This project deals with the filtration of waste water using corncobs which are generally used as fuel which creates air pollution and global warming. Corn cobs are one of the most plantyand important agricultural wastes in maize cultivation. Thus, theprimary concern is the economical and efficient utilization of these corn cobs for a purpose. As they are porous, they can be used as water filtrates.In this project discusses about a low cost water filtration system which uses corncobs as filter materials in its various forms. In developing countries, good quality water is contaminated due to the disposal of untreated municipal and domestic waste water into natural water reservoirsand lakes. Most of the wastewater is not treated properly according to standards, and usually is disposed of and utilized for irrigation without appropriate treatment.