Activated carbon filters can improve water taste, odor, and color, but they are not a complete water treatment solution, according to Saiqa Imran, Director of the National Water Quality Laboratory at Pakistan's PCRWR. In a recent interview, she explained that carbon filtration is just one stage in a multi-stage process, and other contaminants may require different treatment methods. The expert emphasized that the right treatment system depends on the specific quality of the water. Coal-based activated carbon is common for removing taste and smell, but turbidity and other impurities need separate filtration steps. For households or communities, relying solely on activated carbon could leave harmful contaminants in the water. This guidance is relevant for anyone designing water treatment systems in Pakistan, where water quality varies widely. A practical approach is to test water first and then build a treatment train that matches the actual contaminants.
