 Two new strains of gram-positive bacteria have been discovered that can tolerate high levels of arsenic in their environment. These strains, named SW2 and SW4, can remove up to 51.45% and 51.99% of arsenite and 53.29% and 50.37% of arsenate from arsenic-containing cultures, respectively. Furthermore, these strains can convert arsenite into less toxic arsenate, suggesting that they could be used as a potential tool for bioremediation of arsenic-contaminated environments. This article was authored by Itiya Day, Sumandranath Chatterjee, and Nava Kumar Mondal.