With every passing day we have been seeing a rise in contaminants level in water. Ground water, river water or whichever it be level of pollutants in water have been on constant rise. Reason for this can range from discharge of untreated effluents in river or contamination from industrial sources. Water may contain three types of contaminants namely physical, microbiological, or dissolved one.
Contemporary water purifier may be able to remove physical impurities and take care of microbiological such as bacteria and virus up to certain level. However when you want water as good as packaged drinking water only reverse osmosis water purifier can take care of it. Primary function of any ro water purifier is to remove dissolved impurities  which determines the taste of your water. Any harm caused from dissolved impurities are just irreversible so its always better to be safe then to be sorry. However ro water purifier not only takes care of dissolved impurities but also removes 99.99 % of bacteria and virus in it apart from physical. Since the technology has been evolving in India every day we see a new purifier in the market with new addition like Ro + UV + UF. Now we have been seeing a rise of alkaline water purifier too. This alkaline cartridge tries to maintain the alkalinity of water and PH level of water. So as the technology evolves certainly we will be seeing many more new technology and few more jargons.