Many of 8.5M people living in the Indonesian capital Jakarta suffer from inadequate and poorly maintained infrastructure, including water supply drainage, sewerage and flood protection.
In the eastern region of the city piped water reaches about 62% of the 4.1M residents, with the remainder relying on a variety of water sources including groundwater and vendors. The government owned 60km long West Tarum Canal conveys raw water for treatment and supply.
Mott MacDonald has just completed a water supply masterplan for the eastern region of the city, working for client Thames Pam Jaya (TPJ). The source-to-tap plan covers water resources, water demands, production and distribution system development to the year 2023.
In most other cities in Indonesia infrastructure investment has been minimal since the country's financial crisis of 1998. But people in Jakarta have seen investment to expand and rehabilitate the water supply systems by private sector water system operators, including 650km of new pipes and 60,000 new connections in TPJ's concession area.
An assessment of performance has identified future priorities as boosting pressure and improving reliability of supply in parts of the distribution system; seeking more support from the regulatory body to improve reliability and water quality in the West Tarum Canal; and the environmentally sensitive disposal of waste from water treatment plants.
Surprisingly, most customers responding to a survey, even those in the poorest areas, said they would be willing to pay more for the present service and improvements Annual investment of around £13M in water production improvements, network and service expansion, rehabilitation, and business support systems is required to implement the next five year (2003-2007) part of the plan. This would deliver around 80km of new primary distribution mains, more than 1,000km of secondary mains and 100,000 new connections.