ABSTRACT
Water quality data from a water treatment plant which utilises river water as the raw water are available for two and a half years. The treatment facility consists of a rapid sand and slow sand filtration units and the filtered water from slow sand filtration joins with the recharging water from the stream. This water is disinfected before being used for transmission to water distribution network. The data regarding the overall system efficiency as well as its components are analysed to assess their performance with varying climatic conditions, viz. temperature. It has been found that the performance of slow sand filters is sensitive to temperature when compared to rapid sand filtration units and plays an important role to the overall quality of treated water.
