ANALYSIS OF LOSS WATER ON PIPE DISTRIBUTION ”NON REVENUE WATER (NRW)” NETWORK PDAM SURYA SEMBADA CITY OF SURABAYA WITH CAUSAL LOOP DIAGRAM (CLD): ANALYSIS OF LOSS WATER ON PIPE DISTRIBUTION ”NON REVENUE WATER (NRW)” NETWORK PDAM SURYA SEMBADA CITY OF SURABAYA WITH CAUSAL LOOP DIAGRAM (CLD). Tibuana. 2018;1(1):24-33. doi:10.36456/tibuana.1.1.1587.24-33