Utility services in Mumbai

The BMC supplies potable water to the city, most of which comes from the Tulsi and Vihar lakes, as well as a few lakes further north. The water is filtered at Bhandup, which is Asia's largest water filtration plant. Even India's first underground water tunnel will come up in Mumbai.[40] The BMC is also responsible for the road maintenance and garbage collection in the city. Almost all of Mumbai's daily refuse of 7,800 metric tonnes is transported to dumping grounds in Gorai in the northwest, Mulund in the northeast, and Deonar in the east. Sewage treatment is carried out at Worli and Bandra, and disposed off by two independent marine outfalls of 3.4 km (2.1 mi) and 3.7 km (2.3 mi) at Bandra and Worli respectively. A third outfall at Malad is in the planning stages.
Electricity is distributed by BEST in the island city, and by Reliance Energy, Tata Power, and Mahavitaran (Maharashtra State Electricity Distribution Co. Ltd) in the suburbs. Most of the city's electricity is hydroelectric and nuclear based. Consumption of electricity is growing faster than production capacity. The largest telephone service provider is the state-owned MTNL, which held a monopoly over fixed line and cellular services up until 2000, and provides fixed line as well as mobile WLL services. Cell phone coverage is extensive, and the main service providers are Vodafone Essar, Airtel, MTNL, BPL group, Reliance Communications, Idea Cellular and Tata Indicom. Both GSM and CDMA services are available in the city. Broadband internet penetration is increasing in the city, with MTNL and Tata being the leading service providers.