Founded in 1943, United Blood Services as Salt River Valley Blood Bank in Arizona, United Blood Services is a nonprofit community blood center that provides blood and its components to patients in more than 500 hospitals in over 15 states. It serves nearly 15 million people throughout the United States. The center works to bring people together by inspiring individuals to donate blood and produce a safe and ample blood supply. United Blood Services distributes a variety of blood derivatives and supports autologous and directed donations, as well as other special and therapeutic collections. It is a part of Blood Systems, which is one of the oldest and largest blood service providers in the United States. S.