Because of you - our blood donors, volunteers, financial supporters and dedicated employees - patients are granted another day through the precious gift of blood. Our community-based, not-for-profit blood center provides blood and services throughout Norhtern and Central California and beyond - wherever and whenever the need. When you support BloodSource, yes, you do save lives.. Blood Collection,Blood Components Collection: Platelets and Plasma,Center and Mobile Blood Drives,Blood Donor Testing Laboratory,Rare Blood Reference Laboratory,Transfusion Medicine Consultation