Midwest Reliability Organization. The Midwest Reliability Organization (MRO) is one of 10 Regional Reliability Councils that comprise the North American Electric Reliability Council (NERC). The MRO is a voluntary association committed to safeguarding reliability of the electric power system in the north central region of North America. The essential purpose of this regional reliability organization is the development, implementation, and enforcement of compliance with North American and regional electric reliability standards. The MRO region includes more than forty members supplying approximately 280 million megawatt-hours to more than 20 million people. The MRO membership is comprised of municipal utilities, cooperatives, investor-owned utilities, a federal power marketing agency, Canadian Crown Corporations, and independent power producers. The MRO region spans eight states and two Canadian provinces covering roughly one million square miles. Membership solicitation is ongoing. Basin Electric Power Cooperative is a member.