.ioha.com/

British Occupational Hygiene Society (BOHS) - "The aim of the Society is to promote the science of occupational hygiene by raising awareness of the value of the speciality through education, information exchange, research and professional networking."
http://www.bohs.org/

ACGIH - An association of health and safety professionals devoted to protecting the health of the American worker and the environment. It supports the industrial hygiene profession in the anticipation, recognition, evaluation, and control of job-site hazards that may result in injury, illness, to workers.
http://www.acgih.org/