Incorporated in 1863, Elkton Gas, a subsidiary of AGL Resources, serves more than 5,000 residential and business natural gas customers in Maryland. Elkton Gas provides gas and related energy services for homes, businesses and industries. It offers maintenance and repair services for heating systems and appliances. The company also works with regional emergency response officials to maintain natural gas pipeline infrastructure. Elkton Gas reads residential, commercial and industrial meters on monthly basis. In addition, it provides boilers and cooling systems. The company also offers a range of services for gas system operators and underground construction projects. Elkton Gas serves clients in Pennsylvania, Delaware and Maryland. AGL Resources is one of the preeminent distributors of natural gas in the United States.