A water purifier is a device or system designed to remove impurities and contaminants from water, making it safe and suitable for drinking, cooking, and other household uses. These impurities can include bacteria, viruses, chemicals, heavy metals, and other harmful substances that may be present in untreated water sources. Water purifiers employ various technologies such as filtration, reverse osmosis, ultraviolet (UV) disinfection, and activated carbon adsorption to effectively remove or neutralize contaminants.

In a city like Bangalore, where water quality can be a concern due to pollution, industrial runoff, and inadequate sanitation infrastructure, water purifiers play a crucial role in ensuring access to clean and safe drinking water for residents. Depending on the specific contaminants present in the water supply, different types of water purifiers may be required to achieve the desired level of purification. For example, a combination of filtration and UV disinfection may be suitable for removing bacteria and viruses, while reverse osmosis may be necessary to eliminate dissolved salts and heavy metals.