Addis Ababa Water and Sewerage Authority (AAWSA) : It was since 1893 E.C (1900 G.C.) that piped water service was started in Addis Ababa. In the beginning the provision of potable water was delegated to the then Ministry of Works. And following the defeat of Fascist Italian invaders in 1934, this responsibility was transferred to the newly re-established Municipal Office.
In order to cater for the increasingly growing demand for water and waste water disposal services there did arise a need for the establishment of an autonomous body that would primarily focus on the provision of the services. Accordingly, Addis Ababa Water and Sewerage Service Authority was set up as per proclamation No. 68/1963, in 1963 E.C. (1971G.C.). And in 1987 E.C. (1995 G.C.) additional powers were invested on the authority, while being reestablished with a slightly different name, i.e., Addis Ababa Water and Sewerage Authority (AAWSA).