This zone is formed by three regions which are Dar es Salaam, Pwani and Morogoro. Its main offices are in the commercial city of Dar es Salaam with a sub-office in Morogoro. The dominant economic activities in this zone fall under the industries and trade sector. As such, OSHA operations in this zone are mainly designed to enhance safety and health for people involved in manufacturing processes as well as other business undertakings. The key feature of this zone is that it hosts over 80 percent of workplaces registered by OSHA.