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In this modern era, water which is essential is running short all over the world. Therefore, humans need to identify ways to reduce water consumption and try as much as possible to reuse and recycle water for better use. The current study is focused on a wastewater treatment system that is designed for the reuse of kitchen, bathroom and washing machine water. I have made Economical Water Filtration from Household Grey Water as a way to reuse, reduce, and recycle used water known as greywater. Greywater is wastewater from any household source other than toilets. Greywater makes up roughly 60% of household wastewater. The purpose of this project is to contribute water by recycling greywater to people during water crisis and those who are having difficulties from their households. Water is the most essential commodity for sustaining life on planet earth. Polluted water is not only dirty, but also deadly. The method used is simple and cost saving. In this filtration system, greywater goes through seven processes before being used as recycled water. The basic setup of the invention is setting up three tanks. A physical method of treating wastewater has been implemented, making it eco-friendly and energy efficient. There are many similar projects out and more expensive systems in the market. But I have differentiated it by making it the simplest and cheapest filtration system. I use rice straw as a filter, Canna Plant which has a property to remove phosphates from dish washing detergent and sludge. With simple tools you can also create a recycling system at your home or make a small model of it to display at the science fair or exhibition at school. Lesson learnt while carrying out the project is that this product will save tons of ringgit Malaysia for the government in treating greywater. Everyone who tried out these filters found that it is cheap, eco-friendly and easy to use and maintain.