BULK WATER SUPPLY Shimla has more than century old lift water supply systems and one of its kinds in India. The pumping machinery to lift water is more than hundred years old and unique. The water is lifted at an average head of 1470 meters from the various sources and transported by the high pressure water conveyor system to the reservoir situated at the outskirts of Shimla city. The Shimla water supply scheme started in 1875 with the capacity of 4.54 MLD, catering to a population of 16,000. Thereafter, Shimla water supply five augmentation schemes for meeting the needs of the ever growing population. Three of this augmentation schemes were commissioned prior to independence, while the fourth and fifth were commissioned after independence. The last augmentation scheme for the city was commissioned in 1992. The total installed capacity of the various schemes of the Shimla water supply system is 61.5 MLD, however, over the period of times owing to the various factors such as competing demands from agriculture /horticulture and depletion of water in sources due to climate change, the availability of the water for Shimla city has gone down substantially, in the lean season availability of water from these sources is as low as 33 MLD. SOURCES OF WATER The drinking water for Shimla city is supplied fromseven sources. All the sources have their unique location and features. SEOG This source of water is near to the Shimla city and situated downstream of the dense and majestic Shimla Water Catchment Wildlife Sanctuary. This source is ideal water source and water is harvested from this source as per the best environmental practices. The catchment of the sources is maintained as per the best conservation standards and practices in the World. This catchment area has Churat water supply scheme and have installed capacity of 4.8 MLD GIRI Giririver is an important tributary of the Yamuna river. The Giri which is famous by the name of Giriganga in the Jubbal, Rohru hills in Shimla district, rises from Kupar peak just above Jubbal town after flowing through the heart of Shimla hills, flows down in the South-Eastern direction and divides the Sirmaur district into equal parts that are known as Cis-Giri and Trans-Giriregion and joins Yamuna upstream of Paonta below Mokkampur. The lift water supply scheme from river Giri has installed capacity of 20 MLD, this one of the recent water supply schemes of Shimla city. GUMMA The Gumma lift water scheme is on of the oldest schemes of Shimla water supply and is built in pre-independence era, this is unique scheme which includes lifting of water over 1470 meter in single stage .The scheme has two intake points in this schemes at Gumma and NautiKhad. This source is around 21 kilometers away from Shimla city and contributes maximum water supply to Shimla city. The source stream is tributary of the river Satluj. The installed capacity of the scheme is 23.4 MLD ASHWANIKHAD The source of Ashwani khad originates from the Shimla Catchment area, this stream is one of the important and nearest source of water for Shimla city. The installed capacity of the lift water scheme of Shimla city from this source is 10.8 MLD CHAIR This is small source of the in the north west of the Shimla city, this one of the pre independence water supply scheme and have total installed capacity of 2.5 MLD. The source of the water is from Chair khad in the river Satluj basin.