Z Zeolite is a silicate alumina mineral which has a hollow skeleton structure which contains metal ions and water molecules. This mineral consists of a collection of SiO4 and AIO4, where the negative charge formed is neutralized by alkaline metal ions or alkaline earth which can move freely so that it can be exchanged with other similarly charged ions. In the village of Bayah, South Banten, the availability of this mineral is quite abundant and ready to be utilized.There are several aspects that form the basis of the use of zeolites, including aspects of adsorption, catalysts, cation exchangers, and molecular filters. On this occasion the authors conducted a research on the aspects of the cation exchanger. And molecular filters. On this occasion, the authors conducted research on the aspects of the cation exchange.For this reason, the Bayah zeolite research was carried out on the effect of influent concentration and pH on the volume and concentration of breakthrough effluent in the Cu2 + and Pb2 + cation exchange processes.Through research, it was found that the best breakthrough volume and effluent concentration were in the influent solution with small concentrations, while the good pH area for the cation exchange process was pH 5.From the value of cation exchange, it is known that zeolite is more selective towards Cu 2+ cations than the Pb2 + cation.