Lansing/Jackson area, Detroit, Windsor, and Toledo. Ann Arbor is part of the Detroit television market. WPXD channel 31, the owned-and-operated Detroit outlet of the ION Television network, is licensed to the city. Until its sign-off on August 31, 2017, WHTV channel 18, a MyNetworkTV-affiliated station for the Lansing market, was broadcast from a transmitter in Lyndon Township, west of Ann Arbor. Community Television Network (CTN) is a city-provided cable television channel with production facilities open to city residents and nonprofit organizations. Detroit and Toledo-area radio and television stations also serve Ann Arbor, and stations from Lansing and Windsor, Ontario, can be seen in parts of the area. Health, environment, and utilities The University of Michigan Medical Center, the only teaching hospital in the city, took the number 1 slot in U.S. News & World Report for best hospital in the state of Michigan, as of 2015. The University of Michigan Health System (UMHS) includes University Hospital, C.S. Mott Children's Hospital and Women's Hospital in its core complex. UMHS also operates out-patient clinics and facilities throughout the city. The area's other major medical centers include a large facility operated by the Department of Veterans Affairs in Ann Arbor, and Saint Joseph Mercy Hospital in nearby Superior Township. The city provides sewage disposal and water supply services, with water coming from the Huron River and groundwater sources. There are two water-treatment plants, one main and three outlying reservoirs, four pump stations, and two water towers. These facilities serve the city, which is divided into five water districts. The city's water department also operates four dams along the Huron River—Argo, Barton, Geddes, and Superior—of which Barton and Superior provide hydroelectric power. The city also offers waste management services, with Recycle Ann Arbor handling recycling service. Other utilities are provided by private entities. Electrical power and gas are provided by DTE Energy. AT&T Inc. is the primary wired telephone service provider for the area. Cable TV service is primarily provided by Comcast. A plume of the industrial solvent dioxane is migrating under the city from the contaminated Gelman Sciences, Inc. property on the westside of Ann Arbor. It's currently detected at 0.039 ppb. The Gelman plume is a potential threat to one of the City of Ann Arbor's drinking water sources, the Huron River, which flows through downtown Ann Arbor. Transportation Surface roads and paths The streets in downtown Ann Arbor conform to a