The School of Environmental Science and Technology is a predecessor of the Environmental Engineering Department, which in turn is a predecessor of the Department of Public Health Engineering of Ardhi Institute, which was offering, advanced diploma in Public Health Engineering (PHE). The PHE course which was offered from 1981 to 1989 was established as a reaction by the Government of Tanzania against deteriorating urban infrastructure, which started in early 1970s. The poor urban infrastructure services were noted to endanger public health and this notion was attested by a major cholera epidemic in the 1970s. The profession was also established as an integral and crucial entity in the implementation of the International Drinking Water Supply and Sanitation Decade (IDWSSD) of 1980 - 1990. The PHE course produced professionals with competence in engineering and public health as well as other sciences, which are essential for planning, designing, implementing and operating as well as maintaining urban infrastructure to prevent them from becoming routes for public health harm and environmental damage. Thus, the public health engineers were trained in traditional basic engineering disciplines and physical, chemical and biological sciences. Over the years the original public health engineering curriculum was modified to keep abreast with changing socio-economic, environmental and public health challenges and needs. In line with the changes in the thrust of the department, in 1989 the Public Health Engineering department was transformed into Environmental Engineering (EE) Department. Parallel to the changes in the curriculum was the institutional transformation of the Institute to a constituent college to a full-fledged university. In 1996, Ardhi Institute was transformed into a Constituent College of the University of Dar es Salaam (University College of lands and Architectural Studies, UCLAS) and in 2007 UCLAS became an independent university called Ardhi University under which the School of Environmental Science and Technology was established.