Pacific Gas & Electric Company is the largest provider of electricity and gas service. Pacific Bell is the primary provider of local telephone service. Comcast Cable provides cable television services. The City of Brisbane furnishes water distribution and sewage collection services. Through purchases from the San Francisco Water Department and the Hetch-Hetchy system [which the City and County of San Francisco maintains], Brisbane obtains fresh water from the Sierras. Brisbane's sewage treatment is processed at a plant in the City and County of San Francisco.