atlanta gas light company (aglc), commonly still known as atlanta gas light (agl), is the largest natural gas wholesaler in the southeast u.s., and is the "agl" in parent company agl resources. it was founded in 1856 and is headquartered in atlanta, as is agl resources. it provides distribution and metering to more than 1.6 million residential, commercial, and industrial customers in 243 communities throughout the state of georgia.