Siti Nor Fazillah AbdullahAzimah IsmailHafizan JuahirFathurrahman LanananNor Muzlinda HashimNadiana AriffinTengku Azman Tengku Mohd2024-05-202024-05-202021Abdullah, S. N. F., Ismail, A., Juahir, H., Lananan, F., Hashim, N. M., Ariffin, N., & Mohd, T. A. T. (2021). Estimation of rainwater harvesting by the reflectance of the purity index of rainfall. Environmental Science and Pollution Research, 28, 35613-35627.https://repoemc.ukm.my/handle/123456789/1368Rainwater harvesting is an effective alternative practice, particularly within urban regions, during periods of water scarcity and dry weather. Thecollected waterr is mostly utilized for non-potable household purposes and irrigation. However, due to the increase in atmospheric pollutants, the quality of rainwater has gradually decreased. This atmospheric pollution can damage the climate, natural resources, biodiversity, and human health. In this study, the characteristics and physicochemical properties of rainfall were assessed using a qualitative approach. The three-year (2017-2019) data on rainfall in Peninsular Malaysia were analysed via multivariate techniques.enAtmospheric pollutantPhysicochemicalRain gauge stationsRainwater harvestingPurity of rainfall indexJournal