George, most of the answers ...
Published by Bright Piyo, Zone Manager
George, most of the answers here are correct. In summary the difference between NRW and UFW is that NRW consists of known and unknown water consumption that are not billed/invoiced/can not be paid for while UFW costs of unknow water consumption only. You can google and read further work on the same from Sharma (2008) as well as Sharma (2014) that clearly define and illustrate the two.