The City of Yellowknife provides pressurized potable water throughout the majority of the city, and has a network of gravity-fed sewage lines; trucked water and sewage is provided in areas not serviced by piped infrastructure. Sewage, with the aid of lift stations, is pumped to a series of lakes, referred to as Fiddler's Lake Lagoon, where it is held and allowed to naturally decompose. Water is obtained from the Yellowknife River and is disinfected with chlorine and liquid fluoride is added, but is not otherwise filtered or treated.