How many paramedics can an ambulance take?

This depends on the type of ambulance and the area it is operating in. Ambulances are either basic life support (BLS) or advanced life support (ALS). BLS trucks have EMT-basics instead of paramedics. ALS trucks legally must have one paramedic on board, and either an emt-basic in a rural setting, or a second paramedic in a metropolitan area. However, it is all up to the agency staffing the ambulance.