N U M NizamM M HanafiahM B MokhtarN A Jalal2024-05-202024-05-202021Nizam, N. U. M., Hanafiah, M. M., Mokhtar, M. B., & Jalal, N. A. (2021). Water quality of rooftop rainwater harvesting system (MyRAWAS). In IOP Conference Series: Earth and Environmental Science (Vol. 880, No. 1, p. 012039). IOP Publishing.https://repoemc.ukm.my/handle/123456789/1323This study was conducted to determine the quality of rainwater harvested collected directly from rooftop. The quality of the rooftop rainwater was taken in three consecutive months and the water quality for before and after treatment was measured and compared. Commercial activated carbon was used to treat the rainwater obtained from the rooftop. The water quality was compared with the Water Quality Index (WQI) and the National Water Quality Standards (NWQS). The parameters involved are pH, temperature, conductivity, dissolved oxygen (DO), total suspended solids (TSS), ammoniacal nitrogen (NH3-N), biochemical oxygen demand(BOD), chemical oxygen demand (COD), E.coli and total coliform bacteria.enRainwater harvesting systemWater qualitySustainable water resourceMyRAWASMalaysiaJournal