Rural Water Supply and Sanitation Agency (RUWASA) Jobs in Tanzania. The Rural Water Supply and Sanitation Agency (RUWASA) is a newly established agency responsible for the development and sustainable management of water supply and sanitation projects and water service delivery in rural areas. The agency has been established by the new Water Supply and Sanitation Act No. 5 of 2019, which becomes effective on 01 July 2019. The Permanent Secretary of the Ministry of Water invites qualified candidates to apply for the position of Director General of RUWASA.