NRW (non-revenue water) is a key performance indicator in the water supply industry. It refers to water that is “lost”, mainly through leaks in the mains, burst pipes and the flushing of mains and pipes, as well as water theft and fire fighting. It is measured as the difference in percentage between the volume of water produced in a year and the actual recorded consumption.
	Since Year 2000, PBAPP has been gradually reducing and controlling the NRW percentage in Penang by 18.2%. A low percentage reflects high efficiency in water supply management. The average NRW percentage for all water supply companies in Malaysia in 2007 was 37.5%.
	In Penang, 1% of NRW is equivalent to 2.72 billion litres of water as at 2008. Based on current production costs, the value of 1% of NRW recovered or saved in Penang is about RM1.7 million. Besides cost savings, efficient NRW management in Penang also helped PBAPP to ensure sufficient supply coverage without the implementation of additional multi-million ringgit water infrastructure projects that would impact water tariffs.
	PBAPP manages the NRW percentage in Penang by adopting technical strategies and methodologies promoted by the International Water Association (IWA).
	To help us manage NRW efficiently, please call 04 509 6 509 or email: customer@pba.com.my immediately when you see a burst pipe or a mains leakage outside your home or along the streets.