Assessment, Monitoring, and Reduction Strategy Development for Non- Revenue Water (NRW) of Calamba Water District (CWD), Calamba City, Laguna, Philippines

Abstract

NRW is a portion of water supply that is lost and consequently, a wasted revenue for water distributor. This study develop reduction strategies of NRW in CWD through the assessment of the company’s operating practices by conducting interviews and determining the relationships between the real loss and the range of variation of pressure, and between the apparent loss and the number of service connections using simple linear regression method. Results shows that significant relationship was only shown between the number of service connections and apparent losses. Furthermore, the apparent losses came from the number of service connections is the highest contributor of water loss. Hence, the recommended reduction plans are to start and monitor the record of the age of infrastructure, to manage inaccurate meter readings, to establish a water meter repair and replacement program, and to have a regular monitoring for water theft to address the problems in NRW. Finally, it is also recommended to establish a new department that focuses in NRW reduction through standardizing zones and areas for assessment and monitoring purposes.