What are the major causes of water pollution? Explain.

Asked by Abhisek | 1 year ago |  53

1 Answer

Solution :-

Water pollution occurs when undesirable and unwanted substances are added to the water bodies thus choking the aquatic life in those water bodies.

The major sources of water pollutants are as given below:

Pollutant

Source
Organic wastes

Domestic sewage, discharge from food 

processing industries, animal

excreta and waste, decaying animals and plants

Micro-organisms Domestic sewage
Sediments Strip mining and soil erosion
Plant nutrients Chemical fertilizers
Radioactive substances Mining of uranium ores
Pesticides Chemicals used for killing fungi, weed, insects
Toxic heavy metals Chemical factories and industries
Heat Water used for cooling in industries

The major pollutants are:

1. Pathogens: Bacteria and other micro-organisms come under this category. They get into water bodies through domestic sewage and animal excreta. Bacteria like Escherichia coli and Streptococcus faecalis which are found in human excreta are known vectors of gastrointestinal diseases.

2. Organic wastes: They are generally bio-degradable wastes that pollute the water bodies by mixing with them during their runoff phase. An excess amount of organic matter in water bodies suck up the dissolved oxygen in water thus inhibiting aquatic life in these water bodies.

3. Chemical pollutants: Heavy metals like mercury, cadmium and nickel come under this category. These chemicals when present above the allowable limit can result in damage of the central nervous system, kidneys and liver.

Answered by Pragya Singh | 1 year ago

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