Abstract Heavy metals Pb and Cd are heavy metals that are toxic to aquatic organisms. Bacillaria sp. is one of the diatoms that acts as the first producer in water. This study aims to compare the effect of Pb and Cd on the growth of Bacillaria sp. This study was carried out in March to May 2021. Toxicity of heavy metals on the growth of Bacillaria sp. refers to the standard method of the A…