Yousry Ghazaw, Tarek Elmitwalli and Abdul Razzaq Ghumman
Water scarcity is one of the most sensitive issues of this century. Several countries are posed with the same problem of water scarcity in the Kingdom of Saudi Arabia (KSA). Thus, an optimal use of various water resources, including rainwater, is extremely crucial. However, the quality of water needs to be assessed before any usage. The present study investigated the quality of rainwater in the Qassim region of KSA. The building of Civil Engineering Department, College of Engineering, Qassim University, Buraidah was selected as the experimental site. The rainwater from the roof of the department was periodically collected in from October 2011 to July 2012. The harvested rainwater was assessed for the quality and accordingly treated physically and chemically. First, the collected water was pumped onto a filter paper column, type POSI-FLO ® II, to remove the large particles. Subsequently, four cartridge filters with different filter media, followed by reverse osmosis unit, were used for the treatment. The experimental results demonstrated that the characteristics of the harvested and treated rainwater from the rooftops of building in Buraidah could be used for drinking.