Modern water filter used the techraque of RO ( Reverse osmosis). Ans ultraviolet radiation to print water. fresh water in rivers lakes and streams which we. Can readily use forms only 0.3 % all the water available on the earth. we must use water very sensibly we. Should not waist water or pollution water. We can adopt following steps to save water at home: Reuse kitchen water to water plansts in your garden.  Close taps properly after use. Replace or repair leaking taps pipes immediately. Avoid using a shower for bathing as it uses more water. Also avoid the use of a House pipe for washing vehicles. Do not throw plastics and polythene bags into a water sources or a drain. Create awareness about water conservation among people.