In many developing nations, water shortage is a big issue. Rainwater may be used as a foundation of intake water depending on the amount of precipitation. Furthermore, good management might help alleviate water and nourishment lacks in around of these zones. Rainwater harvesting (RWH) is a method for successfully collecting surface runoff during rainy times. RWH systems should be built on local skills, resources, and apparatus to support such innovations. Rainwater harvesting may then be utilized for rainfed farming or home water supply. Rainwater, however, may be contaminated with microorganisms and harmful substances, necessitating treatment before to use. Pollution may be reduced using slow sand filtering and solar technologies. Membrane technology might potentially be used to purify water to ensure that it is safe to consume