[Metropolitan Emergency Medical Services - MEMS MEMS is a public, non-profit entity, and is governed by the Little Rock Ambulance Authority (LRAA). Serving Pulaski and Grant Counties and the cities of Maumelle, Sherwood, and Cabot, MEMS covers approximately 1,800 square miles and more than 400,000 people. Since 2004, MEMS has been accredited with the Commission on Accreditation of Ambulance Services (CAAS) which signifies a “Gold Standard” in emergency medical service providers.]