Currently PDAM Tirta Moedal Semarang City only serves 167,979 customers or 1,010,806 residents, about 62.02% of the total population of Semarang City. The necessity of clean water can be seen from surveys showing that the population's interest in PDAM services is quite high, reaching 85%. However, this is constrained by the PDAM's water production which cannot be increased due to the limited water production capacity from the current SPAM facility.
Given the limited current production capacity and in order to achieve the service level target of 90%, one of the efforts made by the Semarang City Government together with PDAM Tirta Moedal is to build and develop the Water Supply System of West Semarang (SPAM West Semarang) in the the scheme of Government Cooperation with Business Entity which called as Public Private Partnership (known as KPBU).