Established in 1983, Tri-Hospital EMS is one of the largest ambulance providers in St. Clair County, Mich., that provides services to more than 140,000 individuals in over a 650-square-mile radius. It offers emergency and nonemergency ambulance transportation and is the owner of Mobile Health Resources. Tri-Hospital EMS also offers assisted transportation, an ambulatory and wheelchair-accessible service that that provides patients with room to move around. Additionally, it has a communication center that provides the services of certified emergency medical dispatchers to awaiting crews. Tri-Hospital EMS is accredited by the Commission on the Accreditation of Ambulance Services. It employs a staff of more than 70 professionals. Tri-Hospital EMS maintains its headquarters in Port Huron, Mich.. Ambulance Service