ETCOS Environmental and Industrial Hygiene we work with clients in Markham, Mississauga, the Greater Toronto Area and Southwestern Ontario to help you maintain workplace health and safety. We have successfully served all types of industry and business with the utmost quality and reliability. We strive to cost-effective solutions, saving your company time and money. If you have any questions about the services we provide, feel free to contact us. You can also complete our eform and a member of our staff will promptly attend to your inquiry.