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Name Location Dependent population Description Sources of pollution Impact Bharalu River: Assam, India: One of the most polluted rivers in the state of Assam. [19] The biochemical oxygen demand of the river is 52 mg/L in compared to the permissible limit set by the National River Conservation Directorate (NRCD) at 3 mg/L. [20]
Under the NRCP scheme, the CPCB conducted river basin studies and identified 19 polluted stretches and 14 less polluted stretches along 19 rivers, including 11 stretches along 7 rivers in Madhya Pradesh. Phase II covered 59 towns across five states, with more than ₹5.053 billion spent.
Water pollution is a major environmental issue in India. The largest source of water pollution in India is untreated sewage. [1] Other sources of pollution include agricultural runoff and unregulated small-scale industry. Most rivers, lakes and surface water in India are polluted due to industries, untreated sewage and solid wastes.
A shallow river stretch of the great Ganges with intermittent small stretches of deep-water pools and reservoirs upstream from barrages. The river provides habitat for the IUCN Red Listed Ganges river dolphin , gharial , crocodile, six species of turtles, otters, 82 species of fish, and more than a hundred species of birds.
Fertilizers and pesticides used in agriculture in northwestern India have been found in rivers, lakes and ground water. [23] Flooding during monsoons worsens India's water pollution problem, as it washes and moves all sorts of solid garbage and contaminated soils into its rivers and wetlands.
Air pollution in India is a major environmental issue. Shown above is the Taj Mahal blanketed by smog. Pollution is one of the main environmental issues in India. Water pollution is a major concern in the country. The major sources of water pollution are domestic, industrial, agricultural and shipping waste waters. [16]
In 2018, an assessment by the Central Pollution Control Board (CPCB) named the Kheroj-Vautha stretch of the Sabarmati among the most polluted river stretches in India. [18] Ahmedabad civic body's failure to build a sewage treatment plant in Motera resulted in further pollution of the river water. [19]
The rating includes around 500 cities, covering 72 percent of the urban population in India. Until 2017, India was divided into five zones for the purpose of this survey and each city was scored on 19 indicators. The cities were classified into four colours: green, blue, black, and red, green being the cleanest city, and red the most polluted.