The objective of this research is to produce a paste made with mango seed that has the property of reducing mercury in water. Mercury has become increasingly common due to industrial waste and has a variety of side effects due to its high toxicity. On an industrial level, mango seed is a waste that has no use; however, it contains nutrients such as calcium, zinc, magnesium and other components that could be used otherwise. On the other hand, this part of the fruit forms between 9% and 23% of its constitution. Another important point to take into consideration is that there is a growing tendency to generate organic pastes that fulfill the purpose of filtering due to the non-decreasing need of many communities to have potable water. In order to achieve this, an experimental methodology will be applied where the seed, after going through a process of dehydration, will be screened at 150 microns to filter contaminated solutions of mercury from 10 ppb to 100 ppb. It will also be taken into consideration how this affects the water’s ph and the contact time in the decrease of mercury.