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The Central Pollution Control Board (CPCB) reported that as of 2016, there were 746 industries directly depositing wastewater into the Ganga, which is the largest river in India. This wastewater contains heavy metals such as lead , cadmium , copper , chromium , zinc , and arsenic , which negatively affect both aquatic life as well as human health.
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]
Thermal pollution is the rise or drop in the temperature of a natural body of water caused by human influence. Thermal pollution, unlike chemical pollution, results in a change in the physical properties of water. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. [46]
The river supplies water to approximately 40% of India's population across 11 states [2] and serves an estimated 500 million people—more than any other river in the world. [3] [4] The Ganges is severely polluted with human waste and industrial contaminants. Currently, it is considered the most polluted river in the world. [5]
Despite the heavy reliance of public life on the river, it was named as one of the 10 most dangerous rivers in the world in 2007 due to water pollution. [35] The first Ganges cleaning program (Ganga Action Plan) was started in 1985 with an aim to tackle the problem of excessive water pollution in the river. The program was gradually expanded to ...
The nation’s rivers and streams remain stubbornly polluted with nutrients that contaminate drinking water and fuel a gigantic dead zone for aquatic life in the Gulf of Mexico, according to a ...
Also available are modern shower heads that help reduce wasting water: Old shower heads are said to use 5-10 gallons per minute, while new fixtures available use 2.5 gallons per minute and offer equal water coverage. [23] Another method is to recycle the water of the shower directly, by means a semi-closed system which features a pump and filter.
Sources of water pollution are either point sources or non-point sources. [84] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant or an oil spill. Non-point sources are more diffuse. An example is agricultural runoff. [85] Pollution is the result of the cumulative effect over time. Pollution may take ...