The Ganga (गगां) is a major river of the Indian subcontinent rising in the Himalaya Mountains and flowing about 2,510 km (1,560 mi) generally eastward through a vast plain to the Bay of Bengal. On its 1,560-mi (2,510-km) course, it flows southeast through the Indian states of Uttar Pradesh, Bihar, and West Bengal. In central Bangladesh it is joined by the Brahmaputra and Meghna rivers. Their combined waters (called the Padma River) empty into the Bay of Bengal and form a delta 220 mi (354 km) wide, which is shared by India and Bangladesh. Its plain is one of the most fertile and densely populated regions in the world. The Ganges alone drains an area of over a million square km with a population of over 407 million. Millions depend on water from the holy river for several things: drinking, bathing, agriculture, industry and other household chores .
Hindus have long believed that the water of Ganga has a special purity. Studies conducted in 1983 on water samples taken from the right bank of the Ganga at Patna confirm that escheria coliform (E.Coli.), fecal streptococci and vibrio cholerae organisms die two to three times faster in Ganga than in water taken from the rivers Son and Gandak and from dug wells and tube wells in the same area. However, despite the natural resilience of the Ganga, the alarmingly high volume of pollution poses an ever increasing threat to the health and life of the river.
The principal sources of pollution in the Ganga are domestic and industrial wastes. Conservative estimates put the effluents flowing into Ganga at approximately 1.7 billion litres each day out of which 1.4 billion litres is untreated.
The Ganga basin is home to over 300 million people, out of which 20 million live in densely populated cities directly along it banks. Most of the urban centres lack proper sewage treatment facilities. 88% of the pollution originates in 27 cities located along the banks. While industrial pollution accounts for only about a quarter of the whole problem, it is by no means insignificant since most of it is concentrated in specific areas and the effluents are more hazardous. The state of Uttar Pradesh alone is responsible for over 50% of the pollutants entering the river along its entire journey to the sea.
Domestic and industrial pollution, combined with deforestation, use of pesticides and fertilisers and other factors, have rendered the water of Ganga unfit for drinking or bathing.
Upstream from Varanasi, one of the major pigrimage sites along the river, the water is comparatively pure, having a low Bio-Oxygen Demand (B.O.D.) and Fecal Coliform Count. However, once the river enters the city these levels rise alarmingly. Measurements taken at the city's various bathing ghats during a few years ago show that the average B.O.D of the water rises by over 1300 percent. The average Fecal Coliform Count at the ghats is over 6000 times what it is before the river enters the city.
The Ganga Action Plan launched in 1986 by the Government of India has not achieved any success despite expenditure of over five billion rupees. Even though the government claims that the schemes under the Ganga Action Plan have been successful, actual measurements and scientific data tell a different story. The failure of the GAP is evident but corrective action is lacking.
Ganga River BasinGanges River
Hooghly River (distributary)
Jalangi River
River Churni
Ichamati River
Damodar River
Barakar River
Rupnarayan River
Ajay River
siang
tirap
Mayurakshi River
Dwarakeswar River
Mundeswari River
Meghna River (distributary)
Padma River (distributary)
Budhi Gandak
Kosi River
Falgu River
Gandak at Patna
Son River
Koel River
Rihand River
Gopad River
Goini River
Neur River
Banas River
Ghaghara River (Gogra) or Karnali River in Nepal
Yamuna River
Ban Ganga River
Betwa River
Dhasan River
Halali River
Kaliasote River
Sindh River
Kwari River
Pahuj River in Bhind District Madhya Pradesh
Chambal River
Banas River
Berach River
Ahar River
Kali Sindh River
Parbati River (Madhya Pradesh)
Shipra River in Ujjain
Gambhir River
Parbati River (Rajasthan)
Gomti River
Mahananda River
Mahakali River
Bhagirathi River
Alaknanda River
Gangi River
Beson River
Mangai River
Bhainsai River
Tamsa River
Karmanasha